WSR 19-24-040
PERMANENT RULES
BUILDING CODE COUNCIL
[Filed November 26, 2019, 9:42 a.m., effective July 1, 2020]
Effective Date of Rule: July 1, 2020.
Purpose: Adoption and amendment of the 2018 Washington State Energy Code, Commercial, chapter 51-11C WAC.
Citation of Rules Affected by this Order: New one hundred thirty-one sections and amending one hundred eighty-seven sections of chapter 51-11C WAC.
Statutory Authority for Adoption: RCW 19.27A.020, 19.27A.025, 19.27A.160.
Other Authority: Chapter 19.27 RCW.
Adopted under notice filed as WSR 19-11-073 on May 16, 2019.
Changes Other than Editing from Proposed to Adopted Version:
1.
Definition: Computer room, corrected typo in acronym; changed the "and" to an "or."
2.
Definition: Door, Garage, added a definition for clarity to differentiate from nonswinging door.
3.
Definition: Door, Nonswinging, added a reference to garage doors.
4.
Definition: Fenestration-Vertical Fenestration, removed reference to undefined term "glazed doors."
5.
Definition: Retrofit, Building Envelope, did not adopt this code change; correct term should be alteration or addition.
6.
Definition: Space Conditioning Category, deleted subjective phrase "from lowest to highest."
7.
C401.2, Application, new section C411, solar readiness, is added to the general prescriptive and outcome-based methods. C410, refrigeration, is also added to the outcome-based path.
8.
Table C402.1.1.3, nonopaque thermal envelope maximum requirements, as referenced in Section C402.1.1.3 but missing from the CR-102, was added back.
9.
C402.2.4, Below grade walls, C-factor was changed to U-factor, since there are no C-factors in the cited table.
10.
C402.4.1.1, Vertical fenestration maximum area with high performance alternates, the sentence prohibiting the use of high performance alternates with the total building performance option was deleted.
11.
C402.4.1.1.1, Optimized daylighting, missing portions of the section were added.
12.
C402.5.1.2, Building test, the council added back in the allowance for corrective action without retesting for tests that fail by a margin of 0.15 cfm/ft2or less.
13.
C403.1.1, HVAC TSPR, grammatical change for clarity.
14.
C403.2, System design, section reference correction.
15.
C403.4.3.3.3, Isolation valve, section reference correction.
16.
Table C403.4.4, Variable speed drive requirements for demand-controlled pumps, the chilled water and heat rejection loop pumps value was changed to 7.5 hp to correlate with the requirements in the text in Section C403.2.3.
17.
C403.4.5, Pump isolation, the exception was deleted as it contradicts the intent of the section.
18.
C403.5, Economizers, a requirement that exempt chillers have a minimum COP of 7 was added to exception 7. Two additional exceptions were added to address DOAS systems.
19.
C403.7.6, Energy recovery ventilation systems, clarification of requirements for energy recovery with mechanical cooling. The numbering of exceptions was corrected, and exception 10 was revised to reflect the requirement for energy recovery for R-2 occupancies in Section C403.3.6.
20.
Table C403.7.6(2), Energy recovery requirement (systems operating over 8,000 hr./yr.), included missing ICC values for Climate Zone 5B for 50% to 80% outdoor air.
21.
C403.7.7.2 Laboratory exhaust systems, substituted the term "replacement air" for "makeup air."
22.
C403.8.3, Fan efficiency, exceptions were consolidated, correlated and clarified.
23.
C403.9 Heat rejection and heat recovery equipment, this section was reorganized and renumbered to provide two separate sections: C403.9.1 for heat rejection and C403.9.2 for heat recovery. Redundant language was deleted.
24.
C403.9.2.4, Heat recovery for space heating, clarification as to applicability.
25.
C403.9.2.4.2, Exhaust heat recovery, exceptions were added addressing hazardous exhaust.
26.
C403.9.2.3, Process heat recovery, section was modified to provide additional direction for use with economizer.
27.
C403.9.2.4.4, Water-to-water heat recovery sizing, minor editorial changes.
28.
C404.2.1, High input-rated service water heating systems for other than Group R-1 and R-2 occupancies, this section was modified to move the exception for Group R-1 and R-2 to the title, remove remaining redundant language in the first paragraph, make the second paragraph more generic to avoid any conflicting requirements, clarified requirements in regards to fuel type efficiencies, and added exceptions for backup heating, health-related concerns and district energy.
29.
C404.2.2, High input-ratedservice water heating systems for Group R-1 and R-2 occupancies, modifications were made to correlate language with the changes made to Section C404.2.1, and for language consistency within the code.
30.
C405.1, General, clarified the application to lighting in dwelling units and added language to address sleeping units. Moved those residential requirements to subsection C405.1.1 and correlated language with the residential energy code.
31.
C405.2.1, Occupant sensor controls, requirements for stairways was clarified; a new exception for classrooms was added.
32.
C405.2.1.4, Occupant sensor control function in parking garages, language for exception 2 was clarified.
33.
C405.2.2.1, Time switch control function, the first sentence was struck since it was redundant to earlier language.
34.
C405.2.3, Manual controls, the language in item 3 was clarified.
35.
Table C405.4.2(1), Interior lighting power allowanceBuilding area method, there were two options printed in the CR-102. The final adopted version is a hybrid, with values mainly taken from the most recent draft of ASHRAE 90.1, with the LPA from the current energy code retained where the value was lower.
36.
Table C405.4.2(2), Interior lighting power allowanceSpace by space method, there were two options printed in the CR-102. The final adopted version is taken from the most recent draft of ASHRAE 90.1. Categories not present in the ASHRAE draft were removed: Audience: in a convention center; beauty salon; parking facility, dedicated ramp; sales area, grocery; fire station: engine room. Atrium categories revert to the previous types. Confinement cell was added. Lounge/breakroom was separated into healthcare and other. The additional allowance for decorative and display lighting was removed.
37.
C405.5.1, Exterior building grounds lighting, the threshold and efficacy for grounds lighting was changed to luminaires over 50 watts having an efficacy of 100 lumens per watt.
38.
C405.7 Dwelling unit electrical energy consumption, in the exception, the word "apartment" was changed to "multi-family."
39.
C405.8 Electric motor efficiency, the extraneous word "high" was removed from exception 5.
40.
C406.1 Efficiency packages, the language was clarified for application to multi-tenant buildings and mixed use buildings.
41.
Table C406.1, missing footnote c was added to options 10 and 11.
42.
C406.1.1 Tenant spaces, the language was clarified and harmonized with that in Section C406.1. It was also broken into two additional subsections (C406.1.1.1, Applicable envelope and on-site renewables and C406.1.1.2, Applicable HVAC & service water) to help clarify intent and application for tenant spaces and tenant improvement.
43.
C406.2 More efficient HVAC equipment and fan performance, an inaccurate section reference was removed and another was corrected.
44.
C406.3.3 Lamp fraction, the unnecessary phrase "high efficacy" was removed from the statement of the minimum efficacy required for lamps.
45.
C406.4 Enhanced digital lighting controls, this section was reformatted for ease of use, with a new function subsection.
46.
C406.5 On-site renewable energy option, corrected section reference and clarified that this option is also allowable for tenant spaces and additions.
47.
C406.7 High performance DOAS, corrected section reference and clarified that this option is also allowable for tenant spaces and additions.
48.
C406.8 Reduced energy use in service water heating, clarified that this option is also allowable for tenant spaces and additions.
49.
C406.9 High performance service water heating in multifamily buildings, clarified that this option is also allowable for tenant spaces and additions.
50.
C406.11 Reduced air infiltration, clarified that this option is also allowable for tenant spaces and additions.
51.
Table C407.2, Mandatory Compliance Measures for Total Building Performance Method, solar readiness was added to the list of mandatory requirements.
52.
C409.1 General (metering), fixed section reference; simplified the language.
53.
C501.4.1 U-factor requirements for additions and alterations, replaced the word "retrofit" with the defined word "alteration." Clarified the language in the exception.
54.
C501.4.2 Calculations of mechanical heating and cooling loads for alterations, replaced the word "retrofit" with the defined word "alteration." Clarified the language in the exceptions.
55.
C502.1 General (Additions), added Section C406 to the list of sections additions must comply with.
56.
C502.2.1 Vertical fenestration, deleted item 1 dealing with skylights since there is no application to this section.
57.
C503.2 Change in space conditioning, duplicative language was removed and remaining language in exceptions was edited for clarity and applicability.
58.
C503.3.2 Vertical fenestration, language edited for clarity and missing modified language was inserted; section was aligned with Section C405.
59.
C503.3.3 Skylight area, language edited for clarity and missing modified language was inserted; section was aligned with Section C405.
60.
Table C503.4 Economizer compliance options for mechanical alterations, language clarifications and reference corrections.
61.
C505.1 General (Change of occupancy or use), duplicative language was removed and remaining language in exceptions was edited for clarity and applicability.
62.
Reference standards, updated ASHRAE 90.1 to the 2016 edition referenced in the 2018 IECC.
63.
D101 Scope (HVAC TSPR), clarifications and editorial corrections to language.
64.
F101.3.1 Anticipated building energy use (Outcome based compliance), vehicle recharging was removed from the list of building energy services.
65.
F101.4.2 Change of occupancy use during monitoring period, the occupancy level target was changed from 85 percent to 50 percent.
66.
F101.4.5 Energy budget liability, this section was removed from the code as it was not consistent with building code general contents for scoping and requirements.
67.
F101.6 Performance bond or financial security, the provision for an option of providing a bond equal to the cost of installing PV was removed.
A final cost-benefit analysis is available by contacting Richard Brown, P.O. Box 41449, Olympia, WA 98504-1449, phone 360-407-9277, email Richard.brown@des.wa.gov, website sbcc.wa.gov.
Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 0, Amended 9, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.
Number of Sections Adopted at the Request of a Nongovernmental Entity: New 0, Amended 209, Repealed 0.
Number of Sections Adopted on the Agency's own Initiative: New 0, Amended 0, Repealed 0.
Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, Amended 0, Repealed 0.
Number of Sections Adopted using Negotiated Rule Making: New 0, Amended 0, Repealed 0; Pilot Rule Making: New 0, Amended 0, Repealed 0; or Other Alternative Rule Making: New 0, Amended 218, Repealed 0.
Date Adopted: July 26, 2019.
Doug Orth
Council Chair
Chapter 51-11C WAC
STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE ((2015))2018 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, COMMERCIAL
AMENDATORY SECTION(Amending WSR 17-17-162, filed 8/23/17, effective 10/1/17)
WAC 51-11C-10100Section C101Scope and general requirements.
C101.1 Title. This code shall be known as the Washington State Energy Code, and shall be cited as such. It is referred to herein as "this code."
C101.2 Scope. This code applies to commercial buildings and the buildings sites and associated systems and equipment. References in this code to Group R shall include Group I-1, Condition 2 assisted living facilities licensed by Washington state under chapter 388-78A WAC and Group I-1, Condition 2 residential treatment facilities licensed by Washington state under chapter 246-337 WAC. Building areas that contain Group R sleeping units, regardless of the number of stories in height, are required to comply with the commercial sections of the energy code.
EXCEPTION:
The provisions of this code do not apply to temporary growing structures used solely for the commercial production of horticultural plants including ornamental plants, flowers, vegetables, and fruits. A temporary growing structure is not considered a building for the purposes of this code. However, the installation of other than listed, portable mechanical equipment or listed, portable lighting fixtures is not allowed.
C101.3 Intent. This code shall regulate the design and construction of buildings for the use and conservation of energy over the life of each building. This code is intended to provide flexibility to permit the use of innovative approaches and techniques to achieve this objective. This code is not intended to abridge safety, health or environmental requirements contained in other applicable codes or ordinances.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-10140Section C101.4Applicability.
C101.4 Applicability. Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive shall govern. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall govern.
C101.4.1Mixed ((occupancy))residential and commercial buildings. Where a building includes both residential building and commercial((occupancies, each occupancy))building portions, each portion shall be separately considered and meet the applicable provisions of WSECCommercial Provisions or WSECResidential Provisions.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-10150Section C101.5Compliance.
C101.5 Compliance.Residential buildings shall meet the provisions of WSECResidential Provisions. Commercial buildings shall meet the provisions of WSECCommercial Provisions.
C101.5.1 Compliance materials. The code official shall be permitted to approve specific computer software, worksheets, compliance manuals and other similar materials that meet the intent of this code.
C101.6 Appendices. Appendices A, B, C, and D are included in the adoption of this code. Provisions in Appendices E and F shall not apply unless specifically adopted by the local jurisdiction.
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-10200Section C102((Alternate materialsMethod))Alternative materials, design and methods of construction((, design or insulating systems))and equipment.
C102.1 General.The provisions of this code ((is))are not intended to prevent the ((use of any material, method of construction, design or insulating system not specifically prescribed herein, provided that such construction, design or insulating system has been approved by the code official as meeting the intent of this code))installation of any material, or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design or method of construction shall be approved where the code official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, not less than the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety. Where the alternative material, design or method of construction is not approved, the code official shall respond in writing, stating the reasons why the alternative was not approved.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-10300Section C103Construction documents.
C103.1 General. Construction documents and other supporting data shall be submitted in one or more sets with each application for a permit. The construction documents shall be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. Where special conditions exist, the code official is authorized to require necessary construction documents to be prepared by a registered design professional.
EXCEPTION:
The code official is authorized to waive the requirements for construction documents or other supporting data if the code official determines they are not necessary to confirm compliance with this code.
C103.2 Information on construction documents. Construction documents shall be drawn to scale upon suitable material. Electronic media documents are permitted to be submitted when approved by the code official. Construction documents shall be of sufficient clarity to indicate the location, nature and extent of the work proposed, and show in sufficient detail pertinent data and features of the building, systems and equipment as herein governed. Details shall include, but are not limited to, as applicable:
1. Insulation materials and their R-values.
2. Fenestration U-factors and SHGCs.
3. Area-weighted U-factor and SHGC calculations.
4. Mechanical system design criteria.
5. Mechanical and service water heating system and equipment types, sizes and efficiencies.
6. Economizer description.
7. Equipment and systems controls.
8. Fan motor horsepower (hp) and controls.
9. Duct sealing, duct and pipe insulation and location.
10. Lighting fixture schedule with wattage and control narrative.
11. Location of daylight zones on floor plan.
12. Air barrier details including all air barrier boundaries and associated square foot calculations on all six sides of the air barrier as applicable.
C103.2.1 Building thermal envelope depiction. The building's thermal envelope shall be represented on the construction documents.
C103.3 Examination of documents. The code official shall examine or cause to be examined the accompanying construction documents and shall ascertain whether the construction indicated and described is in accordance with the requirements of this code and other pertinent laws or ordinances.
C103.3.1 Approval of construction documents. When the code official issues a permit where construction documents are required, the construction documents shall be endorsed in writing and stamped "Reviewed for Code Compliance." Such approved construction documents shall not be changed, modified or altered without authorization from the code official. Work shall be done in accordance with the approved construction documents.
One set of construction documents so reviewed shall be retained by the code official. The other set shall be returned to the applicant, kept at the site of work and shall be open to inspection by the code official or a duly authorized representative.
C103.3.2 Previous approvals. This code shall not require changes in the construction documents, construction or designated occupancy of a structure for which a lawful permit has been heretofore issued or otherwise lawfully authorized, and the construction of which has been pursued in good faith within 180 days after the effective date of this code and has not been abandoned.
C103.3.3 Phased approval. The code official shall have the authority to issue a permit for the construction of part of an energy conservation system before the construction documents for the entire system have been submitted or approved, provided adequate information and detailed statements have been filed complying with all pertinent requirements of this code. The holders of such permit shall proceed at their own risk without assurance that the permit for the entire energy conservation system will be granted.
C103.4 Amended construction documents. Changes made during construction that are not in compliance with the approved construction documents shall be resubmitted for approval as an amended set of construction documents.
C103.5 Retention of construction documents. One set of approved construction documents shall be retained by the code official for a period of not less than 180 days from date of completion of the permitted work, or as required by state or local laws.
C103.6 Building documentation and close out submittal requirements. The construction documents shall specify that the documents described in this section be provided to the building owner or owner's authorized agent within ((180))a maximum of 90 days of the date of receipt of the certificate of occupancy.
C103.6.1 Record documents. Construction documents shall be updated by the installing contractor and architect or engineer of record to convey a record of the completed work. Such updates shall include building envelope, mechanical, plumbing, electrical and control drawings red-lined, or redrawn if specified, that show all changes to size, type and locations of components, equipment and assemblies. Record documents shall include the location and model number of each piece of equipment as installed. The architect, engineer of record or installing contractor is required to provide consolidated record drawings in compliance with this section to the building owner or owner's authorized agent with the timeline specified in Section C103.6.
C103.6.2 Building operations and maintenance information. Required regular maintenance actions for equipment and systems shall be clearly stated on a readily visible label on the equipment. The label shall include the title or publication number for the operation and maintenance manual for that particular model and type of product and the manufacture date or installation date.
C103.6.2.1 Manuals. An operating and maintenance manual shall be provided for each component, device, piece of equipment, and system governed by this code. The manual shall include all of the following:
1. Submittal data indicating all selected options for each piece of equipment and control devices.
2. Manufacturer's operation manuals and maintenance manuals for each device, piece of equipment, and system requiring maintenance, except equipment not furnished as part of the project. Required routine maintenance actions, cleaning and recommended relamping shall be clearly identified.
3. Name and address of at least one service agency.
4. Controls system inspection schedule, maintenance and calibration information, wiring diagrams, schematics, and control sequence descriptions. A schedule for inspecting and recalibrating all lighting controls. Desired or field-determined setpoints shall be permanently recorded on control drawings at control devices or, for digital control systems, on the graphic where settings may be changed.
5. A narrative of how each system is intended to operate, including recommended setpoints. Sequence of operation alone is not acceptable for this requirement.
C103.6.3 Compliance documentation. All energy code compliance forms and calculations shall be delivered in one document to the building owner as part of the project record documents((,))or manuals, or as a standalone document. This document shall include the specific energy code year utilized for compliance determination for each system. NFRC certificates for the installed windows, list of total area for each NFRC certificate, the interior lighting power compliance path (building area, space-by-space) used to calculate the lighting power allowance.
For projects complying with Section C401.2 Item 1, the documentation shall include:
1. The ((envelop))envelope insulation compliance path (prescriptive or component performance).
2. All completed code compliance forms, and all compliance calculations including, but not limited to, those required by sections C402.1.5, C403.2.12.1, C405.4, and C405.5.
For projects complying with Section C401.2 Item 2, the documentation shall include:
1. A list of all proposed envelope component types, areas and U-values.
2. A list of all lighting area types with areas, lighting power allowance, and installed lighting power density.
3. A list of each HVAC system modeled with the assigned and proposed system type.
4. Electronic copies of the baseline and proposed model input and output file. The input files shall be in a format suitable for rerunning the model and shall not consist solely of formatted reports of the inputs.
C103.6.4 Systems operation training. Training of the maintenance staff for equipment included in the manuals required by Section C103.6.2 shall include at a minimum:
1. Review of manuals and permanent certificate.
2. Hands-on demonstration of all normal maintenance procedures, normal operating modes, and all emergency shutdown and start-up procedures.
3. Training completion report.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-10400Section C104Inspections.
C104.1 General. Construction or work for which a permit is required shall be subject to inspection by the code official((or)), his or her designated agent, or an approved agency, and such construction or work shall remain ((accessible and exposed))visible and able to be accessed for inspection purposes until approved. Approval as a result of an inspection shall not be construed to be an approval of a violation of the provisions of this code or of other ordinances of the jurisdiction. Inspections presuming to give authority to violate or cancel the provisions of this code or of other ordinances of the jurisdiction shall not be valid. It shall be the duty of the permit applicant to cause the work to remain ((accessible and exposed))visible and able to be accessed for inspection purposes. Neither the code official nor the jurisdiction shall be liable for expense entailed in the removal or replacement of any material, product, system or building component required to allow inspection to validate compliance with this code.
C104.2 Required inspections. The code official((or)), his or her designated agent, or an approved agency, upon notification, shall make the inspections set forth in Sections C104.2.1 through C104.2.6.
C104.2.1 Footing and foundation ((inspection))insulation. Inspections ((associated with footings and foundations)) shall verify ((compliance with the code as to))footing and/or foundation insulationR-value, location, thickness, depth of burial and protection of insulation as required by the code ((and)),approved plans and specifications.
C104.2.2 ((Insulation and fenestration inspection.))Thermal envelope. Inspections shall be made before application of interior finish and shall verify ((compliance with the code as to types of insulation and corresponding R-values and their correct location and proper installation; fenestration properties (U-factor, SHGC and VT) and proper installation; and air leakage controls))that envelope components with the correct type of insulation, the R-values, the correct location of insulation, the correct fenestration, the U-factor, SHGC, VT, and air leakage controls are properly installed as required by the code ((and)),approved plans and specifications, including envelope components in future tenant spaces of multitenant buildings.
C104.2.3 Plumbing ((inspection))system. Inspections shall verify ((compliance as required by the code and approved plans and specifications as to types of insulation and corresponding R-values and protection, required controls and required heat traps))the type of insulation, the R-values, the protection required, controls, and heat traps as required by the code, approved plans and specifications.
C104.2.4 Mechanical ((inspection))system. Inspections shall verify ((compliance as required by the code and approved plans and specifications as to))the installed HVAC equipment for the correct type and size, ((required)) controls, duct and piping ((system)) insulation ((and corresponding))R-values, duct system and damper air leakage ((and required energy recovery and/or economizers)), minimum fan efficiency, energy recovery and economizer as required by the code, approved plans and specifications.
C104.2.5 Electrical ((and lighting inspection))system. Inspections shall verify ((compliance as required by the code and approved plans and specifications as to installed)) lighting system((s))controls, components ((and controls;)), meters, motors and installation of an electric meter for each dwelling unit as required by the code, approved plans and specifications.
C104.2.6 Final inspection. The ((building shall have a final inspection and not be occupied until approved))final inspection shall include verification of the installation and proper operation of all required building controls, and documentation verifying activities associated with required building commissioning have been conducted in accordance with Section C408.
C104.3 Reinspection. A building shall be reinspected when determined necessary by the code official.
C104.4 Approved inspection agencies. The code official is authorized to accept reports of approved inspection agencies, provided such agencies satisfy the requirements as to qualifications and reliability relevant to the building components and systems they are inspecting.
C104.5 Inspection requests. It shall be the duty of the holder of the permit or their duly authorized agent to notify the code official when work is ready for inspection. It shall be the duty of the permit holder to provide access to and means for inspections of such work that are required by this code.
C104.6 Reinspection and testing. Where any work or installation does not pass an initial test or inspection, the necessary corrections shall be made so as to achieve compliance with this code. The work or installation shall then be resubmitted to the code official for inspection and testing.
C104.7 Approval. After the prescribed tests and inspections indicate that the work complies in all respects with this code, a notice of approval shall be issued by the code official.
C104.7.1 Revocation. The code official is authorized to, in writing, suspend or revoke a notice of approval issued under the provisions of this code wherever the certificate is issued in error, or on the basis of incorrect information supplied, or where it is determined that the building or structure, premise, or portion thereof is in violation of any ordinance or regulation or any of the provisions of this code.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20201Section C202.1A.
ABOVE-GRADE WALL. A wall enclosing conditioned space that is not a below-grade wall. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts.
((ACCESSIBLE. Admitting close approach as a result of not being guarded by locked doors, elevation or other effective means (see "Readily accessible").))ACCESS (TO). That which enables a device, appliance or equipment to be reached by ready access or by a means that first requires the removal or movement of a panel or similar obstruction.
ADDITION. An extension or increase in the conditioned space floor area, number of stories, or height of a building or structure.
AIR BARRIER.((Material(s) assembled and joined together to provide a barrier to air leakage through the building envelope. An air barrier may be a single material or a combination of materials.))One or more materials joined together in a continuous manner to restrict or prevent the passage of air through the building thermal envelope and its assemblies.
AIR CURTAIN. A device, installed at the building entrance, that generates and discharges a laminar air stream intended to prevent the infiltration of external, unconditioned air into the conditioned spaces, or the loss of interior, conditioned air to the outside.
ALTERATION. Any construction, retrofit or renovation to an existing structure other than repair or addition ((that requires a permit)). Also, a change in a building, electrical, gas, mechanical or plumbing system that involves an extension, addition or change to the arrangement, type or purpose of the original installation ((that requires a permit)).
APPROVED.((Approval by))Acceptable to the code official((as a result of investigation and tests conducted by him or her, or by reason of accepted principles or tests by nationally recognized organizations)).
APPROVED AGENCY. An established and recognized agency regularly engaged in conducting tests or furnishing inspection services, or furnishing product certification research reports, when such agency has been approved by the code official.
ATTIC AND OTHER ROOFS. All other roofs, including roofs with insulation entirely below (inside of) the roof structure (i.e., attics, cathedral ceilings, and single-rafter ceilings), roofs with insulation both above and below the roof structure, and roofs without insulation but excluding roofs with insulation entirely above deck and metal building roofs.
AUTOMATIC. Self-acting, operating by its own mechanism when actuated by some impersonal influence, as, for example, a change in current strength, pressure, temperature or mechanical configuration (see "Manual").
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20202Section C202.2B.
BELOW-GRADE WALL. That portion of a wall in the building envelope that is entirely below the finish grade and in contact with the ground.
BLOCK. A generic concept used in energy simulation. It can include one or more thermal zones. It represents a whole building or portion of a building with the same use type served by the same HVAC system type.
BOILER, MODULATING. A boiler that is capable of more than a single firing rate in response to a varying temperature or heating load.
BOILER SYSTEM. One or more boilers, their piping and controls that work together to supply steam or hot water to heat output devices remote from the boiler.
BUBBLE POINT. The refrigerant liquid saturation temperature at a specified pressure.
BUILDING. Any structure used or intended for supporting or sheltering any use or occupancy, including any mechanical systems, service water heating systems and electric power and lighting systems located on the building site and supporting the building.
BUILDING COMMISSIONING. A process that verifies and documents that the ((selected)) building systems have been ((designed,)) installed((,)) and function according to the ((owner's project requirements and))approved construction documents((, and to minimum code requirements)).
BUILDING ENTRANCE. Any ((door))doorway, set of doors, ((doorway,))revolving door, vestibule or other form of portal that is ordinarily used to gain access to the building ((from the outside by the public))or to exit from the building by its users and occupants. This does not include doors solely used to directly enter mechanical, electrical and other building utility service equipment rooms, or doors for emergency egress only.
BUILDING SITE. A contiguous area of land that is under the ownership or control of one entity.
BUILDING THERMAL ENVELOPE. The below-grade walls, above-grade walls, floors, ceilings, roofs, and any other building element((s))assemblies that enclose conditioned space or provides a boundary between conditioned space, semiheated space and exempt or unconditioned space.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-20203Section C202.3C.
C-FACTOR (THERMAL CONDUCTANCE). The coefficient of heat transmission (surface to surface) through a building component or assembly, equal to the time rate of heat flow per unit area and the unit temperature difference between the warm side and cold side surfaces (Btu/h ft2 x °F) [W/(m2 x K)].
CAPTIVE KEY DEVICE. A lighting control that will not release the key that activates the override when the lighting is on.
CAVITY INSULATION. Insulating material located between framing members.
CERTIFIED COMMISSIONING PROFESSIONAL. An individual who is certified by an ANSI/ISO/IEC 17024:2012 accredited organization to lead, plan, coordinate and manage commissioning teams and implement the commissioning ((processes, or a licensed professional engineer in Washington state))process.
CHANGE OF OCCUPANCY. A change in the use of a building or a portion of a building that results in any of the following:
1. A change of occupancy classification.
2. A change from one group to another group within an occupancy classification.
3. Any change in use within a group for which there is a change in the application of the requirements of this code.
CIRCULATING HOT WATER SYSTEM. A specifically designed water distribution system where one or more pumps are operated in the service hot water piping to circulate heated water from the water-heating equipment to the fixture supply and back to the water-heating equipment.
CLERESTORY FENESTRATION. See "FENESTRATION."
CLIMATE ZONE. A geographical region based on climatic criteria as specified in this code.
CODE OFFICIAL. The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative.
COEFFICIENT OF PERFORMANCE (COP) - COOLING. The ratio of the rate of heat removal to the rate of energy input, in consistent units, for a complete refrigerating system or some specific portion of that system under designated operating conditions.
COEFFICIENT OF PERFORMANCE (COP) - HEATING. The ratio of the rate of heat removal to the rate of heat delivered to the rate of energy input, in consistent units, for a complete heat pump system, including the compressor and, if applicable, auxiliary heat, under designated operating conditions.
COMMERCIAL BUILDING. For this code, all buildings that are not included in the definition of "Residential buildings."
COMPUTER ROOM. A room whose primary function is to house equipment for the processing and storage of electronic data and that has a design ((electronic data))total information technology equipment (ITE) equipment power ((density exceeding))less than or equal to 20 watts per square foot of conditioned area or a design ITE equipment load less than or equal to 10 kW.
CONDENSING UNIT. A factory-made assembly of refrigeration components designed to compress and liquefy a specific refrigerant. The unit consists of one or more refrigerant compressors, refrigerant condensers (air-cooled, evaporatively cooled, or water-cooled), condenser fans and motors (where used) and factory-supplied accessories.
CONDITIONED FLOOR AREA. The horizontal projection of the floors associated with the conditioned space.
CONDITIONED SPACE. An area, room or space that is enclosed within the building thermal envelope and that is directly heated or cooled or that is indirectly heated or cooled. Spaces are indirectly heated or cooled where they communicate through openings with conditioned spaces, where they are separated from conditioned spaces by uninsulated walls, floors or ceilings, or where they contain uninsulated ducts, piping or other sources of heating or cooling.
((CONTINUOUS AIR BARRIER. A combination of materials and assemblies that restrict or prevent the passage of air through the building thermal envelope.))
CONTINUOUS INSULATION (CI). Insulating material that is continuous across all structural members without metal thermal bridges other than fasteners that have a total cross-sectional area not greater than 0.04 percent of the envelope surface through which they penetrate, and service openings. It is installed on the interior or exterior or is integral to any opaque surface of the building envelope.
CONTROLLED PLANT GROWTH ENVIRONMENT. Group F and U buildings or spaces that are specifically controlled to facilitate and enhance plant growth and production by manipulating various indoor ((environment))environmental conditions. Technologies include indoor agriculture, cannabis growing, hydroponics, aquaculture and aquaponics. Controlled indoor environment variables include, but are not limited to, temperature, air quality, humidity, and carbon dioxide.
CURTAIN WALL. Fenestration products used to create an external nonload-bearing wall that is designed to separate the exterior and interior environments.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-20204Section C202.4D.
DATA ACQUISITION SYSTEM. An electronic system managed by the building owner to collect, tabulate and display metering information.
DATA CENTER. A room or series of rooms that share data center systems whose primary function is to house equipment for the processing and storage of electronic data, which has a design total information technology equipment (ITE) power density exceeding 20 watts per square foot of conditioned area and a total design ITE equipment load greater than 10 kW.
DATA CENTER SYSTEMS. HVAC systems, electrical systems, equipment, or portions thereof used to condition ITE or electrical systems in a data center.
DAYLIGHT RESPONSIVE CONTROL. A device or system that provides automatic control of electric light levels based on the amount of daylight in a space.
DAYLIGHT ZONE. The portion of the building interior floor area that is illuminated by natural daylight through ((sidelight and toplight))sidelit and toplit fenestration.
DECORATIVE APPLIANCE, VENTED. A vented appliance wherein the primary function lies in the aesthetic effect of the flames.
DEMAND CONTROL VENTILATION (DCV). A ventilation system capability that provides for the automatic reduction of outdoor air intake below design rates when the actual occupancy of spaces served by the system is less than design occupancy.
DEMAND RECIRCULATION WATER SYSTEM. A water distribution system ((where pumps prime the service hot water piping with heated water upon demand for hot water))having one or more recirculation pumps that pump water from a heated water supply pipe back to the heated water source through a cold water supply pipe.
DOOR, GARAGE. Doors rated by ASMA 105 with a single panel or sectional panels.
DOOR, NONSWINGING. Roll-up, tilt-up, metal coiling and sliding doors, access hatches, and all other doors that are not swinging doors or garage doors with less than or equal to 14 percent glazing.
DOOR, SWINGING. Doors that are hinged on one side and revolving doors.
DUCT. A tube or conduit utilized for conveying air. The air passages of self-contained systems are not to be construed as air ducts.
DUCT SYSTEM. A continuous passageway for the transmission of air that, in addition to ducts, includes duct fittings, dampers, plenums, fans and accessory air-handling equipment and appliances.
DWELLING UNIT. A single unit providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.
DX-DEDICATED OUTDOOR AIR SYSTEM UNITS (DX-DOAS UNITS). A type of air-cooled, water-cooled or water source factory assembled product that dehumidifies 100 percent outdoor air to a low dew point and includes reheat that is capable of controlling the supply dry-bulb temperature of the dehumidified air to the designated supply air temperature. This conditioned outdoor air is then delivered directly or indirectly to the conditioned spaces. It may precondition outdoor air by containing an enthalpy wheel, sensible wheel, desiccant wheel, plate heat exchanger, heat pipes, or other heat or mass transfer apparatus.
DYNAMIC GLAZING. Any fenestration product that has the fully reversible ability to change its performance properties, including U-factor, SHGC, or VT.
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-20205Section C202.5E.
ECONOMIZER, AIR. A duct and damper arrangement and automatic control system that allows a cooling system to supply outside air to reduce or eliminate the need for mechanical cooling during mild or cold weather.
ECONOMIZER, WATER. A system where the supply air of a cooling system is cooled indirectly with water that is itself cooled by heat or mass transfer to the environment without the use of mechanical cooling.
ELECTRICAL LOAD COEFFICIENT (ELC). In a data center, the ratio of the sum of three specific electrical losses (or losses calculated from efficiencies) to the ITE load itself. Specifically, ELC equals the sum of the incoming (to ITE) electrical service losses, UPS losses, and ITE distribution losses all divided by the peak ITE load. The design ELC is calculated at the full load design condition with active redundant equipment engaged, and the annual ELC is calculated the same way because it is assumed that ITE runs constantly at full power all year.
ENCLOSED SPACE. A volume surrounded by solid surfaces such as walls, floors, roofs, and openable devices such as doors and operable windows.
END USE CATEGORY. A load or group of loads that consume energy in a common or similar manner.
ENERGY ANALYSIS. A method for estimating the annual energy use of the proposed design and standard reference design based on estimates of energy use.
ENERGY COST. The total estimated annual cost for purchased energy for the building functions regulated by this code, including applicable demand charges.
ENERGY RECOVERY VENTILATION SYSTEM. Systems that employ air-to-air heat exchangers to recover energy from exhaust air for the purpose of preheating, precooling, humidifying or dehumidifying outdoor ventilation air prior to supplying the air to a space, either directly or as part of an HVAC system.
ENERGY SIMULATION TOOL. An approved software program or calculation-based methodology that projects the annual energy use of a building.
ENERGY SOURCE METER. A meter placed at the source of the incoming energy that measures the energy delivered to the whole building or metered space.
ENTRANCE DOOR.A vertical fenestration product((s)) used for occupant ingress, egress and access in nonresidential buildings including, but not limited to, exterior entrances ((that utilize))utilizing latching hardware and automatic closers and ((contain))containing over 50 percent ((glass))glazing specifically designed to withstand heavy ((use and possibly abuse))duty usage.
EQUIPMENT ROOM. A space that contains either electrical equipment, mechanical equipment, machinery, water pumps or hydraulic pumps that are a function of the building's services.
EXTERIOR WALL. Walls including both above-grade walls and below-grade walls.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20206Section C202.6F.
FAN BRAKE HORSEPOWER (BHP). The horsepower delivered to the fan's shaft. Brake horsepower does not include the mechanical drive losses (belts, gears, etc.).
FAN EFFICIENCY GRADE (FEG). A numerical rating identifying the fan's aerodynamic ability to convert shaft power, or impeller power in the case of a direct-driven fan, to air power.
FAN SYSTEM BHP. The sum of the fan brake horsepower of all fans that are required to operate at fan system design conditions to supply air from the heating or cooling source to the conditioned space(s) and return it to the source or exhaust it to the outdoors.
FAN SYSTEM DESIGN CONDITIONS. Operating conditions that can be expected to occur during normal system operation that result in the highest supply fan airflow rate to conditioned spaces served by the system, other than during air economizer operation.
FAN SYSTEM MOTOR NAMEPLATE HP. The sum of the motor nameplate horsepower of all fans that are required to operate at design conditions to supply air from the heating or cooling source to the conditioned space(s) and return it to the source or exhaust it to the outdoors.
FENESTRATION. Products classified as either skylights or vertical fenestration ((or skylights)).
SKYLIGHTS. Glass or other transparent or translucent glazing material installed at a slope of less than 60 degrees (91.05 rad) from horizontal, including unit skylights, tubular daylighting devices and glazing materials in solariums, sunrooms, roofs and sloped walls.
VERTICAL FENESTRATION. Windows (((fixed or moveable)))that are fixed or operable, ((glazed)) doors((,))with more than 50 percent glazed area and glazed block ((and combination opaque/glazed doors)) composed of glass or other transparent or translucent glazing materials and installed at a slope ((of at least))not less than 60 degrees (91.05 rad) from horizontal. Opaque areas such as spandrel panels are not considered vertical fenestration.
CLERESTORY FENESTRATION. An upper region of vertical fenestration provided for the purpose of admitting daylight beyond the perimeter of a space. The entire clerestory fenestration assembly is installed at a height greater than 8 feet above the finished floor.
FENESTRATION AREA. Total area of the fenestration measured using the rough opening, and including the glazing, sash and frame.
FENESTRATION PRODUCT, FIELD-FABRICATED. A fenestration product whose frame is made at the construction site of standard dimensional lumber or other materials that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a fenestration product or exterior door. Field fabricated does not include site-built fenestration.
FENESTRATION PRODUCT, SITE-BUILT. A fenestration designed to be made up of field-glazed or field-assembled units using specific factory cut or otherwise factory-formed framing and glazing units. Examples of site-built fenestration include storefront systems, curtain walls, and atrium roof systems.
F-FACTOR. The perimeter heat loss factor for slab-on-grade floors (Btu/h x ft x °F) [W/(m x K)].
FLOOR AREA, NET. The actual occupied area not including unoccupied accessory areas such as corridors, stairways, toilet rooms, mechanical rooms and closets.
FURNACE ELECTRICITY RATIO. The ratio of furnace electricity use to total furnace energy computed as ratio = (3.412 x EAE)/1000 x EF + 3.412 x EAE) where EAE (average annual auxiliary electrical consumption) and EF (average annual fuel energy consumption) are defined in Appendix N to Subpart B of Part 430 of Title 10 of the Code of Federal Regulations and EF is expressed in millions of Btus per year.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20207Section C202.7G.
GENERAL LIGHTING. Lighting that provides a substantially uniform level of illumination throughout an area. General lighting shall not include lighting that provides a dissimilar level of illumination to serve a specific application or decorative feature within such area.
((GENERAL PURPOSE ELECTRIC MOTOR (SUBTYPE I). A motor that is designed in standard ratings with either of the following:
1. Standard operating characteristics and standard mechanical construction for use under usual service conditions, such as those specified in NEMA MG1, paragraph 14.02, "Usual Service Conditions," and without restriction to a particular application or type of application.
2. Standard operating characteristics or standard mechanical construction for use under unusual service conditions, such as those specified in NEMA MG1, paragraph 14.03, "Unusual Service Conditions," or for a particular type of application, and that can be used in most general purpose applications.
General purpose electric motors (Subtype I) are constructed in NEMA T-frame sizes or IEC metric equivalent, starting at 143T.
GENERAL PURPOSE ELECTRIC MOTOR (SUBTYPE II). A motor incorporating the design elements of a general purpose electric motor (Subtype I) that is configured as one of the following:
1. A U-frame motor.
2. A Design C motor.
3. A close-coupled pump motor.
4. A footless motor.
5. A vertical, solid-shaft, normal-thrust motor (as tested in a horizontal configuration).
6. An 8-pole motor (900 rpm).
7. A polyphase motor with voltage of not more than 600 volts (other than 230 or 460 volts).))
GREENHOUSE. A permanent structure or a thermally isolated area of a building that maintains a specialized sunlit environment that is used exclusively for, and is essential to, the cultivation, protection or maintenance of plants. Greenhouses are those that are erected for a period of 180 days or more.
GROUP R. Buildings or portions of buildings that contain any of the following occupancies as established in the International Building Code:
1. Group R-1.
2. Group R-2 where located more than three stories in height above grade plane.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20208Section C202.8H.
HEAT TRAP. An arrangement of piping and fittings, such as elbows, or a commercially available heat trap that prevents thermosyphoning of hot water during standby periods.
HEAT TRAP, PIPE CONFIGURED. A pipe configured heat trap is either, as applicable:
1. A device specifically designed for the purpose or an arrangement of tubing that forms a loop of 360 degrees; or
2. Piping that from the point of connection to the water heater (inlet or outlet) includes a length of piping directed downward before connection to the vertical piping of the supply water or hot-water distribution system.
HEATED SLAB-ON-GRADE FLOOR. Slab-on-grade floor construction in which the heating elements, hydronic tubing, or hot air distribution system is in contact with, or placed within or under, the slab.
HEATED WATER CIRCULATION SYSTEM. A water distribution system having one or more recirculation pumps that pump water from a heated water source through a dedicated hot water circulation pipe or piping system.
HIGH SPEED DOOR. A nonswinging door used primarily to facilitate vehicular access or material transportation, with a minimum opening rate of 32 inches (813 mm) per second, a minimum closing rate of 24 inches (610 mm) per second and that includes an automatic-closing device.
HISTORIC BUILDINGS. Buildings that are listed in or eligible for listing in the National Register of Historic Places, or designated as historic under an appropriate state or local law.
HUMIDISTAT. A regulatory device, actuated by changes in humidity, used for automatic control of relative humidity.
HVAC TOTAL SYSTEM PERFORMANCE RATIO (HVAC TSPR). The ratio of the sum of a building's annual heating and cooling load in thousands of Btus to the sum of annual carbon emissions in pounds from energy consumption of the building HVAC systems. Carbon emissions shall be calculated by multiplying site energy consumption by the carbon emission factors from Table C407.1.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20209Section C202.9I.
IEC DESIGN H MOTOR. An electric motor that meets all of the following:
1. It is an induction motor designed for use with three-phase power.
2. It contains a cage rotor.
3. It is capable of direct-on-line starting.
4. It has 4, 6 or 8 poles.
5. It is rated from 0.4 kW to 1600 kW at a frequency of 60 Hz.
IEC DESIGN N MOTOR. An electric motor that meets all of the following:
1. It is an inductor motor designed for use with three-phase power.
2. It contains a cage rotor.
3. It is capable of direct-on-line starting.
4. It has 2, 4, 6 or 8 poles.
5. It is rated from 0.4 kW to 1600 kW at a frequency of 60 Hz.
INFILTRATION. The uncontrolled inward air leakage into a building caused by the pressure effects of wind or the effect of differences in the indoor and outdoor air density or both.
INFORMATION TECHNOLOGY EQUIPMENT (ITE). ITE includes computers, data storage, servers and network/communications equipment.
INSULATION ENTIRELY ABOVE DECK. A roof with all insulation:
1. Installed above (outside of) the roof structure; and
2. Continuous (i.e., uninterrupted by framing members).
INTEGRATED ENERGY EFFICIENCY RATIO (IEER). A single-number figure of merit expressing cooling part-load EER efficiency for unitary air-conditioning and heat pump equipment on the basis of weighted operation at various load capacities for the equipment.
INTEGRATED PART LOAD VALUE (IPLV). A single number figure of merit based on part-load EER, COP, or kW/ton expressing part-load efficiency for air conditioning and heat pump equipment on the basis of weighted operation at various load capacities for equipment.
INTEGRATED SEASONAL COEFFICIENT OF PERFORMANCE (ISCOP). A seasonal efficiency number that is a combined value based on the formula listed in AHRI Standard 920 of the two COP values for the heating season of a DX-DOAS unit water or air source heat pump, expressed in W/W.
INTEGRATED SEASONAL MOISTURE REMOVAL EFFICIENCY (ISMRE). A seasonal efficiency number that is a combined value based on the formula listed in AHRI Standard 920 of the four dehumidification moisture removal efficiency (MRE) ratings required for DX-DOAS units, expressed in lb. of moisture/kWh.
ISOLATION DEVICES. Devices that isolate HVAC zones so they can be operated independently of one another. Isolation devices include separate systems, isolation dampers and controls providing shutoff at terminal boxes.
AMENDATORY SECTION(Amending WSR 17-10-062, filed 5/2/17, effective 6/2/17)
WAC 51-11C-20212Section C202.12L.
LABELED. Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, ((inspection))approvedagency or other organization concerned with product evaluation that maintains periodic inspection of the production of the above-labeled items and whose labeling indicates either that the equipment, material or product meets identified standards or has been tested and found suitable for a specified purpose.
LINER SYSTEM (LS). A system that includes the following:
1. A continuous vapor barrier liner membrane that is installed below the purlins and that is uninterrupted by framing members.
2. An uncompressed, unfaced insulation resting on top of the liner membrane and located between the purlins.
For multilayer installations, the last rated R-value of insulation is for unfaced insulation draped over purlins and then compressed when the metal roof panels are attached.
LISTED. Equipment, materials, products or services included in a list published by an organization acceptable to the code official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specified purpose.
LOW-SLOPED ROOF. A roof having a slope less than 2 units vertical in 12 units horizontal.
LOW-VOLTAGE DRY-TYPE DISTRIBUTION TRANSFORMER. A transformer that is air-cooled, does not use oil as a coolant, has an input voltage less than or equal to 600 volts and is rated for operation at a frequency of 60 hertz.
LOW-VOLTAGE LIGHTING. A lighting system consisting of an isolating power supply, the low voltage luminaires, and associated equipment that are all identified for the use. ((The output circuits of the power supply operate at 30 volts (42.4 volts peak) or less under all load conditions.))
LUMINAIRE. A complete lighting unit consisting of a lamp or lamps together with the housing designed to distribute the light, position and protect the lamps, and connect the lamps to the power supply.
LUMINAIRE-LEVEL LIGHTING CONTROL. A lighting system consisting of one or more ((luminaire(s) each with))luminaires where each luminaire has embedded lighting control logic, occupancy and ambient light sensors, ((local or central wireless networking capabilities,)) and local override switching capability, where required. Each luminaire shall also have wireless networking capabilities to detect and share information with other luminaires to adjust to occupancy and/or daylight in the space.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20213Section C202.13M.
MANUAL. Capable of being operated by personal intervention (see "Automatic").
MASS TRANSFER DECK SLAB EDGE. That portion of the above-grade wall made up of the concrete slab where it extends past the footprint of the floor above, and there is space (conditioned or unconditioned) below the slab. The area of the slab edge shall be defined as the thickness of the slab multiplied by the perimeter of the edge condition. Examples of this condition include, but are not limited to, the transition from an above-grade structure to a below-grade structure or the transition from a tower to a podium. Cantilevered balconies do not meet this definition.
MECHANICAL COOLING. Reducing the temperature of a gas or liquid by using vapor compression, absorption, desiccant dehumidification combined with evaporative cooling, or another energy-driven thermodynamic cycle. Indirect or direct evaporative cooling alone is not considered mechanical cooling.
MECHANICAL HEATING. Raising the temperature of a gas or liquid by use of fossil fuel burners, electric resistance heaters, heat pumps, or other systems that require energy to operate.
MECHANICAL LOAD COEFFICIENT (MLC). In a data center, the ratio of the cooling system's net use of energy to that of the ITE. The design MLC is calculated for a local peak weather condition (stipulated in ASHRAE Standard 90.4) and equals the sum of all active cooling equipment input power, divided by total power into the ITE. The annual MLC is calculated using hourly TMY3 weather data for the data center's location and equals the sum of all energy flowing into the cooling system to respond to that weather, minus any energy successfully recovered to avoid any new energy use, all divided by the energy flowing into the ITE during the same period.
METAL BUILDING ROOF. A roof that:
1. Is constructed with a metal, structural, weathering surface;
2. Has no ventilated cavity; and
3. Has the insulation entirely below deck (i.e., does not include composite concrete and metal deck construction nor a roof framing system that is separated from the superstructure by a wood substrate) and whose structure consists of one or more of the following configurations:
a. Metal roofing in direct contact with the steel framing members;
b. Metal roofing separated from the steel framing members by insulation;
c. Insulated metal roofing panels installed as described in a or b.
METAL BUILDING WALL. A wall whose structure consists of metal spanning members supported by steel structural members (i.e., does not include spandrel glass or metal panels in curtain wall systems).
METER. A device that measures the flow of energy.
MICROCELL. A wireless communication facility consisting of an antenna that is either: (a) Four (4) feet in height and with an area of not more than 580 square inches; or (b) if a tubular antenna, no more than four (4) inches in diameter and no more than six (6) feet in length; and the associated equipment cabinet that is six (6) feet or less in height and no more than 48 square feet in floor area.
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-20214Section C202.14N.
NAMEPLATE HORSEPOWER. The nominal motor ((horsepower))output power rating stamped on the motor nameplate.
NEMA DESIGN A MOTOR. A squirrel-cage motor that meets all of the following:
1. It is designed to withstand full-voltage starting and developing locked-rotor torque as shown in paragraph 12.38.1 of NEMA MG 1.
2. It has pull-up torque not less than the values shown in paragraph 12.40.1 of NEMA MG 1.
3. It has breakdown torque not less than the values shown in paragraph 12.39.1 of NEMA MG 1.
4. It has a locked-rotor current higher than the values shown in paragraph 12.35.1 of NEMA MG 1 for 60 Hz and paragraph 12.35.2 of NEMA MG 1 for 50 Hz.
5. It has a slip at rated load of less than 5 percent for motors with fewer than 10 poles.
NEMA DESIGN B MOTOR. A squirrel-cage motor that meets all of the following:
1. It is designed to withstand full-voltage starting.
2. It develops locked-rotor, breakdown and pull-up torques adequate for general application as specified in Sections 12.38, 12.39 and 12.40 of NEMA MG 1.
3. It draws locked-rotor current not to exceed the values shown in paragraph 12.35.1 of NEMA MG 1 for 60 Hz and paragraph 12.35.2 of NEMA MG 1 for 50 Hz.
4. It has a slip at rated load of less than 5 percent for motors with fewer than 10 poles.
NEMA DESIGN C MOTOR. A squirrel-cage motor that meets all of the following:
1. It is designed to withstand full-voltage starting and developing locked-rotor torque for high-torque applications up to the values shown in paragraph 12.38.2 of NEMA MG 1 (incorporated by reference; see Sec. 431.15).
2. It has pull-up torque not less than the values shown in paragraph 12.40.2 of NEMA MG 1.
3. It has breakdown torque not less than the values shown in paragraph 12.39.2 of NEMA MG 1.
4. It has a locked-rotor current not to exceed the values shown in paragraph 12.35.1 of NEMA MG 1 for 60 Hz and paragraph 12.35.2 of NEMA MG 1 for 50 Hz.
5. It has a slip at rated load of less than 5 percent.
NETWORKED GUEST ROOM CONTROL SYSTEM.  A control system, accessible from the front desk or other central location associated with a Group R-1 building, that is capable of identifying the occupancy status of each guest room according to a timed schedule, and is capable of controlling HVAC in each hotel and motel guest room separately.
NONSTANDARD PART LOAD VALUE (NPLV). A single-number part-load efficiency figure of merit calculated and referenced to conditions other than IPLV conditions, for units that are not designed to operate at ARI standard rating conditions.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20215Section C202.15O.
OCCUPANT SENSOR CONTROL. An automatic control device or system that detects the presence or absence of people within an area and causes lighting, equipment or appliances to be regulated accordingly.
ON-SITE RENEWABLE ENERGY. Energy derived from solar radiation, wind, waves, tides, landfill gas, biogas, biomass, or the internal heat of the earth. The energy system providing on-site renewable energy shall be located on the project site.
OPAQUE DOOR. A door that is not less than 50 percent opaque in surface area.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20216Section C202.16P.
PERSONAL WIRELESS SERVICE FACILITY. A wireless communication facility (WCF), including a microcell, which is a facility for the transmission and/or reception of radio frequency signals and which may include antennas, equipment shelter or cabinet, transmission cables, a support structure to achieve the necessary elevation, and reception and/or transmission devices or antennas.
POWERED ROOF/WALL VENTILATORS. A fan consisting of a centrifugal or axial impeller with an integral driver in a weather-resistant housing and with a base designed to fit, usually by means of a curb, over a wall or roof opening.
POWER-OVER-ETHERNET LIGHTING (POE). Lighting sources powered by DC current utilizing Ethernet cables.
PROPOSED DESIGN. A description of the proposed building used to estimate annual energy use and carbon emissions from energy consumption for determining compliance based on total building performance and HVAC total performance ratio.
PUBLIC LAVATORY FAUCET. A lavatory faucet that is not intended for private use as defined by the Uniform Plumbing Code and that is supplied with both potable cold and hot water.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20218Section C202.18R.
RADIANT HEATING SYSTEM. A heating system that transfers heat to objects and surfaces within a conditioned space, primarily by infrared radiation.
((READILY ACCESSIBLE. Capable of being reached quickly for operation, renewal or inspection without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders or access equipment (see "Accessible").))READY ACCESS (TO). That which enables a device, appliance or equipment to be directly reached, without requiring the removal or movement of any panel or similar obstruction.
REFRIGERANT DEW POINT. The refrigerant vapor saturation temperature at a specified pressure.
REFRIGERATED WAREHOUSE COOLER. An enclosed storage space that has a total chilled storage area of 3,000 ft2 or greater and is designed to maintain a temperature of greater than 32°F but less than 55°F.
REFRIGERATED WAREHOUSE FREEZER. An enclosed storage space that has a total chilled storage area of 3,000 ft2 or greater and is designed to maintain a temperature at or below 32°F.
REFRIGERATION SYSTEM, LOW TEMPERATURE. Systems for maintaining food product in a frozen state in refrigeration applications.
REFRIGERATION SYSTEM, MEDIUM TEMPERATURE. Systems for maintaining food product above freezing in refrigeration applications.
REGISTERED DESIGN PROFESSIONAL. An individual who is registered or licensed to practice their respective design profession as defined by the statutory requirements of the professional registration laws of the state or jurisdiction in which the project is to be constructed.
REPAIR. The reconstruction or renewal of any part of an existing building.
REPLACEMENT AIR. Outdoor air that is used to replace air removed from a building through an exhaust system. Replacement air may be derived from one or more of the following: Make-up air, supply air, transfer air and infiltration. However, the ultimate source of all replacement air is outdoor air. When replacement air exceeds exhaust, the result is exfiltration.
REROOFING. The process of recovering or replacing an existing roof covering. See "Roof Recover" and "Roof Replacement."
RESIDENTIAL BUILDING. For this code, includes detached one- and two-family dwellings and multiple single-family dwellings (townhouses) as well as Group R-2((, R-3 and R-4))and R-3 buildings three stories or less in height above grade plane.
ROOF ASSEMBLY. A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof covering, underlayment, roof deck, insulation, vapor retarder and interior finish. See also attic and other roofs, metal building roof, roof with insulation entirely above deck and single-rafter roof.
ROOF RECOVER. The process of installing an additional roof covering over a prepared existing roof covering without removing the existing roof covering.
ROOF REPAIR. Reconstruction or renewal of any part of an existing roof for the purposes of its maintenance.
ROOF REPLACEMENT. The process of removing the existing roof covering, repairing any damaged substrate and installing a new roof covering.
ROOFTOP MONITOR. A raised section of a roof containing vertical fenestration along one or more sides.
R-VALUE (THERMAL RESISTANCE). The inverse of the time rate of heat flow through a body from one of its bounding surfaces to the other surface for a unit temperature difference between the two surfaces, under steady state conditions, per unit area (h • ft2 • °F/Btu) [(m2 • K)/W].
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20219Section C202.19S.
SATURATED-CONDENSING TEMPERATURE. The saturation temperature corresponding to the measured refrigerant pressure at the condenser inlet for single component and azeotropic refrigerants, and the arithmetic average of the dew point and bubble point temperatures corresponding to the refrigerant pressure at the condenser entrance for zeotropic refrigerants.
((SCREW LAMP HOLDERS. A lamp base that requires a screw-in-type lamp, such as a compact-fluorescent, incandescent, or tungsten-halogen bulb.))
SEMI-HEATED SPACE. An enclosed space within a building, including adjacent connected spaces separated by an uninsulated component (e.g., basements, utility rooms, garages, corridors), which:
1. Is heated but not cooled, and has ((a maximum))an installed heating system output capacity ((of))greater than or equal to 3.4 Btu/(h-ft2) but not greater than 8 Btu/(h-ft2);
2. Is not a walk-in or warehouse cooler or freezer space.
SENSIBLE RECOVERY EFFECTIVENESS. Change in the dry-bulb temperature of the outdoor air supply divided by the difference between the outdoor air and return air dry-bulb temperatures, expressed as a percentage, governed by AHRI Standard 1060.
SERVICE WATER HEATING. Heating water for domestic or commercial purposes other than space heating and process requirements.
SIDELIT. See Section C405.2.4.2.
SINGLE-RAFTER ROOF. A roof where the roof above and the ceiling below are both attached to the same wood rafter and where insulation is located in the space between these wood rafters.
SKYLIGHT. See "Fenestration."
SLAB BELOW GRADE. Any portion of a slab floor in contact with the ground which is more than 24 inches below the final elevation of the nearest exterior grade.
SLAB-ON-GRADE FLOOR. That portion of a slab floor of the building envelope that is in contact with the ground and that is either above grade or is less than or equal to 24 inches below the final elevation of the nearest exterior grade.
SLEEPING UNIT. A room or space in which people sleep, which can also include permanent provisions for living, eating, and either sanitation or kitchen facilities but not both. Such rooms and spaces that are also part of a dwelling unit are not sleeping units.
SMALL ELECTRIC MOTOR. A general purpose, alternating current, single speed induction motor.
SMALL BUSINESS. Any business entity (including a sole proprietorship, corporation, partnership or other legal entity) which is owned and operated independently from all other businesses, which has the purpose of making a profit, and which has fifty or fewer employees.
SOLAR HEAT GAIN COEFFICIENT (SHGC). The ratio of the solar heat gain entering the space through the fenestration assembly to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation which is then reradiated, conducted or convected into the space.
SPACE CONDITIONING CATEGORY. Categories are based on the allowed peak space conditioning output capacity per square foot of conditioned floor area, or the design set point temperature, for a building or space. Space conditioning categories include: Low energy, semi-heated, conditioned, refrigerated walk-in and warehouse coolers, and refrigerated walk-in and warehouse freezers.
STANDARD REFERENCE DESIGN. A version of the proposed design that meets the minimum requirements of this code and is used to determine the maximum annual energy use requirement and carbon emissions from energy consumption for compliance based on total building performance and HVAC total system performance ratio.
STEEL-FRAMED WALL. A wall with a cavity (insulated or otherwise) whose exterior surfaces are separated by steel framing members (i.e., typical steel stud walls and curtain wall systems).
STOREFRONT. A ((nonresidential)) system of doors and windows mulled as a composite fenestration structure that has been designed to resist heavy use. Storefront systems include, but are not limited to, exterior fenestration systems that span from the floor level or above to the ceiling of the same story on commercial buildings, with or without mulled windows and doors.
SUBSYSTEM METER. A meter placed downstream of the energy supply meter that measures the energy delivered to a load or a group of loads.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20220Section C202.20T.
TEMPORARY GROWING STRUCTURE. A temporary growing structure has sides and roof covered with polyethylene, polyvinyl or similar flexible synthetic material and is used to provide plants with either frost protection or increased heat retention. Temporary structures are those that are erected for a period of less than 180 days.
THERMOSTAT. An automatic control device used to maintain temperature at a fixed or adjustable set point.
TIME SWITCH CONTROL. An automatic control device or system that controls lighting or other loads, including switching off, based on time schedules.
TOPLIT. See Section C405.2.4.3.
TUBULAR DAYLIGHTING DEVICE (TDD). A nonoperable skylight device primarily designed to transmit daylight from a roof surface to an interior ceiling surface via a tubular conduit. The device consists of an exterior glazed weathering surface, a light transmitting tube with a reflective inside surface and an interior sealing device, such as a translucent ceiling panel.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-20222Section C202.22V.
VARIABLE REFRIGERANT FLOW SYSTEM. An engineered direct-expansion (DX) refrigerant system that incorporates a common condensing unit, at least one variable capacity compressor, a distributed refrigerant piping network to multiple indoor fan heating and cooling units each capable of individual zone temperature control, through integral zone temperature control devices and a common communications network. Variable refrigerant flow utilizes three or more steps of control on common interconnecting piping.
VENTILATION. The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, any space.
VENTILATION AIR. That portion of supply air that comes from outside (outdoors) plus any recirculated air that has been treated to maintain the desired quality of air within a designated space.
VERTICAL FENESTRATION. See "FENESTRATION."
VISIBLE TRANSMITTANCE [VT]. The ratio of visible light entering the space through the fenestration product assembly to the incident visible light, visible transmittance, includes the effects of glazing material and frame and is expressed as a number between 0 and 1. For skylights, VT shall be measured and rated in accordance with NFRC 202.
VISIBLE TRANSMITTANCE - ANNUAL [VT-ANNUAL]. The ratio of visible light entering the space through the fenestration product assembly to the incident visible light during the course of a year, visible transmittance, which includes the effects of glazing material, frame, and light well or tubular conduit, and is expressed as a number between 0 and 1. For tubular daylighting devices, VT-annual shall be measured and rated in accordance with NFRC 203.
VOLTAGE DROP. A decrease in voltage caused by losses in the wiring system that connect the power source to the load.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-30310Section 303.1Identification.
C303.1 Identification. Materials, systems and equipment shall be identified in a manner that will allow a determination of compliance with the applicable provisions of this code.
C303.1.1 Building thermal envelope insulation. An R-value identification mark shall be applied by the manufacturer to each piece of building thermal envelope insulation 12 inches (305 mm) or greater in width. Alternately, the insulation installers shall provide a certification listing the type, manufacturer and R-value of insulation installed in each element of the building thermal envelope. For blown or sprayed insulation (fiberglass and cellulose), the initial installed thickness, settled thickness, settled R-value, installed density, coverage area and number of bags installed shall be listed on the certification. For sprayed polyurethane foam (SPF) insulation, the installed thickness of the areas covered and R-value of installed thickness shall be listed on the certification. For insulated siding, the R-value shall be labeled on the product's package and shall be listed on the certification. The insulation installer shall sign, date and post the certification in a conspicuous location on the job site.
EXCEPTION:
For roof insulation installed above the deck, the R-value shall be labeled as required by the material standards specified in Table 1508.2 of the International Building Code.
C303.1.1.1 Blown or sprayed roof/ceiling insulation. The thickness of blown-in or sprayed fiberglass and cellulose roof/ceiling insulation (((fiberglass or cellulose))) shall be written in inches (mm) on markers ((that are installed at least one)) for every 300 square feet (28 m2) of attic area throughout the attic space. The markers shall be affixed to the trusses or joists and marked with the minimum initial installed thickness with numbers of not less than 1 inch (25 mm) in height. Each marker shall face the attic access opening. Spray polyurethane foam thickness and installed R-value shall be listed on certification provided by the insulation installer.
C303.1.2 Insulation mark installation. Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable upon inspection.
C303.1.3 Fenestration product rating.U-factors of fenestration ((products (windows, doors and skylights))) shall be determined ((in accordance with NFRC 100.
EXCEPTION:
Where required, garage door U-factors shall be determined in accordance with either NFRC 100 or ANSI/DASMA 105.))
as follows:
1. For windows, doors and skylights, U-factor ratings shall be determined in accordance with NFRC 100.
2. Where required for garage doors and rolling doors, U-factor ratings shall be determined in accordance with either NFRC 100 or ANSI/DASMA 105.
U-factors shall be determined by an accredited, independent laboratory, and labeled and certified by the manufacturer.
Products lacking such a labeled U-factor shall be assigned a default U-factor from Table C303.1.3(1), C303.1.3(2) or C303.1.3(4). The solar heat gain coefficient (SHGC) and visible transmittance (VT) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled SHGC or VT shall be assigned a default SHGC or VT from Table C303.1.3(3).
EXCEPTION:
Units without NFRC ratings produced by a small business may be assigned default U-factors from Table C303.1.3(5) for vertical fenestration.
C303.1.4 Insulation product rating. The thermal resistance (R-value) of insulation shall be determined in accordance with the U.S. Federal Trade Commission R-value rule (C.F.R. Title 16, Part 460) in units of h x ft2 x °F/Btu at a mean temperature of 75°F (24°C).
C303.1.4.1 Insulated siding. The thermal resistance (R-Value) shall be determined in accordance with ASTM C1363. Installation for testing shall be in accordance with the manufacturer's installation instructions.
C303.1.5 Spandrel panels in glass curtain walls. Table C303.1.5 provides default U-factors for the spandrel section of glass and other curtain wall systems. Design factors that affect performance are the type of framing, the type of spandrel panel and the R-value of insulation. Four framing conditions are considered in the table. The first is the common case where standard aluminum mullions are used. Standard mullions provide a thermal bridge through the insulation, reducing its effectiveness. The second case is for metal framing members that have a thermal break. A thermal break frame uses a urethane or other nonmetallic element to separate the metal exposed to outside conditions from the metal that is exposed to interior conditions. The third case is for structural glazing or systems where there are no exposed mullions on the exterior. The fourth case is for the condition where there is no framing or the insulation is continuous and uninterrupted by framing. The columns in the table can be used for any specified level of insulation between framing members installed in framed curtain walls or spandrel panels.
C303.1.5.1 Window wall application. Where "window wall" or similar assembly that is discontinuous at intermediate slab edges is used, the slab edge U-value shall be as listed in Appendix Table A103.3.7.1(3) or as determined using an approved calculation.
C303.1.5.2 Table value assumptions. In addition to the spandrel panel assembly, the construction assembly U-factors assume an air gap between the spandrel panel (with an R-value of 1.39) and one layer of 5/8-inch gypsum board (with an R-value of 0.56) that provides the interior finish. The gypsum board is assumed to span between the window sill and a channel at the floor. For assemblies that differ from these assumptions, custom U-factors can be calculated to account for any amount of continuous insulation or for unusual construction assemblies using Equations 3-1, 3-2 or 3-3 where appropriate. Spandrel panel U-factors for assemblies other than those covered by Table C303.1.5 or Equations 3-1 through 3-3 may be determined using an alternate approved methodology. Equations 3-1 through 3-3 do not calculate the value of any insulation inboard of the curtain wall assembly.
Aluminum without Thermal Break
(Equation 3-1)
Aluminum with Thermal Break
(Equation 3-2)
Structural Glazing
(Equation 3-3)
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-303131Table C303.1.3(1)Default glazed ((fenestration))window, glass door and skylightU-factors.
Table C303.1.3(1)
Default Glazed ((Fenestration))Window, Glass Door and SkylightU-Factors
 
Window and Glass Door
 
FRAME TYPE
SINGLE PANE
DOUBLE PANE
SKY-LIGHT
Metal
1.20
0.80
 
Metal with Thermal Break
1.10
0.65
See Table
C303.1.3(4)
Nonmetal or Metal Clad
0.95
0.55
 
Glazed Block
0.60
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-303132Table C303.1.3(2)Default door U-factors.
Table C303.1.3(2)
Default Opaque Door U-Factors
See Appendix A, Section A107
NEW SECTION
WAC 51-11C-30315Table C303.1.5U-factors for spandrel panels and glass curtain walls.
Table C303.1.5
U-Factors for Spandrel Panels and Glass Curtain Walls
 
 
Rated R-Value of Insulation Between Framing Members
None
R-4
R-7
R-10
R-15
R-20
R-25
R-30
Frame Type
Spandrel Panel
 
A
B
C
D
E
F
G
H
Aluminum without Thermal Break
Single glass pane, stone or metal panel
1
0.360
0.242
0.222
0.212
0.203
0.198
0.195
0.193
Double glass with no low-e coatings
2
0.297
0.233
0.218
0.209
0.202
0.197
0.194
0.192
Triple or low-e glass
3
0.267
0.226
0.214
0.207
0.200
0.196
0.194
0.192
Aluminum with Thermal Break
Single glass pane, stone or metal panel
4
0.350
0.211
0.186
0.173
0.162
0.155
0.151
0.149
Double glass with no low-e coatings
5
0.278
0.200
0.180
0.170
0.160
0.154
0.151
0.148
Triple or low-e glass
6
0.241
0.191
0.176
0.167
0.159
0.153
0.150
0.148
Structural Glazing
Single glass pane, stone or metal panel
7
0.354
0.195
0.163
0.147
0.132
0.123
0.118
0.114
Double glass with no low-e coatings
8
0.274
0.180
0.156
0.142
0.129
0.122
0.117
0.114
Triple or low-e glass
9
0.231
0.169
0.150
0.138
0.127
0.121
0.116
0.113
No Framing, or Insulation is Continuous
Single glass pane, stone or metal panel
10
0.360
0.148
0.102
0.078
0.056
0.044
0.036
0.031
Double glass with no low-e coatings
11
0.297
0.136
0.097
0.075
0.054
0.043
0.035
0.030
Triple or low-e glass
12
0.267
0.129
0.093
0.073
0.053
0.042
0.035
0.030
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-30320Section C303.2Installation.
C303.2 Installation. Materials, systems and equipment shall be installed in accordance with the manufacturer's instructions and the International Building Code.
C303.2.1 Protection of exposed foundation insulation. Insulation applied to the exterior of basement walls, crawlspace walls and the perimeter of slab-on-grade floors shall have a rigid, opaque and weather-resistant protective covering to prevent the degradation of the insulation's thermal performance. The protective covering shall cover the exposed exterior insulation and extend not less than 6 inches (153 mm) below grade.
C303.2.2 Multiple layers of continuous insulation. Where two or more layers of continuous insulation board are used in a construction assembly, the continuous insulation boards shall be installed in accordance with Section C303.2. Where the continuous insulation board manufacturer's instructions do not address installation of two or more layers, the edge joints between each layer of continuous insulation boards shall be staggered.
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-30330((Section C303.3—Maintenance information.))Reserved.
((C303.3 Maintenance information. Maintenance instructions shall be furnished for equipment and systems that require preventive maintenance. Required regular maintenance actions shall be clearly stated and incorporated on a readily accessible label. The label shall include the title or publication number for the operation and maintenance manual for that particular model and type of product.))
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40100Section C401General.
C401.1 Scope. The provisions in this chapter are applicable to commercial buildings and their building sites.
C401.2 Application. Commercial buildings shall comply with one of the following:
1. The requirements of Sections C402, C403, C404, C405, C406, C408, C409 ((and)), C410, and C411.
2. The requirements of Section C407((, C408, C409, C410, C402.5, C403.2, C404, C405.2, C405.3, C405.4, C405.6 and C405.7. The building energy consumption shall be equal to or less than 87, 90, or 93 percent of the standard reference design building, depending on the option selected per Section C407.3)).
3. When adopted by the local jurisdiction, the requirements of Appendix F, Outcome-Based Energy Budget, Sections C408, C409, C410, C411 and any specific sections in Table C407.2 as determined by the local jurisdiction. The Proposed Total UA of the proposed building shall be no more than 20 percent higher than the Allowed Total UA as defined in Section C402.1.5.
C401.2.1 Application to existing buildings. Work on existing buildings shall comply with Chapter 5 in addition to the applicable provisions of Chapter 4.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40210Section C402.1General (Prescriptive).
C402.1 General (((Prescriptive))). Building thermal envelope assemblies for buildings that are intended to comply with the code on a prescriptive basis, in accordance with the compliance path described in Item 1 of Section C401.2, shall comply with the following:
1. The opaque portions of the building thermal envelope shall comply with the specific insulation requirements of Section C402.2 and the thermal requirements of either the R-value based method of Section C402.1.3, the U-, C- and F-factor based method of Section C402.1.4, or the component performance alternative of Section C402.1.5.
2. Fenestration in building envelope assemblies shall comply with Section C402.4, or the component performance alternative of Section C402.1.5.
3. Air leakage of building envelope assemblies shall comply with Section C402.5.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40211Section C402.1.1Low energy buildings.
C402.1.1Low energy buildings, semi-heated buildings and greenhouses. Low energy buildings shall comply with Section C402.1.1.1. Semi-heated buildings and spaces shall comply with Section C402.1.1.2. Greenhouses shall comply with Section C402.1.1.3.
C402.1.1.1 Low energy buildings. The following buildings, or portions thereof, separated from the remainder of the building by building thermal envelope assemblies complying with this code shall be exempt from all thermal envelope provision of this code:
1. Those that are heated and/or cooled with a peak design rate of energy usage less than 3.4 Btu/h × ft2 (10.7 W/m2) or 1.0 watt/ft2 (10.7 W/m2) of floor area for space conditioning purposes.
2. Those that do not contain conditioned space.
3. ((Greenhouses where cooling does not include a condensing unit and that are isolated from any other conditioned space.
4.)) Unstaffed equipment shelters or cabinets used solely for personal wireless service facilities.
((C402.1.1.1))C402.1.1.2 Semi-heated buildings and spaces. The building envelope of semi-heated buildings, or portions thereof, shall comply with the same requirements as that for conditioned spaces in Section C402, except as modified by this section. The total installed output capacity of mechanical space conditioning systems serving a semi-heated building or space shall comply with Section C202. Building envelope assemblies separating conditioned space from semi-heated space shall comply with exterior envelope insulation requirements. Semi-heated spaces heated by mechanical systems that do not include electric resistance heating equipment are not required to comply with the opaque wall insulation provisions of Section C402.2.3 for walls that separate semi-heated spaces from the exterior or low energy spaces. Semi-heated spaces shall be calculated separately from other conditioned spaces for compliance purposes. Opaque walls in semi-heated spaces shall be calculated as fully code compliant opaque walls for both the target and proposed for the Target UA calculations for Component Performance compliance per Section C402.1.5, and for the Standard Reference Design for Total Building Performance compliance per Section C407. The capacity of heat trace temperature maintenance systems complying with Section C404.7.2 that are provided for freeze protection of piping and equipment only shall not be included in the total installed output capacity of mechanical space conditioning systems.
EXCEPTION:
Building or space may comply as semi-heated when served by one or more of the following system alternatives:
 
1. Electric infrared heating equipment for localized heating applications.
 
2. Heat pumps with cooling capacity permanently disabled, as preapproved by the jurisdiction.
C402.1.1.3 Greenhouses.Greenhouse structures or areas that comply with all of the following shall be exempt from the building envelope requirements of this code:
1. Exterior opaque envelope assemblies comply with Sections C402.2 and C402.4.4.
EXCEPTION:
Low energy greenhouses that comply with Section C402.1.1.1.
2. Interior partition building thermal envelope assemblies that separate the greenhouse from conditioned space complying with Sections C402.2, C402.4.3 and C402.4.4.
3. Nonopaque envelope assemblies complying with the thermal envelope requirements in Table C402.1.1.3. The U-factor for the nonopaque roof shall be for the roof assembly or a roof that includes the assembly and an internal curtain system.
EXCEPTION:
Unheated greenhouses.
4. No mechanical cooling is provided.
5. For heated greenhouses, heating is provided by a radiant heating system, a condensing natural gas-fired or condensing propane-fired heating system, or a heat pump with cooling capacity permanently disabled as preapproved by the jurisdiction.
Table C402.1.1.3
Non-Opaque Thermal Envelope Maximum Requirements
Component U-Factor
BTU/h-ft2-°F
Climate Zone 5 and Marine 4
Non-opaque roof
0.5
Non-opaque SEW wall
0.7
Non-opaque N wall
0.6
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40212Section C402.1.2Equipment buildings.
C402.1.2 Equipment buildings. Buildings that comply with all of the following shall be exempt from the building thermal envelope provisions of this code:
1. Are separate buildings with floor area no more than 500 square feet (50 m2).
2. Are intended to house electronic equipment with installed equipment power totaling at least 7 watts per square foot (75 W/m2) and not intended for human occupancy.
3. Are served by mechanical cooling and heating systems sized in accordance with Sections C403.1.2 and C403.3.1.
4. Have a heating system capacity not greater than 17,000 Btu/hr (5 kW) and a heating thermostat set point that is restricted to not more than 50°F (10°C).
((4.))5. Have an average wall and roof U-factor less than 0.200.
EXCEPTION:
Where the cooling and heating system is a heat pump, the heating capacity is allowed to exceed 17,000 Btu/h provided the heat pump cooling efficiency is at least 15 percent better than the requirements in Table C403.3.2(2).
C402.1.2.1 Standalone elevator hoistways. Elevator hoistways that comply with all of the following shall be exempt from the building thermal envelope and envelope air barrier provisions of this code:
1. Are separate from any other conditioned spaces in the building (do not serve or open into any conditioned, semi-heated or indirectly conditioned space).
2. Have heating and/or cooling equipment sized only to serve the expected elevator loads with thermostat setpoints restricted to heating to no higher than 40°F and cooling to no lower than 95°F.
3. Have an area weighted average wall, roof and floor (where applicable) U-factor of less than or equal to 0.20. Calculations must include any floor-slab-edges that penetrate the hoistway and thus are considered part of the above-grade walls.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-402121Table C402.1.3Opaque thermal envelope assembly R-value requirements.
Table C402.1.3
Opaque Thermal Envelope Insulation Component
Minimum Requirements, R-value Methoda,((g))i
CLIMATE ZONE
5 AND MARINE 4
 
All Other
Group R
Roofs
Insulation entirely above deck
R-38ci
R-38ci
Metal buildingsb
R-25 + 
R-11 LS
R-25 + 
R-11 LS
Attic and other
R-49
R-49
Walls, Above Grade
Massh
R-9.5cic
R-13.3ci
Mass transfer deck slab edge
R-5
R-5
Metal buildings
R-19ci or R-13 + 13ci
R-19ci or R-13 + 13ci
Steel framed
R-13 + 
R-10ci
R-19 + 
R-8.5ci
Wood framed and other
R-21 int or R-15 + 5ci std
((R-21 int))R-13 + 7.5ci std or R-20 + 3.8ci std or R-25 std
Walls, Below Grade
Below-grade walld,h
Same as above grade
Same as above grade
Floors
Massf
R-30ci
R-30ci
Joist/framing
R-30e
R-30e
Slab-on-Grade Floors
Unheated slabs
R-10 for 24" below
R-10 for 24" below
Heated slabs
R-10 perimeter & under entire slab
R-10 perimeter & under entire slab
Opaque Doorsg
Nonswinging
R-4.75
R-4.75
For SI:
1 inch = 25.4 mm. ci = Continuous insulation. NR = No requirement.
LS = 
Liner systemA continuous membrane installed below the purlins and uninterrupted by framing members. Uncompressed, unfaced insulation rests on top of the membrane between the purlins.
a
Assembly descriptions can be found in Chapter 2 and Appendix A.
b
Where using R-value compliance method, a thermal spacer block with minimum thickness of 1/2-inch and minimum R-value of R-3.5 shall be provided, otherwise use the U-factor compliance method in Table C402.1.4.
c
Exception: Integral insulated concrete block walls complying with ASTM C90 with all cores filled and meeting both of the following:
 
1. At least 50 percent of cores must be filled with vermiculite or equivalent fill insulation; and
 
2. The building thermal envelope encloses one or more of the following uses: Warehouse (storage and retail), gymnasium, auditorium, church chapel, arena, kennel, manufacturing plant, indoor swimming pool, pump station, water and waste water treatment facility, storage facility, storage area, motor vehicle service facility. Where additional uses not listed (such as office, retail, etc.) are contained within the building, the exterior walls that enclose these areas may not utilize this exception and must comply with the appropriate mass wall R-value from Table C402.1.3/U-factor from Table C402.1.4.
d
Where heated slabs are below grade, they shall comply with the insulation requirements for heated slabs.
e
Steel floor joist systems shall be insulated to R-38 + R-10ci.
f
"Mass floors" shall include floors weighing not less than:
 
1. 35 pounds per square foot of floor surface area; or
 
2. 25 pounds per square foot of floor surface area where the material weight is not more than 120 pounds per cubic foot.
g
Not applicable to garage doors. See Table C402.1.4.
h
Peripheral edges of intermediate concrete floors are included in the above-grade mass wall category and therefore must be insulated as above-grade mass walls unless they meet the definition of Mass Transfer Deck Slab Edge. The area of the peripheral edges of concrete floors shall be defined as the thickness of the slab multiplied by the perimeter length of the edge condition. See Table A103.3.7.2 for typical default U-factors for above-grade slab edges and footnote c for typical conditions of above-grade slab edges.
i
For roof, wall or floor assemblies where the proposed assembly would not be continuous insulation, an alternate nominal R-value compliance option for assemblies with isolated metal penetrations of otherwise continuous insulation is:
Assemblies with continuous
insulation (see definition)
Alternate option for assemblies with metal penetrations, greater than 0.04% but less than 0.08%
Alternate option for assemblies with metal penetrations, greater than or equal to 0.08% but less than 0.12%
R-9.5ci
R-11.9ci
R-13ci
R-11.4ci
R-14.3ci
R-15.7ci
R-13.3ci
R-16.6ci
R-18.3ci
R-15.2ci
R-19.0ci
R-21ci
R-30ci
R-38ci
R-42ci
R-38ci
R-48ci
R-53ci
R-13 + R-7.5ci
R-13 + R-9.4ci
R-13 + R-10.3ci
R-13 + R-10ci
R-13 + R-12.5ci
R-13 + R-13.8ci
R-13 + R-12.5ci
R-13 + R-15.6ci
R-13 + R-17.2ci
R-13 + R-13ci
R-13 + R-16.3ci
R-13 + R-17.9ci
R-19 + R-8.5ci
R-19 + R-10.6ci
R-19 + R-11.7ci
R-19 + R-14ci
R-19 + R-17.5ci
R-19 + R-19.2ci
R-19 + R-16ci
R-19 + R-20ci
R-19 + R-22ci
R-20 + R-3.8ci
R-20 + R-4.8ci
R-20 + R-5.3ci
R-21 + R-5ci
R-21 + R-6.3ci
R-21 + R-6.9ci
This alternate nominal R-value compliance option is allowed for projects complying with all of the following:
1.
The ratio of the cross-sectional area, as measured in the plane of the surface, of metal penetrations of otherwise continuous insulation to the opaque surface area of the assembly is greater than 0.0004 (0.04%), but less than 0.0012 (0.12%).
2.
The metal penetrations of otherwise continuous insulation are isolated or discontinuous (e.g., brick ties or other discontinuous metal attachments, offset brackets supporting shelf angles that allow insulation to go between the shelf angle and the primary portions of the wall structure). No continuous metal elements (e.g., metal studs, z-girts, z-channels, shelf angles) penetrate the otherwise continuous portion of the insulation.
3.
Building permit drawings shall contain details showing the locations and dimensions of all the metal penetrations (e.g., brick ties or other discontinuous metal attachments, offset brackets, etc.) of otherwise continuous insulation. In addition, calculations shall be provided showing the ratio of the cross-sectional area of metal penetrations of otherwise continuous insulation to the overall opaque wall area.
For other cases where the proposed assembly is not continuous insulation, see Section C402.1.4 for determination of U-factors for assemblies that include metal other than screws and nails.
AMENDATORY SECTION(Amending WSR 16-13-089, filed 6/15/16, effective 7/16/16)
WAC 51-11C-40213Section C402.1.3Insulation component R-value method.
C402.1.3 Insulation component R-value-based method.Building thermal envelope opaque assemblies shall ((meet))comply with the requirements of Section C402.2 based on the climate zone specified in Chapter 3. For opaque portions of the building thermal envelope intended to comply on an insulation component R-value basis, the R-values for insulation ((in framing areas, where required, and for continuous insulation, where required,)) shall not be less than that specified in Table C402.1.3. Commercial buildings or portions of commercial buildings enclosing Group R occupancies shall use the R-values from the "Group R" column of Table C402.1.3. Commercial buildings or portions of commercial buildings enclosing occupancies other than Group R shall use the R-values from the "All other" column of Table C402.1.3. ((The thermal resistance or R-value of the insulating material installed in, or continuously on, below grade exterior walls of the building envelope required in accordance with Table C402.1.3 shall extend to the lowest floor of the conditioned space enclosed by the below grade wall. Doors having less than 50 percent opaque glass area shall be considered opaque doors. Opaque swinging doors shall comply with the Table C402.1.4 and opaque nonswinging doors shall comply with Table C402.1.3 or C402.1.4.))
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40214Section C402.1.4Assembly U-factor, C-factor, or F-factor-based method.
C402.1.4 Assembly U-factor, C-factor, or F-factor-based method. Building thermal envelope opaque assemblies shall meet the requirements of Section C402.2 based on the climate zone specified in Chapter 3. Building thermal envelope opaque assemblies intended to comply on an assembly U-, C-, or F-factor basis shall have a U-, C-, or F-factor not greater than that specified in Table C402.1.4. Commercial buildings or portions of commercial buildings enclosing Group R occupancies shall use the U-, C-, or F-factor from the "Group R" column of Table C402.1.4. Commercial buildings or portions of commercial buildings enclosing occupancies other than Group R shall use the U-, C-, or F-factor from the "All other" column of Table C402.1.4. ((The C-factor for the below-grade exterior walls of the building envelope, as required in accordance with Table C402.1.4, shall extend to the level of the lowest conditioned floor. Opaque swinging doors shall comply with Table C402.1.4 and opaque nonswinging doors shall comply with Table C402.1.3 or C402.1.4.)) The U-factors for typical construction assemblies are included in Appendix A. These values shall be used for all calculations. Where proposed construction assemblies are not represented in Appendix A, values shall be calculated in accordance with the ASHRAE HandbookFundamentals using the framing factors listed in Appendix A where applicable and shall include the thermal bridging effects of framing materials.
C402.1.4.1 Thermal resistance of cold-formed steel stud walls.U-factors of walls with cold-formed steel studs shall be permitted to be determined in accordance with Equation 4-1:
Equation 4-1:
U = 1/[Rs + (ER)]
Where:
Rs
=
The cumulative R-value of the wall components along the path of heat transfer, excluding the cavity insulation and steel studs.
ER
=
The effective R-value of the cavity insulation with steel studs.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-402141Table C402.1.4Opaque thermal envelope requirements, U-factor method.
Table C402.1.4
Opaque Thermal Envelope Requirementsa,f
CLIMATE ZONE
5 AND MARINE 4
 
All Other
Group R
Roofs
Insulation entirely above deck
U-0.027
U-0.027
Metal buildings
U-0.031
U-0.031
Attic and other
U-0.021
U-0.021
Joist or single rafter
U-0.027
U-0.027
Walls, Above Grade
Massg
U-0.104d
U-0.078
Mass transfer deck slab edge
U-0.20
U-0.20
Metal building
U-0.052
U-0.052
Steel framed
U-0.055
U-0.055
Wood framed and other
U-0.054
((U-0.054))
U-0.051
Walls, Below Grade
Below-grade wallb, g
Same as above grade
Same as above grade
Floors
Masse
U-0.031
U-0.031
Joist/framing
U-0.029
U-0.029
Slab-on-Grade Floors
Unheated slabs
F-0.54
F-0.54
Heated slabsc
F-0.55
F-0.55
Opaque Doors
Swinging door
U-0.37
U-0.37
Nonswinging door
U-0.34
U-0.34
Garage door <14% glazing
U-0.31
U-0.31
a
Use of opaque assembly U-factors, C-factors, and F-factors from Appendix A is required unless otherwise allowed by Section C402.1.4.
b
Where heated slabs are below grade, they shall comply with the F-factor requirements for heated slabs.
c
Heated slab F-factors shall be determined specifically for heated slabs. Unheated slab factors shall not be used.
d
Exception: Integral insulated concrete block walls complying with ASTM C90 with all cores filled and meeting both of the following:
 
1. At least 50 percent of cores must be filled with vermiculite or equivalent fill insulation; and
 
2. The building thermal envelope encloses one or more of the following uses: Warehouse (storage and retail), gymnasium, auditorium, church chapel, arena, kennel, manufacturing plant, indoor swimming pool, pump station, water and waste water treatment facility, storage facility, storage area, motor vehicle service facility. Where additional uses not listed (such as office, retail, etc.) are contained within the building, the exterior walls that enclose these areas may not utilize this exception and must comply with the appropriate mass wall R-value from Table C402.1.3/U-factor from Table C402.1.4.
e
"Mass floors" shall include floors weighing not less than:
1. 35 pounds per square foot of floor surface area; or
2. 25 pounds per square foot of floor surface area where the material weight is not more than 120 pounds per cubic foot.
f
Opaque assembly U-factors based on designs tested in accordance with ASTM C1363 shall be permitted. The R-value of continuous insulation shall be permitted to be added or substracted from the original test design.
g
Peripheral edges of intermediate concrete floors are included in the above-grade mass wall category and therefore must be insulated as above-grade mass walls unless they meet the definition of Mass Transfer Deck Slab Edge. The area of the peripheral edges of concrete floors shall be defined as the thickness of the slab multiplied by the perimeter length of the edge condition. See Table A103.3.7.2 for typical default U-factors for above-grade slab edges and footnote c for typical conditions of above-grade slab edges.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40220Section C402.2Specific insulation requirements.
C402.2 Specific building thermal envelope insulation requirements (((Prescriptive))). Insulation in building thermal envelope opaque assemblies shall comply with Sections C402.2.1 through C402.2.6 and Table C402.1.3.
Where this section refers to installing insulation levels as specified in Section C402.1.3, assemblies complying with Section C402.1.4 and buildings complying with Section C402.1.5 are allowed to install alternate levels of insulation so long as the U-factor of the insulated assembly is less than or equal to the U-factor required by the respective path.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40221Section C402.2.1((Multiple layers of continuous insulation))Roof assembly.
C402.2.1 ((Multiple layers of continuous insulation. Where two or more layers of continuous insulation board are used in a construction assembly, the continuous insulation boards shall be installed in accordance with Section C303.2. If the continuous insulation board manufacturer's installation instructions do not address installation of two or more layers, the edge joints between each layer of continuous insulation boards shall be staggered.))Roof assembly. The minimum thermal resistance (R-value) of the insulating material installed either between the roof framing or continuously on the roof assembly shall be as specified in Table C402.1.3, based on construction materials used in the roof assembly. Continuous insulation board shall be installed in not less than 2 layers and the edge joints between each layer of insulation shall be staggered. Insulation installed on a suspended ceiling with removable ceiling tiles shall not be considered part of the minimum thermal resistance of the roof insulation.
EXCEPTIONS:
1. Continuously insulated roof assemblies where the thickness of insulation varies 1 inch (25 mm) or less and where the area-weighted U-factor is equivalent to the same assembly with the R-value specified in Table C402.1.3.
 
2. Where tapered insulation is used with insulation entirely above deck, those roof assemblies shall show compliance on a U-factor basis per Section C402.1.4. The effective U-factor shall be determined through the use of Tables A102.2.6(1), A102.2.6(2) and A102.2.6(3).
 
3. Two layers of insulation are not required where insulation tapers to the roof deck, such as at roof drains. At roof drains, the immediate 24 inch by 24 inch plan area around each roof drain has a minimum insulation requirement of R-13, but otherwise is permitted to be excluded from the roof insulation area-weighted calculations.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-402211((Reserved.))Skylight curbs.
C402.2.1.1 Skylight curbs. Skylight curbs shall be insulated to the level of roofs with insulation entirely above deck or R-5, whichever is less.
EXCEPTION:
Unit skylight curbs included as a component of a skylight listed and labeled in accordance with NFRC 100 shall not be required to be insulated.
C402.2.1.2 Rooftop HVAC equipment curbs. Structural curbs installed to support rooftop HVAC equipment are allowed to interrupt the above roof insulation. The area under the HVAC equipment inside of the equipment curb shall be insulated to a minimum of R-13 in all locations where there are not roof openings for ductwork. The annular space between the roof opening and the ductwork shall be sealed to maintain the building air barrier. The plan-view area of the HVAC equipment curb shall be excluded from the prescriptive roof insulation requirements or the area-weighted component performance calculations.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40222((Section C402.2.2Roof assembly.))Reserved.
((C402.2.2Roof assembly. The minimum thermal resistance (R-value) of the insulating material installed either between the roof framing or continuously on the roof assembly shall be as specified in Table C402.1.3, based on construction materials used in the roof assembly. Skylight curbs shall be insulated to the level of roofs with insulation entirely above deck or R-5, whichever is less.
EXCEPTIONS:
1. Continuously insulated roof assemblies where the thickness of insulation varies 1 inch (25 mm) or less and where the area-weighted U-factor is equivalent to the same assembly with the R-value specified in Table C402.1.3.
 
2. Where tapered insulation is used with insulation entirely above deck, those roof assemblies shall show compliance on a U-factor basis per Section C402.1.4. The effective U-factor shall be determined through the use of Tables A102.2.6(1), A102.2.6(2) and A102.2.6(3).
 
3. Unit skylight curbs included as a component of a skylight listed and labeled in accordance with NFRC 100 shall not be required to be insulated.
Insulation installed on a suspended ceiling with removable ceiling tiles shall not be considered part of the minimum thermal resistance of the roof insulation.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40223Section C402.2.3Above-grade walls.
C402.2.3 ((Thermal resistance of))Above-grade walls. The minimum thermal resistance (R-value) of materials installed in the wall cavity between the framing members and continuously on the walls shall be as specified in Table C402.1.3, based on framing type and construction materials used in the wall assembly. The R-value of integral insulation installed in concrete masonry units (CMU) shall not be used in determining compliance with Table C402.1.3 except as otherwise noted in the table. In determining compliance with Table C402.1.4, the use of the U-factor of concrete masonry units with integral insulation shall be permitted.
"Mass walls" ((shall include walls))where used as a component in the thermal envelope of a building shall comply with one of the following:
1. ((Weighing))Weigh not less than 35 psf (170 kg/m2) of wall surface area.
2. ((Weighing))Weigh not less than 25 psf (120 kg/m2) of wall surface area where the material weight is not more than 120 pounds per cubic foot (pcf) (1,900 kg/m3).
3. ((Having))Have a heat capacity exceeding 7 Btu/ft2 x °F (144 kJ/m2 x K).
4. ((Having))Have a heat capacity exceeding 5 Btu/ft2 x °F (103 kJ/m2 x K) where the material weight is not more than 120 pcf (1900 kg/m3).
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40224Section C402.2.4Below-grade walls.
C402.2.4 ((Thermal resistance of))Below-grade walls. The ((minimum thermal resistance ())R-value(())) of the insulating material installed in, or continuously on, the below-grade walls shall be ((as specified)) in accordance with Table C402.1.3. The U-factor or R-value required shall extend to the level of the lowest floor of the conditioned space enclosed by the below-grade wall.
AMENDATORY SECTION(Amending WSR 16-13-089, filed 6/15/16, effective 7/16/16)
WAC 51-11C-40225Section C402.2.5Floors.
C402.2.5 Floors. The thermal properties (component R-values or assembly U- or F-factors) of floor assemblies over outdoor air or unconditioned space shall be as specified in Table C402.1.3 or C402.1.4 based on the construction materials used in the floor assembly. Floor framing cavity insulation or structural slab insulation shall be installed to maintain permanent contact with the underside of the subfloor decking or structural slabs.
"Mass floors" where used as a component of the thermal envelope of a building shall provide one of the following weights:
1. 35 pounds per square foot of floor surface area;
2. 25 pounds per square foot of floor surface area where the material weight is not more than 120 pounds per cubic foot.
EXCEPTIONS:
1. The floor framing cavity insulation or structural slab insulation shall be permitted to be in contact with the top side of sheathing or continuous insulation installed on the bottom side of floor assemblies where combined with insulation that meets or exceeds the minimum R-value in Table C402.1.3 for "Metal framed" or "Wood framed and other" values for "Walls, Above Grade" and extends from the bottom to the top of all perimeter floor framing or floor assembly members.
 
2. Insulation applied to the underside of concrete floor slabs shall be permitted an air space of not more than 1 inch where it turns up and is in contact with the underside of the floor under walls associated with the building thermal envelope.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40227((Reserved.))Airspaces.
Where the thermal properties of airspaces are used to comply with this code in accordance with Section C401.2, such airspaces shall be enclosed in an unventilated cavity constructed to minimize airflow into and out of the enclosed airspace. Airflow shall be deemed minimized where the enclosed airspace is located on the interior side of the continuous air barrier and is bounded on all sides by building components.
EXCEPTION:
The thermal resistance of airspaces located on the exterior side of the continuous air barrier and adjacent to and behind the exterior wall covering material shall be determined in accordance with ASTM C1363 modified with an airflow entering the bottom and exiting the top of the airspace at a minimum air movement rate of not less than 70 mm/sec.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40228Section C402.2.8Insulation of radiant heating systems.
C402.2.8 Insulation of radiant heating systems.Radiant heating system panels, and their associated components that are installed in interior or exterior assemblies shall be insulated ((with a minimum of))to an R-value of not less than R-3.5 (((0.62 m2/K × W))) on all surfaces not facing the space being heated. Radiant heating system panels that are installed in the building thermal envelope shall be separated from the exterior of the building or unconditioned or exempt spaces by not less than the R-value of insulation installed in the opaque assembly in which they are installed or the assembly shall comply with Section C402.1.4.
EXCEPTION:
Heated slabs on grade insulated in accordance with Section C402.2.6.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40230Section C402.4Fenestration (((Prescriptive))).
C402.3 Reserved.
C402.4 Fenestration (((Prescriptive))). Fenestration shall comply with Sections C402.4 through C402.4.4 and Table C402.4. Daylight responsive controls shall comply with this section and Section C405.2.4.1.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-402300Table C402.4Building envelope requirementsFenestration.
Table C402.4
Building Envelope Fenestration Maximum U-factor and SHGC Requirements
((CLIMATE ZONE
5 AND MARINE 4
 
Vertical Fenestration
U-factor
 
 
Nonmetal framing (all)a
0.30
 
Metal framing (fixed)b
0.38
 
Metal framing (operable)c
0.40
 
Metal framing (entrance doors)d
0.60
 
SHGC
 
 
Orientation
SEW
N
PF < 0.2
0.40
0.53
0.2 < PF < 0.5
0.48
0.58
PF ˃ 0.5
0.64
0.64
Skylights
U-factor
0.50
 
SHGC
0.35))
 
CLIMATE ZONE
5 AND MARINE 4
U-factor for Class AW windows rated in accordance with AAMA/CSA101/I.S.2/A440, vertical curtain walls and site-built fenestration productsa
FixedbU-factor
U-0.38
OperablecU-factor
U-0.40
Entrance doorsd
U-factor
U-0.60
U-factor for all other vertical fenestration
U-factor
U-0.30
SHGC for all vertical fenestration
Orientatione,f
SEW
N
PF < 0.2
0.38
0.51
0.2 ≤ PF < 0.5
0.46
0.56
PF ≥ 0.5
0.61
0.61
Skylights
U-factor
U-0.50
SHGC
0.35
((NR =
No requirement.))
 
a(("Nonmetal framing" includes framing materials other than metal, with or without metal reinforcing or cladding))U-factor and SHGC shall be rated in accordance with NFRC 100.
 
b(("Metal framing" includes metal framing, with or without thermal break.)) "Fixed" includes curtain wall, storefront, picture windows, and other fixed windows.
 
c(("Metal framing" includes metal framing, with or without thermal break.)) "Operable" includes openable fenestration products other than "entrance doors."
 
d(("Metal framing" includes metal framing, with or without thermal break.)) "Entrance door" includes glazed swinging entrance doors. Other doors which are not entrance doors, including sliding glass doors, are considered "operable."
 
e "N" indicates vertical fenestration oriented within 30 degrees of true north. "SEW" indicates orientations other than "N."
 
f Fenestration that is entirely within the conditioned space or is between conditioned and other enclosed space is exempt from solar heat gain coefficient requirements and not included in the SHGC calculation.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40231Section C402.4.1Maximum area.
C402.4.1 Maximum area. The total building vertical fenestration area (not including opaque doors and opaque spandrel panels) shall not exceed 30 percent of the total building gross above-grade wall area. The skylight area shall not exceed 5 percent of the total building gross roof area (skylight-to-roof ratio).
For buildings with more than one space conditioning category, compliance with the maximum allowed window-to-wall ratio and skylight-to-roof ratio shall be demonstrated separately for each space conditioning category. Interior partition ceiling, wall, fenestration and floor areas that separate space conditioning areas shall not be applied to the window-to-wall ratio and skylight-to-roof ratio calculations.
C402.4.1.1 ((Increased))Vertical fenestration maximum area with ((daylight responsive controls. A maximum of 40 percent of the gross above-grade wall area shall be permitted to be vertical fenestration for the purpose of prescriptive compliance with Section C402.1.4 or for the component performance alternative in Section C402.1.5, provided all of the following requirements are met:
1. In buildings not greater than two stories above grade, no))high performance alternates. For buildings that comply with Section C402.4.1.1.1 or C402.4.1.1.2, the total building vertical fenestration area is permitted to exceed 30 percent but shall not exceed 40 percent of the gross above grade wall area for the purpose of prescriptive compliance with Section C402.1.4.
When determining compliance using the component performance alternative in accordance with Section C402.1.5, the total building vertical fenestration area allowed in Equation 4-2 is 40 percent of the above grade wall area for buildings that comply with the vertical fenestration alternates described in this section.
C402.4.1.1.1 Optimized daylighting. All of the following requirements shall be met:
1. Not less than 50 percent of the total conditioned floor area in the building is within a daylight zonethat includes daylight responsive controls complying with Section C405.2.4.1.
2. ((In buildings three or more stories above grade, not less than 25 percent of the net floor area is within a daylight zone.
3. Daylight responsive controls complying with Section C405.2.4.1 are installed in daylight zones.
4.)) Visible transmittance (VT) of allvertical fenestrationin the building is greater than or equal to 1.1 times the required solar heat gain coefficient (SHGC) in accordance with Section C402.4, or 0.50, whichever is greater. It shall be permitted to demonstrate compliance based on the area weighted average VT being greater than or equal to the area weighted average of the minimum VT requirements.
EXCEPTION:
Fenestration that is outside the scope of NFRC 200 is not required to comply with Item ((4))2.
((C402.4.1.2 Reserved.
C402.4.1.3 Increased vertical fenestration area with))C402.4.1.1.2 High-performance fenestration.((The vertical fenestration area (not including opaque doors and opaque spandrel panels) is permitted to exceed 30 percent but shall not exceed 40 percent of the gross above grade wall area, for the purpose of prescriptive compliance with Section C402.1.3 provided that each of the following conditions are met:
1. The vertical fenestration shall have))All of the following requirements shall be met:
1. All vertical fenestration in the building shall comply with the following U-factors:
a. ((Nonmetal framing (all) = 0.28))U-factor for Class AW windows rated in accordance with AAMA/CSA101/I.S.2/A440, vertical curtain walls and site-built fenestration products (fixed) = 0.34
b. ((Metal framing (fixed) = 0.34))U-factor for Class AW windows rated in accordance with AAMA/CSA101/I.S.2/A440, vertical curtain walls and site-built fenestration products (operable) = 0.36
c. ((Metal framing (operable) = 0.36))Entrance doors = 0.60
d. ((Metal framing (entrance doors) = 0.60))U-factor for all other vertical fenestration = 0.28
2. The SHGC of the vertical fenestration shall be less than or equal to 0.35, adjusted for projection factor in compliance with C402.4.3.
An area-weighted average shall be permitted to satisfy the U-factor requirement for each fenestration product category listed in Item 1 of this section. Individual fenestration products from different fenestration product categories shall not be combined in calculating the area-weighted average U-factor.
((The compliance path described in this section is not permitted to be used for the total building performance compliance path in Section C407. The compliance path described in this section is permitted to be used for the component performance alternative in Section C402.1.5, provided that the requirements of Section C402.1.5 are met.
C402.4.1.4 Increased vertical fenestration area with high-performance mechanical systems. The vertical fenestration area (not including opaque doors and opaque spandrel panels) is permitted to exceed 30 percent but shall not exceed 40 percent of the gross above-grade wall area, for the purpose of prescriptive compliance with Section C402.1.4 or for the component performance alternative in Section C402.1.5, provided that the mechanical system complies with all requirements of Section C403.6 Dedicated outdoor air systems (DOAS) without utilizing the exceptions to Section C403.6. This increased glazing fraction is not permitted to be used to establish the reference case for the Total Building Performance compliance path in Section C407.))
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40232Section C402.4.2Minimum skylight fenestration area.
C402.4.2 Minimum skylight fenestration area. For ((single story buildings only, in an))buildings with single story enclosed spaces greater than 2,500 square feet (232 m2) in floor area((,))that are directly under a roof ((with not less than 75 percent of the ceiling area with))and have a ceiling height greater than 15 feet (4572 mm)((, and used as an))for no less than 75 percent of the ceiling area, these single-story spaces shall be provided with skylights and daylight responsive controls in accordance with Section C405.2.4. Space types required to comply with this provision include office, lobby, atrium, concourse, corridor, gymnasium/exercise center, convention center, automotive service, manufacturing, nonrefrigerated warehouse, retail store, distribution/sorting area, transportation, ((or workshop, skylights))and workshop. Skylights in these spaces are required to provide a total ((toplight daylight))toplit zone area not less than ((half))50 percent of the floor area and shall provide one of the following:
1. A minimum ratio of skylight area to ((toplight daylight))toplit zone area under skylights of not less than 3 percent where all skylights have a VT of at least 0.40 as determined in accordance with Section C303.1.3.
2. A minimum skylight effective aperture of at least 1 percent determined in accordance with Equation 4-5.
 
Skylight Effective Aperture
=
(0.85 x Skylight Area x Skylight VT x WF)/((Daylight zone under skylight))Toplit zone
 
(Equation 4-5)
Where:
 
 
Skylight area
=
Total fenestration area of skylights.
Skylight VT
=
Area weighted average visible transmittance of skylights.
WF
=
Area weighted average well factor, where well factor is 0.9 if light well depth is less than 2 feet (610 mm), or 0.7 if light well depth is 2 feet (610 mm) or greater, or 1.0 for tubular daylighting devices (TDD) with VT-annual ratings measured in accordance with NFRC 203.
Light well depth
=
Measure vertically from the underside of the lowest point of the skylight glazing to the ceiling plane under the skylight.
EXCEPTIONS:
1. Skylights above daylight zones of enclosed spaces are not required in:
 
((1.))1.1. Reserved.
 
((2.))1.2. Spaces where the designed general lighting power densities are less than 0.5 W/ft2 (5.4 W/m2) and at least 10 percent lower than the lighting power allowance in Section C405.4.2.
 
((3.))1.3. Areas where it is documented that existing structures or natural objects block direct beam sunlight on at least half of the roof over the enclosed area for more than 1,500 daytime hours per year between 8 a.m. and 4 p.m.
 
((4.))1.4. Spaces where the daylight zone under rooftop monitors is greater than 50 percent of the enclosed space floor area.
 
((5.))1.5. Spaces where the total floor area minus the ((sidelight daylight))sidelitzone area is less than 2,500 square feet (232 m2), and where the lighting in the daylight zone is controlled in accordance with Section C405.2.3.1.
 
2. The skylight effective aperture, calculated in accordance with Equation 4-5, is permitted to be 0.66 percent in lieu of 1 percent if the VT-annual of the skylight or TDD, as measured by NFRC 203, is greater than 38 percent.
C402.4.2.1 Lighting controls in daylight zones under skylights. Daylight responsive controls complying with Section C405.2.4.1 shall be provided to control all electric lights within ((daylight))toplit zones.
C402.4.2.2 Haze factor. Skylights in office, storage, automotive service, manufacturing, nonrefrigerated warehouse, retail store, and distribution/sorting area spaces shall have a glazing material or diffuser with a haze factor greater than 90 percent when tested in accordance with ASTM D 1003.
EXCEPTION:
Skylights designed and installed to exclude direct sunlight entering the occupied space by the use of fixed or automated baffles, or the geometry of skylight and light well.
C402.4.2.3 Daylight zones. Daylight zones referenced in Sections C402.4.1.1 through C402.4.2.2 shall comply with Section C405.2.4.2 and C405.2.4.3, as applicable. Daylight zones shall include toplit zones and sidelit zones.
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-40234Section C402.4.4Doors.
C402.4.4 Doors. Opaque swinging doors shall comply with ((the applicable requirements for doors as specified in Tables C402.1.3 and C402.1.4 and))Table C402.1.4. Opaque nonswinging doors shall comply with Table C402.1.3. Opaque doors shall be considered part of the gross area of above grade walls that are part of the building thermal envelope. Other doors shall comply with the provisions of Section C402.4.3 for vertical fenestration and the entire door area, including the frame, shall be considered part of the fenestration area of the building thermal envelope.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40240Section C402.5Air leakage-thermal envelope.
C402.5 Air leakage-thermal envelope (((Mandatory))). The thermal envelope of buildings shall comply with Sections C402.5.1 through C402.5.8.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40241Section C402.5.1Air barriers.
C402.5.1 Air barriers. A continuous air barrier shall be provided throughout the building thermal envelope. The air barriers shall be permitted to be located on the inside or outside of the building envelope, located within the assemblies composing the envelope, or any combination thereof. The air barrier shall comply with Sections C402.5.1.1 and C402.5.1.2.
C402.5.1.1 Air barrier construction. The continuous air barrier shall be constructed to comply with the following:
1. The air barrier shall be continuous for all assemblies that are the thermal envelope of the building and across the joints and assemblies.
2. Air barrier joints and seams shall be sealed, including sealing transitions in places and changes in materials. The joints and seals shall be securely installed in or on the joint for its entire length so as not to dislodge, loosen or otherwise impair its ability to resist positive and negative pressure from wind, stack effect and mechanical ventilation.
3. Penetrations of the air barrier shall be caulked, gasketed or otherwise sealed in a manner compatible with the construction materials and location. Sealing shall allow for expansion, contraction and mechanical vibration. Joints and ((seals))seams associated with penetrations shall be sealed in the same manner or taped ((or covered with moisture vapor-permeable wrapping material)). Sealing materials shall be ((appropriate to the construction materials being sealed and shall be)) securely installed around the penetration so as not to dislodge, loosen or otherwise impair the penetrations' ability to resist positive and negative pressure from wind, stack effect, and mechanical ventilation. Sealing of concealed fire sprinklers, where required, shall be in a manner that is recommended by the manufacturer. Caulking or other adhesive sealants shall not be used to fill voids between fire sprinkler cover plates and walls or ceilings.
4. Recessed lighting fixtures shall comply with Section C402.5.8. Where similar objects are installed which penetrate the air barrier, provisions shall be made to maintain the integrity of the air barrier.
5. Construction documents shall contain a diagram showing the building's pressure boundary in plan(s) and section(s) and a calculation of the area of the pressure boundary to be considered in the test.
C402.5.1.2 Building test. The completed building shall be tested and the air leakage rate of the building envelope shall not exceed ((0.40))0.25 cfm/ft2 at a pressure differential of 0.3 inches water gauge (2.0 L/s • m2 at 75 Pa) at the upper 95 percent confidence interval in accordance with ASTM E 779 or an equivalent method approved by the code official. A report that includes the tested surface area, floor area, air by volume, stories above grade, and leakage rates shall be submitted to the building owner and the Code Official. If the tested rate exceeds that defined here by up to 0.15 cfm/ft2, a visual inspection of the air barrier shall be conducted and any leaks noted shall be sealed to the extent practicable. An additional report identifying the corrective actions taken to seal air leaks shall be submitted to the building owner and the Code Official and any further requirement to meet the leakage air rate will be waived. If the tested rate exceeds 0.40 cfm/ft2, corrective actions must be made and the test completed again. A test above 0.40 cfm/ft2 will not be accepted.
1. Test shall be accomplished using either (1) both pressurization and depressurization or (2) pressurization alone, but not depressurization alone. The test results shall be plotted against the corrected P in accordance with Section 9.4 of ASTM E 779.
2. The test pressure range shall be from 25 Pa to 80 Pa per Section 8.10 of ASTM E 779, but the upper limit shall not be less than 50 Pa, and the difference between the upper and lower limit shall not be less than 25 Pa.
3. If the pressure exponent n is less than 0.45 or greater than 0.85 per Section 9.6.4 of ASTM E 779, the test shall be rerun with additional readings over a longer time interval.
C402.5.1.2.1 Building test for mixed-use buildings. Where a building is three or fewer stories above grade plane and contains both commercial and residential uses, the air barrier of the R-2 and R-3 occupancy areas of the building is permitted to be separately tested according to Section R402.4.1.2. Alternatively, it is permissible to test the air barrier of the entire building according to Section C402.5.1.2, provided that the tested air leakage rate does not exceed the rate specified in Section C402.5.1.2.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40243Section C402.5.3Rooms containing fuel-burning appliances.
C402.5.3 Rooms containing fuel-burning appliances. Where ((open)) combustion air ((ducts provide combustion air to open combustion))is supplied through openings in an exterior wall to a room or space containing a space conditioning fuel-burning appliance((s, the appliances and combustion air openings)), one of the following shall apply:
1. The room or space containing the appliance shall be located outside of the building thermal envelope((or enclosed in a room)).
2. The room or space containing the appliance shall be enclosed and isolated from conditioned spaces inside the building thermal envelope. Such rooms shall ((be sealed and insulated in accordance with the envelope requirements of))comply with all of the following:
2.1. The walls, floor and ceiling that separate the enclosed room or space from the conditioned spaces shall be insulated to be at least equivalent to the insulation requirement of below grade walls as specified in Table C402.1.3 or C402.1.4((, where)).
2.2. The walls, floors and ceilings ((shall meet the minimum of the below-grade wall R-value requirement.))that separate the enclosed room or space from conditioned spaces be sealed in accordance with Section C402.5.1.1.
2.3. The doors into the enclosed room or space shall be fully gasketed((, and any)).
2.4. Water lines and ducts in the enclosed room or space shall be insulated in accordance with Section C403. ((The combustion))
2.5. Where the air duct supplying combustion air to the enclosed room or space passes through conditioned space, the duct shall be insulated((, where it passes through conditioned space, to a minimum of))to an R-value of not less than R-8.
EXCEPTION((S)):
((1. Direct vent appliances with both intake and exhaust pipes installed continuous to the outside.
 
2.)) Fireplaces and stoves complying with Sections 901 through 905 of the International Mechanical Code, and Section 2111.13 of the International Building Code.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40244Section C402.5.4Doors and access openings.
C402.5.4 Doors and access openings to shafts, chutes, stairways, and elevator lobbies. Doors and access openings from conditioned space to shafts, chutes, stairways and elevator lobbies shall be gasketed, weatherstripped or sealed.
EXCEPTIONS:
1. Door openings required to comply with Section ((715 or 715.4))716 of the International Building Code.
 
2. Doors and door openings required to comply with UL 1784 by the International Building Code.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40245Section C402.5.5Air intakes, exhaust openings, stairways and shafts.
C402.5.5 Air intakes, exhaust openings, stairways and shafts. Stairway enclosures, elevator shaft vents and other outdoor air intakes and exhaust openings integral to the building envelope shall be provided with dampers in accordance with Section ((C403.2.4.3))C403.7.9.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40246Section C402.5.6Loading dock weatherseals.
C402.5.6 Loading dock weatherseals. Cargo door((s))openings and loading dock door((s))openings shall be equipped with weatherseals ((to))that restrict infiltration ((when))and provide direct contact along the top and sides of vehicles that are parked in the doorway.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40247Section C402.5.7Vestibules.
C402.5.7 Vestibules. All building entrances shall be protected with an enclosed vestibule, with all doors opening into and out of the vestibule equipped with self-closing devices. Vestibules shall be designed so that in passing through the vestibule it is not necessary for the interior and exterior doors to open at the same time. The installation of one or more revolving doors in the building entrance shall not eliminate the requirement that a vestibule be provided on any doors adjacent to revolving doors. For the purposes of this section, "building entrances" shall include exit-only doors in buildings where separate doors for entering and exiting are provided.
Interior and exterior doors shall have a minimum distance between them of not less than 7 feet. The exterior envelope of conditioned vestibules shall comply with the requirements for a conditioned space. Either the interior or exterior envelope of unconditioned vestibules shall comply with the requirements for a conditioned space. The building lobby is not considered a vestibule.
EXCEPTION:
Vestibules are not required for the following:
 
1. Doors not intended to be used as building entrances.
 
2. Unfinished ground-level space greater than 3,000 square feet (298 m2) if a note is included on the permit documents at each exterior entrance to the space stating "Vestibule required at time of tenant build-out if entrance serves a space greater than 3,000 square feet in area."
 
3. Doors opening directly from a sleeping unit or dwelling unit.
 
4. Doors between ((a))an enclosed space smaller than 3,000 square feet (298 m2) in area and the exterior of the building or the building entrance lobby, where those doors do not comprise one of the primary building entrance paths to the remainder of the building. The space must be enclosed and separated without transfer air paths from the primary building entrance paths. If there are doors between the space and the primary entrance path, then the doors shall be equipped with self-closing devices so the space acts as a vestibule for the primary building entrance.
 
5. Revolving doors.
 
6. Doors used primarily to facilitate vehicular movement or material handling and adjacent personnel doors.
 
7. In buildings less than 3 stories above grade or in spaces that do not directly connect with the building elevator lobby, doors that have an air curtain with a velocity of not less than 6.56 feet per second (2 m/s) at the floor that have been tested in accordance with ANSI/AMCA 220 and installed in accordance with the manufacturer's instructions. Manual or automatic controls shall be provided that will operate the air curtain with the opening and closing of the door. Air curtains and their controls shall comply with Section C408.2.3.
 
8. Building entrances in buildings that are less than four stories above grade and less than 10,000 ft2 in area.
 
9. Elevator doors in parking garages provided that the elevators have an enclosed lobby at each level of the garage.
 
10. Entrances to semi-heated spaces.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40310Section C403.1General.
C403.1 General. Mechanical systems and equipment serving heating, cooling, ventilating, and other needs shall comply with ((Section C403.2 and shall comply with Sections C403.3 and C403.4 based on the equipment and systems provided))this section.
EXCEPTIONS:
1. Energy using equipment used by a manufacturing, industrial or commercial process other than for conditioning spaces or maintaining comfort and amenities for the occupants and not otherwise regulated by ((C403.2.3, Tables C403.2.3))Section C403.3.2, Tables C403.3.2 (1) through (((10)))(12) inclusive, ((C403.2.4.5, C403.2.4.6, C403.2.7, C403.2.9, C403.5.4))Sections C403.7.8, C403.9.5, C403.10.3, C403.11.2, C403.11.3, C404.2, Table C404.2, C405.8 and C410. ((Data center))Computer room HVAC equipment is not covered by this exception.
 
2. Data center systems are exempt from Sections C403.4 and C403.5.
C403.1.1 HVAC total system performance ratio (HVAC TSPR). For systems serving office, retail, library, and education occupancies and buildings, which are subject to the requirements of Section C403.3.5 without exceptions, the HVAC total system performance ratio (HVAC TSPR) of the proposed design HVAC system shall be more than or equal to the HVAC TSPR of the standard reference design as calculated according to Appendix D, Calculation of HVAC Total System Performance Ratio.
EXCEPTIONS:
1. Buildings with conditioned floor area less than 5,000 square feet.
 
2. HVAC systems using district heating water, chilled water or steam.
 
3. HVAC systems not included in Table D601.11.1.
 
4. HVAC systems with chilled water supplied by absorption chillers, heat recovery chillers, water to water heat pumps, air to water heat pumps, or a combination of air and water cooled chillers on the same chilled water loop.
 
5. HVAC systems served by heating water plants that include air to water or water to water heat pumps.
 
6. Underfloor air distribution HVAC systems.
 
7. Space conditioning systems that do not include mechanical cooling.
 
8. Alterations to existing buildings that do not substantially replace the entire HVAC system.
 
9. HVAC systems meeting all the requirements of the standard reference design HVAC system in Table D602.11, Standard Reference Design HVAC Systems.
C403.1.2 Calculation of heating and cooling loads. Design loads associated with heating, ventilating and air conditioning of the building shall be determined in accordance with the procedures described in ANSI/ASHRAE/ACCA Standard 183 or by an approved equivalent computational procedure, using the design parameters specified in Chapter 3. Heating and cooling loads shall be adjusted to account for load reductions that are achieved where energy recovery systems are utilized in the HVAC system in accordance with the ASHRAE HVAC Systems and Equipment Handbook by an approved equivalent computational procedure.
C403.1.3 Data centers.Data center systems shall comply with Sections 6 and 8 of ASHRAE Standard 90.4 with the following changes:
1. Replace design MLC in ASHRAE Standard 90.4 Table 6.2.1.1 "Maximum Design Mechanical Load Component (Design MLC)" with the following per the applicable climate zone:
Zone 4C Design MLC = 0.22     Zone 5B Design MLC = 0.24
2. Replace annualized MLC values of Table 6.2.1.2 "Maximum Annualized Mechanical Load Component (Annualized MLC)" in ASHRAE Standard 90.4 with the following per applicable climate zone:
Zone 4C Annual MLC = 0.18     Zone 5B Annual MLC = 0.17
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40320Section C403.2((Provisions applicable to all mechanical))System((s))design.
C403.2 ((Provisions applicable to all mechanical systems (Mandatory).))System design. Mechanical systems ((and equipment serving the building heating, cooling or ventilating needs)) shall be designed to comply with Sections C403.2.1 ((through C403.2.13))and C403.2.2. Where elements of a building's mechanical systems are addressed in Sections C403.3 through C403.13, such elements shall comply with the applicable provisions of those sections.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40321Section C403.2.1((Calculation of heating and cooling loads))Zone isolation.
C403.2.1((Calculation of heating and cooling loads. Design loads associated with heating, ventilating and air conditioning of the building shall be determined in accordance with the procedures described in ANSI/ASHRAE/ACCA Standard 183 or by an approved equivalent computational procedure, using the design parameters specified in Chapter 3. Heating and cooling loads shall be adjusted to account for load reductions that are achieved where energy recovery systems are utilized in the HVAC system in accordance with the ASHRAE HVAC Systems and Equipment Handbook by an approved equivalent computational procedure.))Zone isolation required. HVAC systems serving zones that are intended to operate or be occupied nonsimultaneously shall be divided into isolation areas. Zones may be grouped into a single isolation area provided it does not exceed 25,000 square feet (2323 m2) of conditioned floor area nor include more than one floor. Each isolation area shall be equipped with isolation devices and controls configured to automatically shut off the supply of conditioned air and outdoor air to and exhaust air from the isolation area. Each isolation area shall be controlled independently by a device meeting the requirements of Section C403.4.2.2. Central systems and plants shall be provided with controls and devices that will allow system and equipment operation for any length of time while serving only the smallest isolation area served by the system or plant.
EXCEPTIONS:
1. Exhaust air and outdoor air connections to isolation areas where the fan system to which they connect is not greater than 5,000 cfm (2360 L/s).
 
2. Exhaust airflow from a single isolation area of less than 10 percent of the design airflow of the exhaust system to which it connects.
 
3. Isolation areas intended to operate continuously or intended to be inoperative only when all other isolation areas in a zone are inoperative.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40322Section C403.2.2((Equipment and systems sizing))Ventilation and exhaust.
C403.2.2 ((Equipment and system sizing. The output capacity of heating and cooling equipment shall be no greater than that of the smallest available equipment size that exceeds the loads calculated in accordance with Section C403.2.1. A single piece of equipment providing both heating and cooling shall satisfy this provision for one function with the capacity for the other function as small as possible, within available equipment options.
EXCEPTIONS:
1. Required standby equipment and systems provided with controls and devices that allow such systems or equipment to operate automatically only when the primary equipment is not operating.
 
2. Multiple units of the same equipment type with combined capacities exceeding the design load and provided with controls that are configured to sequence the operation of each unit based on load.))
Ventilation and exhaust.
C403.2.2.1 Ventilation. Ventilation, either natural or mechanical, shall be provided in accordance with Chapter 4 of the International Mechanical Code. Where mechanical ventilation is provided, the system shall be configured to provide no greater than 150 percent of the minimum outdoor air required by Chapter 4 of the International Mechanical Code or other applicable code or standard, whichever is greater.
EXCEPTIONS:
1. The mechanical system may supply outdoor air at rates higher than the limit above when it is used for particulate or VOC dilution, economizer, night flushing, dehumidification, pressurization, exhaust make-up, or other process air delivery. Outdoor air shall be reduced to the minimum ventilation rates when not required for the preceding uses.
 
2. Air systems supplying Group R-1, R-2 or I-2 occupancies.
 
3. Alterations that replace less than half of the total heating and cooling capacity of the system.
 
4. Systems with energy recovery complying with the requirements of Section C403.7.6.1 that utilize sensible only active chilled beams for space cooling without any additional zonal fan power. Active chilled beams shall be permitted to utilize the increased outdoor airflow to increase space sensible capacity and to maintain space latent cooling loads without additional controls to reduce the outdoor airflow to each zone.
C403.2.2.2 Exhaust. Exhaust shall be provided in accordance with Chapters 4 and 5 of the International Mechanical Code. Where exhaust is provided, the system shall be configured to provide no greater than 150 percent of the minimum exhaust air required by Chapters 4 and 5 of the International Mechanical Code or other applicable code or standard, whichever is greater.
EXCEPTIONS:
1. The mechanical system may exhaust air at rates higher than the limit above when it is used for particulate or VOC dilution, economizer, night flushing, dehumidification, pressure equalization, relief, or other process exhaust air requirements. Outdoor air and exhaust air shall be reduced to the minimum ventilation rates when not required for the preceding uses.
 
2. Domestic range hood exhaust in Group R occupancies.
 
3. Exhaust from Group I occupancies.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40323Section C403.2.3((HVAC equipment performance requirements))Variable flow capacity.
C403.2.3 ((HVAC equipment performance requirements. Equipment shall meet the minimum efficiency requirements of Tables C403.2.3(1), C403.2.3(2), C403.2.3(3), C403.2.3(4), C403.2.3(5), C403.2.3(6), C403.2.3(7), C403.2.3(8) and C403.2.3(9) when tested and rated in accordance with the applicable test procedure. Plate-type liquid-to-liquid heat exchangers shall meet the minimum requirements of Table C403.2.3(10). The efficiency shall be verified through certification and listed under an approved certification program or, if no certification program exists, the equipment efficiency ratings shall be supported by data furnished by the manufacturer. Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy all stated requirements. Where components, such as indoor or outdoor coils, from different manufacturers are used, calculations and supporting data shall be furnished by the designer that demonstrates that the combined efficiency of the specified components meets the requirements herein.
Gas-fired and oil-fired forced air furnaces with input ratings ≥ 225,000 Btu/h (65 kW) and all unit heaters shall also have an intermittent ignition or interrupted device (IID), and have either mechanical draft (including power venting) or a flue damper. A vent damper is an acceptable alternative to a flue damper for furnaces where combustion air is drawn from the conditioned space. All furnaces with input ratings ≥ 225,000 Btu/h (65 kW), including electric furnaces, that are not located within the conditioned space shall have jacket losses not exceeding 0.75 percent of the input rating.
Chilled water plants and buildings with more than 500 tons total capacity shall not have more than 100 tons provided by air-cooled chillers.
EXCEPTIONS:
1. Where the designer demonstrates that the water quality at the building site fails to meet manufacturer's specifications for the use of water-cooled equipment.
 
2. Air-cooled chillers with minimum efficiencies at least 10 percent higher than those listed in Table C403.2.3(7).
 
3. Replacement of existing equipment.
C403.2.3.1 Water-cooled centrifugal chilling packages. Equipment not designed for operation at AHRI Standard 550/590 test conditions of 44°F (7°C) leaving chilled-water temperature and 2.4 gpm/ton evaporator fluid flow and 85°F (29°C) entering condenser water temperature with 3 gpm/ton (0.054 L/s • kW) condenser water flow shall have maximum full-load kW/ton (FL) and part-load ratings adjusted using Equations 4-7 and 4-8.
FL adj
=
FL/Kadj
(Equation 4-7)
PLVadj
=
IPLV/Kadj
(Equation 4-8)
Where:
 
Kadj
=
A × B
FL
=
Full-load kW/ton values as specified in Table C403.2.3(7)
FLadj
=
Maximum full-load kW/ton rating, adjusted for nonstandard conditions
IPLV
=
Value as specified in Table C403.2.3(7)
PLVadj
=
Maximum NPLV rating, adjusted for nonstandard conditions
A
=
0.00000014592 × (LIFT)4 - 0.0000346496 × (LIFT)3 + 0.00314196 × (LIFT)2 - 0.147199 × LIFT +  3.9302
B
=
0.0015 × LvgEvap (° F) +  0.934
LIFT
=
LvgCond - LvgEvap
LvgCond
=
Full-load condenser leaving fluid temperature (°F)
LvgEvap
=
Full-load evaporator leaving temperature (°F)
The FLadj and PLVadj values are only applicable for centrifugal chillers meeting all of the following full-load design ranges:
1. Minimum evaporator leaving temperature: 36°F.
2. Maximum condenser leaving temperature: 115°F.
3. LIFT is not less than 20°F (11.1°C) and not greater than 80°F (44.4°C).
C403.2.3.2 Positive displacement (air- and water-cooled) chilling packages. Equipment with a leaving fluid temperature higher than 32°F (0°C) and water-cooled positive displacement chilling packages with a condenser leaving fluid temperature below 115°F (46°C) shall meet the requirements of Table C403.2.3(7) when tested or certified with water at standard rating conditions, in accordance with the referenced test procedure.
C403.2.3.3 Packaged electric heating and cooling equipment. Packaged electric equipment providing both heating and cooling with a total cooling capacity greater than 6,000 Btu/h shall be a heat pump.
EXCEPTION:
Unstaffed equipment shelters or cabinets used solely for personal wireless service facilities.
C403.2.3.4 Humidification. If an air economizer is required on a cooling system for which humidification equipment is to be provided to maintain minimum indoor humidity levels, then the humidifier shall be of the adiabatic type (direct evaporative media or fog atomization type).
EXCEPTIONS:
1. Health care facilities licensed by the state where chapter 246-320 or 246-330 WAC requires steam injection humidifiers in duct work downstream of final filters.
 
2. Systems with water economizer.
 
3. 100% outside air systems with no provisions for air recirculation to the central supply fan.
 
4. Nonadiabatic humidifiers cumulatively serving no more than 10% of a building's air economizer capacity as measured in cfm. This refers to the system cfm serving rooms with stand alone or duct mounted humidifiers.))
Variable flow capacity. For fan and pump motors 7.5 hp and greater including motors in or serving custom and packaged air handlers serving variable air volume fan systems, constant volume fans, heating and cooling hydronic pumping systems, pool and service water pumping systems, domestic water pressure-booster systems, cooling tower fan, and other pump or fan motors where variable flows are required, there shall be:
1. Variable speed drives; or
2. Other controls and devices that will result in fan and pump motor demand of no more than 30 percent of design wattage at 50 percent of design air volume for fans when static pressure set point equals 1/3 the total design static pressure, and 50 percent of design water flow for pumps, based on manufacturer's certified test data. Variable inlet vanes, throttling valves (dampers), scroll dampers or bypass circuits shall not be allowed.
EXCEPTION:
Variable speed devices are not required for motors that serve:
 
1. Fans or pumps in packaged equipment where variable speed drives are not available as a factory option from the equipment manufacturer.
 
2. Fans or pumps that are required to operate only for emergency fire-life-safety events (e.g., stairwell pressurization fans, elevator pressurization fans, fire pumps, etc.).
AMENDATORY SECTION(Amending WSR 17-10-062, filed 5/2/17, effective 6/2/17)
WAC 51-11C-403231Table ((C403.2.3))C403.3.2(1)Minimum efficiency requirementsElectrically operated unitary air conditioners and condensing units.
Table ((C403.2.3))C403.3.2(1)A
Minimum Efficiency RequirementsElectrically Operated Unitary Air Conditioners and Condensing Units
Equipment Type
Size Category
Heating Section Type
Subcategory or Rating Condition
Minimum Efficiency
Test ProcedureA
Air conditioners, air cooled
< 65,000 Btu/hb
All
Split System
13.0 SEER
AHRI 210/240
Single Package
14.0 SEER
Through-the-wall
(air cooled)
≤ 30,000 Btu/hb
All
Split system
12.0 SEER
Single Package
12.0 SEER
Small duct high velocity,
air cooled
< 65,000 Btu/hb
All
Split system
11.0 SEER
Air conditioners,
air cooled
≥ 65,000 Btu/h
and
< 135,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
11.2 EER
12.9 IEER
AHRI 210/240
All other
Split System and Single Package
11.0 EER
12.7 IEER
≥ 135,000 Btu/h
and
< 240,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
11.0 EER
12.4 IEER
All other
Split System and Single Package
10.8 EER
12.2 IEER
≥ 240,000 Btu/h
and
< 760,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
10.0 EER
11.6 IEER
All other
Split System and Single Package
9.8 EER
11.4 IEER
≥ 760,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
9.7 EER
11.2 IEER
All other
Split System and Single Package
9.5 EER
11.6 IEER
Air conditioners,
water cooled
< 65,000 Btu/hb
All
Split System and Single Package
12.1 EER
12.3 IEER
AHRI 210/240
≥ 65,000 Btu/h
and
< 135,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
12.1 EER
13.9 IEER
AHRI 210/240
All other
Split System and Single Package
11.9 EER
13.7 IEER
≥ 135,000 Btu/h
and
< 240,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
12.5 EER
13.9 IEER
All other
Split System and Single Package
12.3 EER
13.7 IEER
≥ 240,000 Btu/h
and
< 760,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
12.4 EER
13.6 IEER
All other
Split System and Single Package
12.2 EER
13.4 IEER
≥ 760,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
12.2 EER
13.5 IEER
All other
Split System and Single Package
12.0 EER
13.3 IEER
Air conditioners,
evaporatively cooled
< 65,000 Btu/hb
All
Split System and Single Package
12.1 EER
12.3 IEER
AHRI 210/240
≥ 65,000 Btu/h
and
< 135,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
12.1 EER
12.3 IEER
AHRI 340/360
All other
Split System and Single Package
11.9 EER
12.1 IEER
≥ 135,000 Btu/h
and
< 240,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
12.0 EER
12.2 IEER
All other
Split System and Single Package
11.8 EER
12.0 IEER
≥ 240,000 Btu/h
and
< 760,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
11.9 EER
12.1 IEER
All other
Split System and Single Package
11.7 EER
11.9 IEER
≥ 760,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
11.7 EER
11.9 EER
All other
Split System and Single Package
11.5 EER
11.7 EER
Condensing units,
air cooled
≥ 135,000 Btu/h
 
 
10.5 EER
11.8 IEER
AHRI 365
Condensing units,
water cooled
≥ 135,000 Btu/h
 
 
13.5 EER
14.0 IEER
Condensing units,
evaporatively cooled
≥ 135,000 Btu/h
 
 
13.5 EER
14.0 IEER
For SI:
1 British thermal unit per hour = 0.2931 W.
a
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the reference year version of the test procedure.
b
Single-phase, air-cooled air conditioners less than 65,000 Btu/h are regulated by NAECA. SEER values are those set by NAECA.
Table ((C403.2.3))C403.3.2(1)B
Minimum Efficiency RequirementsElectrically Operated Variable Refrigerant Flow Air Conditioners
Equipment Type
Size Category
Heating
Section Type
Subcategory or Rating Condition
Minimum
Efficiency
Test
Procedure
VRF Air
Conditioners,
Air Cooled
< 65,000 Btu/h
All
VRF Multi-Split System
13.0 SEER
AHRI 1230
 
≥ 65,000 Btu/h and
< 135,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System
11.2 EER
((13.1 IEER
(before 1/1/2017)))
15.5 IEER
(((as of 1/1/2017)))
 
 
≥ 135,000 Btu/h and
< 240,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System
11.0 EER
((12.9 IEER
(before 1/1/2017)))
14.9 IEER
(((as of 1/1/2017)))
 
 
≥ 240,000 Btu/h
Electric
Resistance (or none)
VRF Multi-split System
10.0 EER
((11.6 IEER
(before 1/1/2017)))
13.9 IEER
(((as of 1/1/2017)))
 
Table ((C403.2.3))C403.3.2(1)C
Minimum Efficiency RequirementsElectrically Operated Variable Refrigerant Flow Air-to-Air and Applied Heat Pumps
Equipment Type
Size Category
Heating
Section Type
Subcategory or Rating Condition
Minimum
Efficiency
Test
Procedure
VRF Air Cooled (cooling mode)
< 65,000 Btu/h
All
VRF Multi-Split System
13.0 SEER
AHRI 1230
 
≥ 65,000 Btu/h and < 135,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System
11.0 EER
((12.9 IEER
(before 1/1/2017)))
14.6 IEER
(((as of 1/1/2017)))
 
 
≥ 65,000 Btu/h and < 135,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System with Heat Recovery
10.8 EER
((12.7 IEER
(before 1/1/2017)))
14.4 IEER
(((as of 1/1/2017)))
 
 
≥ 135,000 Btu/h and < 240,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System
10.6 EER
((12.3 IEER
(before 1/1/2017)))
13.9 IEER
(((as of 1/1/2017)))
 
 
≥ 135,000 Btu/h and < 240,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System with Heat Recovery
10.4 EER
((12.1 IEER
(before 1/1/2017)))
13.7 IEER
(((as of 1/1/2017)))
 
 
≥ 240,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System
9.5 EER
((11.0 IEER
(before 1/1/2017)))
12.7 IEER
(((as of 1/1/2017)))
 
 
≥ 240,000 Btu/h
Electric
Resistance (or none)
VRF Multi-Split System with Heat Recovery
9.3 EER
((10.8 IEER
(before 1/1/2017)))
12.5 IEER
(((as of 1/1/2017)))
 
VRF Water Source
(cooling mode)
< 65,000 Btu/h
All
VRF Multi-Split System
86ºF entering water
12.0 EER
16.0 IEER
AHRI 1230
 
< 65,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
86ºF entering water
11.8 EER
15.8 IEER
 
 
≥ 65,000 Btu/h and < 135,000 Btu/h
All
VRF Multi-Split System
86ºF entering water
12.0 EER
16.0 IEER
 
 
≥ 65,000 Btu/h and < 135,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
86ºF entering water
11.8 EER
15.8 IEER
 
 
≥ 135,000 Btu/h and < 240,000 Btu/h
All
VRF Multi-Split System
86ºF entering water
10.0 EER
14.0 IEER
 
 
≥ 135,000 Btu/h and < 240,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
86ºF entering water
9.8 EER
13.8 IEER
 
 
≥ 240,000 Btu/h
All
VRF Multi-Split System
86ºF entering water
12.0 IEER
 
 
≥ 240,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
86ºF entering water
11.8 IEER
 
VRF
Groundwater Source (cooling mode)
< 135,000 Btu/h
All
VRF Multi-Split System
59ºF entering water
16.2 EER
AHRI 1230
< 135,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
59ºF entering water
16.0 EER
 
 
≥ 135,000 Btu/h
All
VRF Multi-Split System
59ºF entering water
13.8 EER
 
 
≥ 135,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
59ºF entering water
13.6 EER
 
VRF Ground Source (cooling mode)
< 135,000 Btu/h
All
VRF Multi-Split System
77ºF entering water
13.4 EER
AHRI 1230
 
< 135,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
77ºF entering water
13.2 EER
 
 
≥ 135,000 Btu/h
All
VRF Multi-Split System
77ºF entering water
11.0 EER
 
 
≥ 135,000 Btu/h
All
VRF Multi-Split System with Heat Recovery
77ºF entering water
10.8 EER
 
VRF Air Cooled (heating mode)
< 65,000 Btu/h
(cooling capacity)
VRF Multi-Split System
7.7 HSPF
AHRI 1230
 
≥ 65,000 Btu/h and < 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
47ºF db/43ºF wb outdoor air
17ºF db/15ºF wb outdoor air
3.3 COP
2.25 COP
 
 
≥ 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
47ºF db/43ºF wb outdoor air
17ºF db/15ºF wb outdoor air
3.2 COP
2.05 COP
 
VRF Water Source
(heating mode)
< 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
68ºF entering water
((4.2))4.3 COP
AHRI 1230
 
≥ 135,000 Btu/h and < 240,000 Btu/h
(cooling capacity)
VRF Multi-Split System
68ºF entering water
((3.9))4.0 COP
 
 
≥ 240,000 Btu/h
(cooling capacity)
VRF Multi-Split System
68ºF entering water
3.9 COP
 
VRF Groundwater Source
(heating mode)
< 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
50ºF entering water
3.6 COP
AHRI 1230
 
≥ 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
50ºF entering water
3.3 COP
 
VRF Ground Source
(heating mode)
< 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
32ºF entering water
3.1 COP
AHRI 1230
 
≥ 135,000 Btu/h
(cooling capacity)
VRF Multi-Split System
32ºF entering water
2.8 COP
 
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403232Table ((C403.2.3))C403.3.2(2)Minimum efficiency requirementsElectrically operated unitary and applied heat pumps.
Table ((C403.2.3))C403.3.2(2)
Minimum Efficiency RequirementsElectrically Operated Unitary and Applied Heat Pumps
Equipment Type
Size Category
Heating Section Type
Subcategory or
Rating Condition
Minimum
Efficiency
Test Procedurea
Air cooled (cooling mode)
< 65,000 Btu/hb
All
Split System
14.0 SEER
AHRI 210/240
 
 
 
Single Packaged
14.0 SEER
 
Through-the-wall, air cooled (cooling mode)
≤ 30,000 Btu/hb
All
Split System
12.0 SEER
 
 
 
 
Single Packaged
12.0 SEER
 
Small duct high velocity,
air cooled
< 65,000 Btu/hb
All
Split System
11.0 SEER
 
Air cooled (cooling mode)
≥ 65,000 Btu/h and
< 135,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
11.0 EER
12.2 IEER
AHRI 340/360
 
 
All Other
Split System and Single Package
10.8 EER
12.0 IEER
 
 
≥ 135,000 Btu/h and < 240,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
10.6 EER
11.6 IEER
 
 
 
All Other
Split System and Single Package
10.4 EER
11.4 IEER
 
 
≥ 240,000 Btu/h
Electric Resistance (or None)
Split System and Single Package
9.5 EER
10.6 IEER
 
 
 
All Other
Split System and Single Package
9.3 EER
10.4 IEER
 
Water ((source))to air, water loop (cooling mode)
< 17,000 Btu/h
All
86°F entering water
12.2 EER
ISO 13256-1
 
≥ 17,000 Btu/h and
< 65,000 Btu/h
All
86°F entering water
13.0 EER
 
 
≥ 65,000 Btu/h and
< 135,000 Btu/h
All
86°F entering water
13.0 EER
 
Water to air, ground water ((source)) (cooling mode)
< 135,000 Btu/h
All
59°F entering water
18.0 EER
 
((Ground water source))Brine to air, ground loop (cooling mode)
< 135,000 Btu/h
All
77°F entering water
14.1 EER
 
((Water-source))Water to water, water loop (cooling mode)
< 135,000 Btu/h
All
86°F entering water
10.6 EER
ISO 13256-2
Water to water, ground water (cooling mode)
< 135,000 Btu/h
All
59°F entering water
16.3 EER
 
((Ground water source))Brine to water, ground loop (cooling mode)
< 135,000 Btu/h
All
77°F entering fluid
12.1 EER
 
Air cooled (heating mode)
< 65,000 Btu/hb
Split System
8.2 HSPF
AHRI 210/240
 
 
Single Package
8.0 HSPF
 
Through-the-wall, (air cooled, heating mode)
≤ 30,000 Btu/hb (cooling capacity)
Split System
7.4 HSPF
 
 
 
Single Package
7.4 HSPF
 
Small-duct high velocity (air cooled, heating mode)
< 65,000 Btu/hb
Split System
6.8 HSPF
 
Air cooled
(heating mode)
≥ 65,000 Btu/h and
< 135,000 Btu/h (cooling capacity)
47°F db/43ºF wb Outdoor Air
3.3 COP
AHRI 340/360
 
 
 
17ºF db/15ºF wb Outdoor Air
2.25 COP
 
 
≥ 135,000 Btu/h (cooling capacity)
47°F db/43ºF wb Outdoor Air
3.2 COP
 
 
 
 
17ºF db/15ºF wb Outdoor Air
2.05 COP
 
Water ((source))to air, water loop (heating mode)
< 135,000 Btu/h (cooling capacity)
68°F entering water
4.3 COP
ISO 13256-1
Water to air, ground water ((source)) (heating mode)
< 135,000 Btu/h (cooling capacity)
50°F entering water
3.7 COP
 
((Ground source))Brine to air, ground loop (heating mode)
< 135,000 Btu/h (cooling capacity)
32°F entering fluid
3.2 COP
 
((Water-source))Water to water, water loop (heating mode)
< 135,000 Btu/h (cooling capacity)
68°F entering water
3.7 COP
ISO 13256-2
 
 
50°F entering water
3.1 COP
 
((Ground source))Brine to water, ground loop (heating mode)
< 135,000 Btu/h (cooling capacity)
32°F entering fluid
2.5 COP
 
For SI:
1 British thermal unit per hour = 0.2931 W, °C = [(°F) - 32]/1.8.
a
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the reference year version of the test procedure.
b
Single-phase, air-cooled air conditioners less than 65,000 Btu/h are regulated by NAECA. SEER values are those set by NAECA.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403233Table ((C403.2.3))C403.3.2(3)Minimum efficiency requirementsElectrically operated PTAC, PTHP, SPVAC, SPVHP, room air conditioners.
Table ((C403.2.3))C403.3.2(3)
Minimum Efficiency RequirementsElectrically Operated Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Single-Package Vertical Air Conditioners, Single-Package Vertical Heat Pumps, Room Air Conditioners and Room Air-Conditioner Heat Pumps
 
 
 
Minimum Efficiency
 
Equipment Type
Size Category (Input)
Subcategory or Rating Condition
 
 
Test Procedurea
PTAC (cooling mode) new construction
All Capacities
95°F db outdoor air
 
14.0 - (0.300 × Cap/1000) EER
AHRI 310/380
PTAC (cooling mode) replacementsb
All Capacities
95°F db outdoor air
 
10.9 - (0.213 × Cap/1000) EER
 
PTHP (cooling mode) new construction
All Capacities
95°F db outdoor air
 
14.0 - (0.300 × Cap/1000) EER
 
PTHP (cooling mode) replacementsb
All Capacities
95°F db outdoor air
 
10.8 - (0.213 × Cap/1000) EER
 
PTHP (heating mode) new construction
All Capacities
 
3.7 - (0.052 × Cap/1000) COP
 
PTHP (heating mode) replacementsb
All Capacities
 
2.9 - (0.026 × Cap/1000) COP
 
SPVAC (cooling mode)
< 65,000 Btu/h
95°F db/75°F wb outdoor air
 
((10.0))11.0 EER
AHRI 390
 
≥ 65,000 Btu/h and
< 135,000 Btu/h
95°F db/75°F wb outdoor air
 
((10.0))11.0 EER
 
 
≥ 135,000 Btu/h and
< 240,000 Btu/h
95°F db/75°F wb outdoor air
 
((10.0))11.0 EER
 
SPVHP (cooling mode)
< 65,000 Btu/h
95°F db/75°F wb outdoor air
 
((10.0))11.0 EER
 
 
≥ 65,000 Btu/h and
< 135,000 Btu/h
95°F db/75°F wb outdoor air
 
((10.0))11.0 EER
 
 
≥ 135,000 Btu/h and
< 240,000 Btu/h
95°F db/75°F wb outdoor air
 
((10.0))11.0 EER
 
SPVHP (heating mode)
<65,000 Btu/h
47°F db/43°F wb outdoor air
 
((3.0))3.3 COP
AHRI 390
 
≥ 65,000 Btu/h and
< 135,000 Btu/h
47°F db/43°F wb outdoor air
 
((3.0))3.3 COP
 
 
≥ 135,000 Btu/h and
< 240,000 Btu/h
47°F db/43°F wb outdoor air
 
((3.0))3.3 COP
 
Room air conditioners, with louvered sides
< 6,000 Btu/h
 
((9.7 SEER))
11.0 CEER
ANSI/AHA-MRAC-1
 
≥ 6,000 Btu/h and
< 8,000 Btu/h
 
((9.7 SEER))
11.0 CEER
 
 
≥ 8,000 Btu/h and
< 14,000 Btu/h
 
((9.8 EER))
10.9 CEER
 
 
≥ 14,000 Btu/h and
< 20,000 Btu/h
 
((9.7 SEER))
10.7 CEER
 
 
≥ 20,000 Btu/h and
< 25,000 Btu/h
 
9.4 CEER
 
 
≥ ((20,000))25,000 Btu/h
 
((8.5 EER))
9.0 CEER
 
Room air conditioners, without louvered sides
((< 8,000 Btu/h))
< 6,000 Btu/h
 
((9.0 EER))
10.0 CEER
 
 
≥ 6,000 Btu/h and
< 8,000 Btu/h
 
10.0 CEER
 
 
≥ 8,000 Btu/h and
< 11,000 Btu/h
 
9.6 CEER
 
 
≥ ((8,000))11,000 Btu/h and
< ((20,000))14,000 Btu/h
 
((8.5 EER))
9.5 CEER
 
 
≥ 14,000 Btu/h and < 20,000 Btu/h
 
9.3 CEER
 
 
≥ 20,000 Btu/h
 
((8.5 EER))
9.4 CEER
 
Room air-conditioner heat pumps with louvered sides
< 20,000 Btu/h
 
((9.0 EER))
9.8 CEER
 
 
≥ 20,000 Btu/h
 
((8.5 EER))
9.3 CEER
 
Room air-conditioner heat pumps without louvered sides
< 14,000 Btu/h
 
((8.5 EER))
9.3 CEER
 
 
≥ 14,000 Btu/h
 
((8.0 EER))
8.7 CEER
 
Room air conditioner casement only
All capacities
 
((8.7 EER))
9.5 CEER
 
Room air conditioner casement-slider
All capacities
 
((9.5 EER))
10.4 CEER
 
For SI:
1 British thermal unit per hour = 0.2931 W, °C = [(°F) - 32]/1.8.
 
"Cap" = The rated cooling capacity of the product in Btu/h. If the unit's capacity is less than 7000 Btu/h, use 7000 Btu/h in the calculation. If the unit's capacity is greater than 15,000 Btu/h, use 15,000 Btu/h in the calculations.
a
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure.
b
Replacement unit shall be factory labeled as follows: "manufactured for nonstandard size applications only; not to be installed in new standard projects" or "manufactured for replacement applications only: not to be installed in new construction projects." Replacement efficiencies apply only to units with existing sleeves less than 16 inches (406 mm) in height and less than 42 inches (1067 mm) in width.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-403234Table ((C403.2.3))C403.3.2(4)—Minimum efficiency requirements—Warm air furnaces and unit heaters.
Table ((403.2.3))403.3.2(4)
Warm Air Furnaces and Combination Warm Air Furnaces/Air-Conditioning Units, Warm Air Duct Furnaces and Unit Heaters, Minimum Efficiency Requirements
Equipment Type
Size Category (Input)
Subcategory or Rating Condition
Minimum Efficiencyd, e
Test Procedurea
Warm air furnaces, gas fired
< 225,000 Btu/h
((78))80% AFUE or 80% Etc
DOE 10 C.F.R. Part 430 or ANSI Z21.47
 
≥ 225,000 Btu/h
Maximum capacityc
80% Etf
ANSI Z21.47
Warm air furnaces, oil fired
< 225,000 Btu/h
((78))83% AFUE or 80% Etc
DOE 10 C.F.R. Part 430 or UL 727
 
≥ 225,000 Btu/h
Maximum capacityb
81% Etg
UL 727
Warm air duct furnaces, gas fired
All capacities
Maximum capacityb
80% Ec
ANSI Z83.8
Warm air unit heaters, gas fired
All capacities
Maximum capacityb
80% Ec
ANSI Z83.8
Warm air unit heaters, oil fired
All capacities
Maximum capacityb
80% Ec
UL 731
For SI:
1 British thermal unit per hour = 0.2931 W.
a
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure.
b
Minimum and maximum ratings as provided for and allowed by the unit's controls.
c
Combination units not covered by the National Appliance Energy Conservation Act of 1987 (NAECA) (3-phase power or cooling capacity greater than or equal to 65,000 Btu/h [19 kW]) shall comply with either rating.
 
dEt
=
Thermal efficiency. See test procedure for detailed discussion.
 
eEc
=
Combustion efficiency (100% less flue losses). See test procedure for detailed discussion.
 
fEc
=
Combustion efficiency. Units must also include an IID, have jackets not exceeding 0.75 percent of the input rating, and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for those furnaces where combustion air is drawn from the conditioned space.
 
gEt
=
Thermal efficiency. Units must also include an IID, have jacket losses not exceeding 0.75 percent of the input rating, and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for those furnaces where combustion air is drawn from the conditioned space.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403235Table ((C403.2.3))C403.3.2(5)Minimum efficiency requirementsGas- and oil-fired boilers.
Table ((C403.2.3))C403.3.2(5)
Minimum Efficiency RequirementsGas- and Oil-Fired Boilers
Equipment Typea
Subcategory or Rating Condition
Size Category (Input)
Minimum Efficiency
Test Procedure
Boilers, hot water
Gas-fired
< 300,000 Btu/hd,e
82% AFUE
10 C.F.R. Part 430
 
 
≥ 300,000 Btu/h and
≤ 2,500,000 Btu/hb
80% Et
10 C.F.R. Part 431
 
 
˃ 2,500,000 Btu/ha
82% Ec
 
 
Oil-firedc
< 300,000 Btu/he
84% AFUE
10 C.F.R. Part 430
 
 
≥ 300,000 Btu/h and
≤ 2,500,000 Btu/hb
82% Et
10 C.F.R. Part 431
 
 
˃ 2,500,000 Btu/ha
84% Ec
 
Boilers, steam
Gas-fired
< 300,000 Btu/hd
80% AFUE
10 C.F.R. Part 430
 
Gas-fired - All, except natural draft
≥ 300,000 Btu/h and
≤ 2,500,000 Btu/hb
79% Et
10 C.F.R. Part 431
 
 
˃ 2,500,000 Btu/ha
79% Et
 
 
Gas-fired-natural draft
≥ 300,000 Btu/h and
≤ 2,500,000 Btu/hb
((77))79% Et
 
 
 
˃ 2,500,000 Btu/ha
((77))79% Et
 
 
Oil-firedc
< 300,000 Btu/h
82% AFUE
10 C.F.R. Part 430
 
 
≥ 300,000 Btu/h and
≤ 2,500,000 Btu/hb
81% Et
10 C.F.R. Part 431
 
 
˃ 2,500,000 Btu/ha
81% Et
 
For SI:
1 British thermal unit per hour = 0.2931 W.
 
 
 
 
 
Ec
=
Combustion efficiency (100 percent less flue losses).
 
Et
=
Thermal efficiency. See referenced standard document for detailed information.
 
 
 
 
a
These requirements apply to boilers with rated input of 8,000,000 Btu/h or less that are not packaged boilers and to all packaged boilers. Minimum efficiency requirements for boilers cover all capacities of packaged boilers.
b
Maximum capacity minimum and maximum ratings as provided for and allowed by the unit's controls.
c
Includes oil-fired (residual).
d
Boilers shall not be equipped with a constant burning ignition pilot.
e
A boiler not equipped with a tankless domestic water heating coil shall be equipped with an automatic means for adjusting the temperature of the water such that an incremental change in inferred heat load produces a corresponding incremental change in the temperature of the water supplied.
AMENDATORY SECTION(Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-403236Table ((C403.2.3))C403.3.2(6)Reserved.
Table ((C403.2.3))C403.3.2(6)
Reserved
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403237Table ((C403.2.3))C403.3.2(7)Minimum efficiency requirementsWater chilling packages.
Table ((C403.2.3))C403.3.2(7)
Minimum Efficiency RequirementsWater Chilling Packagesa
Equipment Type
Size Category
Units
((As of 1/1/2015b))
Test Procedurec
Path A
Path B
Full Load
IPLV
Full Load
IPLV
Air-cooled chillers
< 150 tons
EER
≥ 10.100
≥ 13.700
≥ 9.700
≥ 15.800
 
≥ 150 tons
EER
≥ 10.100
≥ 14.000
≥ 9.700
≥ 16.100
 
Air cooled without condenser, electrically operated
All capacities
EER
Air-cooled chillers without condensers shall be rated with matching condensers and comply with the air-cooled chiller efficiency requirements
 
((Water cooled, electrically operated, reciprocating
All capacities
kW/ton
Reciprocating units shall comply with water cooled positive displacement efficiency requirements))
 
Water cooled, electrically operated, positive displacement
< 75 tons
kW/ton
≤ 0.750
≤ 0.600
≤ 0.780
≤ 0.500
 
≥ 75 tons and
< 150 tons
kW/ton
≤ 0.720
≤ 0.560
≤ 0.750
≤ 0.490
AHRI 550/590
≥ 150 tons and
< 300 tons
kW/ton
≤ 0.660
≤ 0.540
≤ 0.680
≤ 0.440
 
≥ 300 tons and
< 600 tons
kW/ton
≤ 0.610
≤ 0.520
≤ 0.625
≤ 0.410
 
 
≥ 600 tons
kW/ton
≤ 0.560
≤ 0.500
≤ 0.585
≤ 0.380
 
Water cooled, electrically operated, centrifugal
< 150 tons
kW/ton
0.610
≤ 0.550
≤ 0.695
≤ 0.440
 
≥ 150 tons and
< 300 tons
kW/ton
≤ 0.610
≤ 0.550
≤ 0.695
≤ 0.400
 
≥ 300 tons and
< 400 tons
kW/ton
≤ 0.560
≤ 0.520
≤ 0.595
≤ 0.390
 
≥ 400 tons
kW/ton
≤ 0.560
≤ 0.500
≤ 0.585
≤ 0.380
 
Air cooled, absorption single effect
All capacities
COP
≥ 0.600
NR
NA
NA
 
Water cooled, absorption single effect
All capacities
COP
≥ 0.700
NR
NA
NA
AHRI 560
Absorption double effect, indirect fired
All capacities
COP
≥ 1.000
≥ 1.050
NA
NA
Absorption double effect, direct fired
All capacities
COP
≥ 1.000
≥ 1.000
NA
NA
 
For SI:
1 ton = 3517 W, 1 British thermal unit per hour = 0.2931 W, °C = [(°F) - 32]/1.8.
 
NA = Not applicable, not to be used for compliance;
 
NR = No requirement.
a
The centrifugal chiller equipment requirements, after adjustment in accordance with Section ((C403.2.3.1))C403.3.2.2 or Section ((C403.2.3.2))C403.3.2.3, do not apply to chillers used in low-temperature applications where the design leaving fluid temperature is less than 36ºF. The requirements do not apply to positive displacement chillers with leaving fluid temperatures less than or equal to 32ºF. The requirements do not apply to absorption chillers with design leaving fluid temperatures less than 40ºF.
b
Compliance with this standard can be obtained by meeting the minimum requirements of Path A or B. However, both the full load and IPLV shall be met to fulfill the requirements of Path A or B.
c
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 17-10-062, filed 5/2/17, effective 6/2/17)
WAC 51-11C-403238Table ((C403.2.3))C403.3.2(8)Minimum efficiency requirementsHeat rejection equipment.
Table ((C403.2.3))C403.3.2(8)
Minimum Efficiency RequirementsHeat Rejection Equipment
Equipment Typea
Total System Heat Rejection Capacity at Rated Conditions
Subcategory or Rating Condition
Performance
Requiredb,c,d,g,h
Test Proceduree,f
Propeller or axial fan open circuit cooling towers
All
95°F Entering Water
85°F Leaving Water
75°F Entering wb
≥ ((38.2))40.2 gpm/hp
CTI ATC-105 and CTI STD-201 RS
Centrifugal fan open circuit cooling towers
All
95°F Entering Water
85°F Leaving Water
75°F Entering wb
≥ 20.0 gpm/hp
CTI ATC-105 and CTI STD-201 RS
Propeller or axial fan closed circuit cooling towers
All
102°F Entering Water
90°F Leaving Water
75°F Entering wb
≥ ((14.0))16.1 gpm/hp
CTI ATC-105S and CTI STD-201 RS
Centrifugal closed circuit cooling towers
All
102°F Entering Water
90°F Leaving Water
75°F Entering wb
≥ 7.0 gpm/hp
CTI ATC-105S and CTI STD-201 RS
Propeller or axial fan evaporative condensers
All
R-507A Test Fluid
165°F Entering Gas Temperature
105°F Condensing Temperature
75°F Entering wb
≥ 157,000
Btu/h • hp
CTI ATC-106
Propeller or axial fan evaporative condensers
All
Ammonia Test Fluid
140°F Entering Gas Temperature
96.3°F Condensing Temperature
75°F Entering wb
≥ 134,000
Btu/h • hp
CTI ATC-106
Centrifugal fan evaporative condensers
All
R-507A Test Fluid
165°F Entering Gas Temperature
105°F Condensing Temperature
75°F Entering wb
≥ 135,000
Btu/h • hp
CTI ATC-106
Centrifugal fan evaporative condensers
All
Ammonia Test Fluid
140°F Entering Gas Temperature
96.3°F Condensing Temperature
75°F Entering wb
≥ 110,000
Btu/h • hp
CTI ATC-106
Air cooled condensers
All
125°F Condensing Temperature
R-22 Test Fluid
190°F Entering Gas Temperature
15°F Subcooling
95°F Entering db
≥ 176,000
Btu/h • hp
AHRI 460
For SI:
°C = [(°F) - 32]/1.8, L/s • kW = (gpm/hp)/(11.83), COP = (Btu/h • hp)/(2550.7).
 
db = dry-bulb temperature, °F;
 
wb = wet-bulb temperature, °F.
a
The efficiencies and test procedures for both open and closed circuit cooling towers are not applicable to hybrid cooling towers that contain a combination of wet and dry heat exchange sections.
((a))
b
For purposes of this table, open circuit cooling tower performance is defined as the water flow rating of the tower at the thermal rating condition ((listed in Table 403.2.3(8))) divided by the fan nameplate rated motor power.
c
For purposes of this table, closed circuit cooling tower performance is defined as the water flow rating of the tower at the thermal rating condition ((listed in Table 403.2.3(8))) divided by the sum of the fan nameplate rated motor power and the spray pump nameplate rated motor power.
d
For purposes of this table, air cooled condenser performance is defined as the heat rejected from the refrigerant divided by the fan nameplate rated motor power.
e
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure.
f
Where a certification program exists for a covered product, and it includes provisions for verification and challenge of equipment efficiency ratings, then the product shall be listed in the certification program, or, where a certification program exists for a covered product, and it includes provisions for verification and challenge of equipment efficiency ratings, but the product is not listed in the existing certification program, the ratings shall be verified by an independent laboratory test report.
g
Cooling towers shall comply with the minimum efficiency listed in the table for that specific type of tower with the capacity effect of any project-specific accessories and/or options included in the capacity of the cooling tower.
h
For purposes of this table, evaporative condenser performance is defined as the heat rejected at the specified rating condition in the table, divided by the sum of the fan motor nameplate power and the integral spray pump nameplate power.
i
Requirements for evaporative condensers are listed with ammonia (R-717) and R-507A as test fluids in this table. Evaporative condensers intended for use with halocarbon refrigerants other than R-507A must meet the minimum efficiency requirements listed above with R-507A as the test fluid.
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403239Table ((C403.2.3))C403.3.2(9) and Table ((C403.2.3))C403.3.2(10)Minimum efficiency requirements.
Table ((C403.2.3))C403.3.2(9)
Minimum Efficiency RequirementsAir Conditioners and Condensing Units Serving Computer Rooms
((Equipment Type
Net Sensible Cooling Capacitya
Minimum
SCOP-127b Efficiency
Downflow units/Upflow units
Test Procedure
Air conditioners,
air cooled
< 65,000 Btu/h
(< 19 kW)
2.20/2.09
ANSI/ASHRAE 127
≥ 65,000 Btu/h and < 240,000 Btu/h
( 19 kW and < 70 kW)
2.10/1.99
≥ 240,000 Btu/h
(≥ 70 kW)
1.90/1.79
Air conditioners,
water cooled
< 65,000 Btu/h
(< 19 kW)
2.60/2.49
ANSI/ASHRAE 127
≥ 65,000 Btu/h and < 240,000 Btu/h
(≥ 19 kW and < 70 kW)
2.50/2.39
≥ 240,000 Btu/h
(≥ 70 kW)
2.40/2.29
Air conditioners,
water cooled
with fluid economizer
< 65,000 Btu/h
(< 19 kW)
2.55/2.44
ANSI/ASHRAE 127
≥ 65,000 Btu/h and < 240,000 Btu/h
(≥ 19kW and < 70 kW)
2.45/2.34
≥ 240,000 Btu/h
(≥ 70 kW)
2.35/2.24
Air conditioners,
glycol cooled
(rated at 40% propylene glycol)
< 65,000 Btu/h
(< 19 kW)
2.50/2.39
ANSI/ASHRAE 127
≥ 65,000 Btu/h and < 240,000 Btu/h
(≥ 19 kW and < 70 kW)
2.15/2.04
≥ 240,000 Btu/h
(≥ 70 kW)
2.10/1.99
Air conditioners,
glycol cooled
(rated at 40% propylene glycol)
with fluid economizer
< 65,000 Btu/h
(< 19 kW)
2.45/2.34
ANSI/ASHRAE 127
≥ 65,000 Btu/h and < 240,000 Btu/h
(≥ 19 kW and < 70 kW)
2.10/1.99
≥ 240,000 Btu/h
(≥ 70 kW)
2.05/1.94
a
Net sensible cooling capacity: The total gross cooling capacity less the latent cooling less the energy to the air movement system. (Total Gross – Latent – Fan Power.)
b
Sensible coefficient of performance (SCOP-127): A ratio calculated by dividing the net sensible cooling capacity in watts by the total power input in watts (excluding reheaters and humidifiers) at conditions defined in ASHRAE Standard 127. The net sensible cooling capacity is the gross sensible capacity minus the energy dissipated into the cooled space by the fan system.))
Equipment Type
Net Sensible Cooling Capacity
Standard Model
Minimum Net Sensible COPc
Test Procedure
Return Air Dry-Bulb Temperature/Dew-Point Temperature
Class 1
Class 2
Class 3
75°F/52°F
85°F/52°F
95°F/52°F
Air cooled
< 65,000 Btu/h
Downflow unit
 
2.30
 
AHRI 1360
Upflow unit - Ducted
 
2.10
 
Upflow unit - Unducted
2.09
 
 
Horizontal-flow unit
 
 
2.45
≥ 65,000 Btu/h and < 240,000 Btu/h
Downflow unit
 
2.20
 
Upflow unit - Ducted
 
2.05
 
Upflow unit - Unducted
1.99
 
 
Horizontal-flow unit
 
 
2.35
≥ 240,000 Btu/h
Downflow unit
 
2.00
 
Upflow unit - Ducted
 
1.85
 
Upflow unit - Unducted
1.79
 
 
Horizontal-flow unit
 
 
2.15
Water cooled
< 65,000 Btu/h
Downflow unit
 
2.50
 
AHRI 1360
Upflow unit - Ducted
 
2.30
 
Upflow unit - Unducted
2.25
 
 
Horizontal-flow unit
 
 
2.70
≥ 65,000 Btu/h and < 240,000 Btu/h
Downflow unit
 
2.40
 
Upflow unit - Ducted
 
2.20
 
Upflow unit - Unducted
2.15
 
 
Horizontal-flow unit
 
 
2.60
≥ 240,000 Btu/h
Downflow unit
 
2.25
 
Upflow unit - Ducted
 
2.10
 
Upflow unit - Unducted
2.05
 
 
Horizontal-flow unit
 
 
2.45
Water cooled with fluid economizer
< 65,000 Btu/h
Downflow unit
 
2.45
 
AHRI 1360
Upflow unit - Ducted
 
2.25
 
Upflow unit - Unducted
2.20
 
 
Horizontal-flow unit
 
 
2.60
≥ 65,000 Btu/h and < 240,000 Btu/h
Downflow unit
 
2.35
 
Upflow unit - Ducted
 
2.15
 
Upflow unit - Unducted
2.10
 
 
Horizontal-flow unit
 
 
2.55
≥ 240,000 Btu/h
Downflow unit
 
2.20
 
Upflow unit - Ducted
 
2.05
 
Upflow unit - Unducted
2.00
 
 
Horizontal-flow unit
 
 
2.40
Glycol cooled
< 65,000 Btu/h
Downflow unit
 
2.30
 
AHRI 1360
Upflow unit - Ducted
 
2.10
 
Upflow unit - Unducted
2.00
 
 
Horizontal-flow unit
 
 
2.40
≥ 65,000 Btu/h and < 240,000 Btu/h
Downflow unit
 
2.05
 
Upflow unit - Ducted
 
1.85
 
Upflow unit - Unducted
1.85
 
 
Horizontal-flow unit
 
 
2.15
≥ 240,000 Btu/h
Downflow unit
 
1.95
 
Upflow unit - Ducted
 
1.80
 
Upflow unit - Unducted
1.75
 
 
Horizontal-flow unit
 
 
2.10
Glycol cooled with fluid economizer
< 65,000 Btu/h
Downflow unit
 
2.25
 
AHRI 1360
Upflow unit - Ducted
 
2.10
 
Upflow unit - Unducted
2.00
 
 
Horizontal-flow unit
 
 
2.35
≥ 65,000 Btu/h and < 240,000 Btu/h
Downflow unit
 
1.95
 
Upflow unit - Ducted
 
1.80
 
Upflow unit - Unducted
1.75
 
 
Horizontal-flow unit
 
 
2.10
≥ 240,000 Btu/h
Downflow unit
 
1.90
 
Upflow unit - Ducted
 
1.80
 
Upflow unit - Unducted
1.70
 
 
Horizontal-flow unit
 
 
2.10
Table ((C403.2.3))C403.3.2(10)
Minimum Efficiency RequirementsHeat Transfer Equipment
Equipment Type
Subcategory
Minimum
Efficiency
Test
Procedurea
Liquid-to-liquid heat exchangers
Plate type
NR
AHRI 400
NR = No requirement.
a
Chapter ((6))12 of the referenced standard contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure.
Table C403.3.2(11)
Minimum Efficiency Requirements: Electrically Operated DX-DOAS Units, Single-package and Remote Condenser, Without Energy Recovery
EQUIPMENT TYPE
SUBCATEGORY OR RATING CONDITION
MINIMUM EFFICIENCY
TEST PROCEDURE
Air cooled
(dehumidification mode)
 
4.0 ISMRE
AHRI 920
Air source heat pumps
(dehumidification mode)
 
4.0 ISMRE
AHRI 920
Water cooled
(dehumidification mode)
Cooling tower condenser water
4.9 ISMRE
AHRI 920
Chilled water
6.0 ISMRE
Air source heat pump
(heating mode)
 
2.7 ISCOP
AHRI 920
Water source heat pump
(dehumidification mode)
Ground source, closed loop
4.8 ISMRE
AHRI 920
Ground-water source
5.0 ISMRE
Water source
4.0 ISMRE
Water source heat pump
(heating mode)
Ground source, closed loop
2.0 ISCOP
AHRI 920
Ground-water source
3.2 ISCOP
Water source
3.5 ISCOP
Table C403.3.2(12)
Minimum Efficiency Requirements: Electrically Operated DX-DOAS Units, Single-package and Remote Condenser, with Energy Recovery
EQUIPMENT TYPE
SUBCATEGORY OR RATING CONDITION
MINIMUM EFFICIENCY
TEST PROCEDURE
Air cooled
(dehumidification mode)
 
5.2 ISMRE
AHRI 920
Air source heat pumps
(dehumidification mode)
 
5.2 ISMRE
AHRI 920
Water cooled
(dehumidification mode)
Cooling tower condenser water
5.3 ISMRE
AHRI 920
Chilled water
6.6 ISMRE
Air source heat pump
(heating mode)
 
3.3 ISCOP
AHRI 920
Water source heat pump
(dehumidification mode)
Ground source, closed loop
5.2 ISMRE
AHRI 920
Ground-water source
5.8 ISMRE
Water source
4.8 ISMRE
Water source heat pump
(heating mode)
Ground source, closed loop
3.8 ISCOP
AHRI 920
Ground-water source
4.0 ISCOP
Water source
4.8 ISCOP
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40324((Section C403.2.4HVAC system controls.))Reserved.
((C403.2.4 HVAC system controls. HVAC systems shall be provided with controls as defined in this section and shall be capable of and configured to implement all required control functions in this code.))
AMENDATORY SECTION(Amending WSR 16-24-070, filed 12/6/16, effective 5/1/17)
WAC 51-11C-403241((Section C403.2.4.1Thermostatic controls.))Reserved.
((C403.2.4.1 Thermostatic controls. The supply of heating and cooling energy to each zone shall be controlled by individual thermostatic controls capable of responding to temperature within the zone. Controls in the same zone or in neighboring zones connected by openings larger than 10 percent of the floor area of either zone shall not allow for simultaneous heating and cooling. At a minimum, each floor of a building shall be considered as a separate zone. Controls on systems required to have economizers and serving single zones shall have multiple cooling stage capability and activate the economizer when appropriate as the first stage of cooling. See Section C403.3.1 for further economizer requirements. Where humidification or dehumidification or both is provided, at least one humidity control device shall be provided for each humidity control system.
EXCEPTIONS:
1. Independent perimeter systems that are designed to offset only building envelope heat losses or gains or both serving one or more perimeter zones also served by an interior system provided:
 
1.1. The perimeter system includes at least one thermostatic control zone for each building exposure having exterior walls facing only one orientation (within +/-45 degrees) (0.8 rad) for more than 50 contiguous feet (15,240 mm);
 
1.2. The perimeter system heating and cooling supply is controlled by a thermostat located within the zones served by the system; and
 
1.3. Controls are configured to prevent the perimeter system from operating in a different heating or cooling mode from the other equipment within the zones or from neighboring zones connected by openings larger than 10 percent of the floor area of either zone.
 
2. Any interior zone open to a perimeter zone shall have setpoints and deadbands coordinated to that cooling in the interior zone shall not operate while the perimeter zone is in heating until the interior zone temperature is 5°F (2.8°C) higher than the perimeter zone temperature, unless the interior and perimeter zones are separated by a partition whose permanent openings are smaller than 10 percent of the perimeter zone floor area.
C403.2.4.1.1 Heat pump supplementary heat. Unitary air cooled heat pumps shall include microprocessor controls that minimize supplemental heat usage during start-up, set-up, and defrost conditions. These controls shall anticipate need for heat and use compression heating as the first stage of heat. Controls shall indicate when supplemental heating is being used through visual means (e.g., LED indicators). Heat pumps equipped with supplementary heaters shall be installed with controls that prevent supplemental heater operation above 40°F.
EXCEPTION:
Packaged terminal heat pumps (PTHPs) of less than 2 tons (24,000 Btu/hr) cooling capacity provided with controls that prevent supplementary heater operation above 40°F.
C403.2.4.1.2 Deadband. Where used to control both heating and cooling, zone thermostatic controls shall be configured to provide a temperature range or deadband of at least 5°F (2.8°C) within which the supply of heating and cooling energy to the zone is shut off or reduced to a minimum.
EXCEPTIONS:
1. Thermostats requiring manual changeover between heating and cooling modes.
 
2. Occupancies or applications requiring precision in indoor temperature control as approved by the code official.
C403.2.4.1.3 Setpoint overlap restriction. Where a zone has a separate heating and a separate cooling thermostatic control located within the zone, a limit switch, mechanical stop or direct digital control system with software programming shall be configured to prevent the heating set point from exceeding the cooling setpoint and to maintain a deadband in accordance with Section C403.2.4.1.2.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403242((Section C403.2.4.2Off-hour controls.))Reserved.
((C403.2.4.2 Off-hour controls. For all occupancies other than Group R, each zone shall be provided with thermostatic setback controls that are controlled by either an automatic time clock or programmable control system.
EXCEPTIONS:
1. Zones that will be operated continuously.
 
2. Zones with a full HVAC load demand not exceeding 6,800 Btu/h (2 kW) and having a readily accessible manual shutoff switch.
C403.2.4.2.1 Thermostatic setback. Thermostatic setback controls shall be configured to set back or temporarily operate the system to maintain zone temperatures down to 55°F (13°C) or up to 85°F (29°C).
C403.2.4.2.2 Automatic setback and shutdown. Automatic time clock or programmable controls shall be capable of starting and stopping the system for seven different daily schedules per week and retaining their programming and time setting during a loss of power for at least 10 hours. Additionally, the controls shall have a manual override that allows temporary operation of the system for up to 2 hours; a manually operated timer configured to operate the system for up to 2 hours; or an occupancy sensor.
C403.2.4.2.3 Automatic start capabilities. Automatic start controls shall be provided for each HVAC system. The controls shall be capable of automatically adjusting the daily start time of the HVAC system in order to bring each space to the desired occupied temperature immediately prior to scheduled occupancy.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403243((Section C403.2.4.3Shutoff dampers.))Reserved.
((C403.2.4.3 Shutoff dampers. Outdoor air supply, exhaust openings and relief outlets and stairway and shaft vents shall be provided with Class I motorized dampers.
Return air openings used for airside economizer operation shall be equipped with Class I motorized dampers.
Class 1 dampers shall have a maximum leakage rate of 4 cfm/ft2(20.3 L/s x m2) at 1.0 inch water gauge (w.g.) (249 Pa) when tested in accordance with AMCA 500D and shall be labeled by an approved agency for such purpose.
EXCEPTION:
Motorized dampers on return air openings in unitary packaged equipment that have the minimum leakage rate available from the manufacturer shall be deemed to comply.
Outdoor air intake and exhaust dampers shall be installed with automatic controls configured to close when the systems or spaces served are not in use or during unoccupied period warm-up and setback operation, unless the systems served require outdoor or exhaust air in accordance with the International Mechanical Code or the dampers are opened to provide intentional economizer cooling.
Stairway and shaft vent dampers shall be installed with automatic controls configured to open upon the activation of any fire alarm initiating device of the building's fire alarm system or the interruption of power to the damper.
EXCEPTIONS:
1. Gravity (nonmotorized) dampers shall be permitted to be used as follows:
 
1.1. Relief dampers serving systems less than 5,000 cfm total supply shall be permitted in buildings less than three stories in height.
 
1.2. Gravity (nonmotorized) dampers in Group R occupancies where the design outdoor air intake or exhaust capacity does not exceed 400 cfm (189 L/s).
 
2. Combustion air intakes.
Gravity (nonmotorized) dampers shall have an air leakage rate not greater than 20 cfm/ft2 (101.6 L/s x m2) where not less than 24 inches (610 mm) in either dimension and 40 cfm/ft2 (203.2 L/s x m2) where less than 24 inches (610 mm) in either dimension. The rate of air leakage shall be determined at 1.0 inch water gauge (249 Pa) when tested in accordance with AMCA 500D for such purpose. The dampers shall be labeled by an approved agency. Gravity dampers for ventilation air intakes shall be protected from direct exposure to wind.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403244((Section C403.2.4.4Zone isolation.))Reserved.
((C403.2.4.4 Zone isolation. HVAC systems serving zones that are over 25,000 square feet (2323 m2) in floor area or that span more than one floor and are designed to operate or be occupied nonsimultaneously shall be divided into isolation areas. Each isolation area shall be equipped with isolation devices and controls configured to automatically shut off the supply of conditioned air and outdoor air to and exhaust air from the isolation area. Each isolation area shall be controlled independently by a device meeting the requirements of Section C403.2.4.2.2. Central systems and plants shall be provided with controls and devices that will allow system and equipment operation for any length of time while serving only the smallest isolation area served by the system or plant.
EXCEPTIONS:
1. Exhaust air and outdoor air connections to isolation areas where the fan system to which they connect is not greater than 5,000 cfm (2360 L/s).
 
2. Exhaust airflow from a single isolation area of less than 10 percent of the design airflow of the exhaust system to which it connects.
 
3. Isolation areas intended to operate continuously or intended to be inoperative only when all other isolation areas in a zone are inoperative.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403245((Section C403.2.4.5Snowmelt and freeze protection controls.))Reserved.
((C403.2.4.5 Snow- and ice-melt system controls. Snow- and ice-melting systems, supplied through energy service to the building, shall include automatic controls configured to shut off the system when the pavement temperature is above 50°F (10°C) and no precipitation is falling and an automatic or manual control that is configured to shutoff when the outdoor temperature is above 40°F (4°C) so that the potential for snow or ice accumulation is negligible.
C403.2.4.6 Freeze protection system controls. Freeze protection systems, such as heat tracing of outdoor piping and heat exchangers, including self-regulating heat tracing, shall include automatic controls configured to shut off the systems when outdoor air temperatures are above 40°F (4°C) or when the conditions of the protected fluid will prevent freezing.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403246((Section C403.2.4.7Economizer fault detection and Section C403.2.4.8Combustion heating equipment controls.))Reserved.
((C403.2.4.7 Economizer fault detection and diagnostics (FDD). Air-cooled unitary direct-expansion units with a cooling capacity of 54,000 Btu/h or greater listed in Tables C403.2.3(1) through C403.2.3(3) that are equipped with an economizer in accordance with Section C403.3 shall include a fault detection and diagnostics (FDD) system complying with the following:
1. The following temperature sensors shall be permanently installed to monitor system operation:
1.1. Outside air.
1.2. Supply air.
1.3. Return air.
2. Temperature sensors shall have an accuracy of ±2°F (1.1°C) over the range of 40°F to 80°F (4°C to 26.7°C).
3. Refrigerant pressure sensors, where used, shall have an accuracy of ±3 percent of full scale.
4. The unit controller shall be configured to provide system status by indicating the following:
4.1. Free cooling available.
4.2. Economizer enabled.
4.3. Compressor enabled.
4.4. Heating enabled.
4.5. Mixed air low limit cycle active.
4.6. The current value of each sensor.
5. The unit controller shall be capable of manually initiating each operating mode so that the operation of compressors, economizers, fans and the heating system can be independently tested and verified.
6. The unit shall be configured to report faults to a fault management application accessible by day-to-day operating or service personnel or annunciated locally on zone thermostats.
7. The FDD system shall be configured to detect the following faults:
7.1. Air temperature sensor failure/fault.
7.2. Not economizing when the unit should be economizing.
7.3. Economizing when the unit should not be economizing.
7.4. Damper not modulating.
7.5. Excess outdoor air.
C403.2.4.8 Combustion heating equipment controls. Combustion heating equipment with a capacity over 225,000 Btu/h shall have modulating or staged combustion control.
EXCEPTIONS:
1. Boilers.
 
2. Radiant heaters.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403247((Sections C403.2.4.9 through C403.2.4.11Group R controls.))Reserved.
((C403.2.4.9 Group R-1 hotel/motel guest rooms. For hotel and motel guest rooms, a minimum of one of the following control technologies shall be required in hotels/motels with over 50 guest rooms such that the space temperature would automatically setback (winter) or set up (summer) by no less than 5°F (3°C) when the occupant is not in the room:
1. Controls that are activated by the room occupant via the primary room access method - Key, card, deadbolt, etc.
2. Occupancy sensor controls that are activated by the occupant's presence in the room.
C403.2.4.10 Group R-2 and R-3 dwelling units. The primary space conditioning system within each dwelling unit shall be provided with at least one programmable thermostat for the regulation of space temperature. The thermostat shall allow for, at a minimum, a 5-2 programmable schedule (weekdays/weekends) and be capable of providing at least two programmable setback periods per day.
Each additional system provided within the dwelling unit shall be provided with at least one adjustable thermostat for the regulation of temperature.
EXCEPTIONS:
1. Systems controlled by an occupant sensor that is configured to shut the system off when no occupant is sensed for a period of up to 30 minutes.
 
2. Systems controlled solely by a manually operated timer configured to operate the system for no more than two hours.
 
3. Ductless heat pumps.
Each thermostat shall be capable of being set by adjustment or selection of sensors and configured as follows: When used to control heating only: 55°F to 75°F; when used to control cooling only: 70°F to 85°F; all other: 55°F to 85°F with an adjustable deadband of not less than 10°F.
C403.2.4.11 Group R-2 sleeping units. The primary space conditioning system within each sleeping unit shall be provided with at least one programmable thermostat for the regulation of space temperature. The thermostat shall allow for, at a minimum, a 5-2 programmable schedule (weekdays/weekends) and be capable of providing at least two programmable setback periods per day.
Each additional system provided within the sleeping unit shall be provided with at least one adjustable thermostat for the regulation of temperature.
EXCEPTIONS:
1. Systems controlled by an occupant sensor that is configured to shut the system off when no occupant is sensed for a period of up to 30 minutes.
 
2. Systems controlled solely by a manually operated timer configured to operate the system for no more than two hours.
 
3. Zones with a full HVAC load demand not exceeding 3,400 Btu/h (1 kW) and having a readily accessible manual shutoff switch.
 
4. Ductless heat pumps.
Each thermostat shall be capable of being set by adjustment or selection of sensors and configured as follows: When used to control heating only: 55°F to 75°F; when used to control cooling only: 70°F to 85°F; all other: 55°F to 85°F with an adjustable deadband of not less than 10°F.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403248((Section C403.2.4.12Direct digital control systems.))Reserved.
((C403.2.4.12 Direct digital control systems. Direct digital control (DDC) shall be required as specified in Sections C403.2.4.12.1 through C403.2.4.12.3.
C403.2.4.12.1 DDC applications. DDC shall be provided in the applications and qualifications listed in Table C403.2.4.12.1.
C403.2.4.12.2 DDC controls. Where DDC is required by Section C403.2.4.12.1, the DDC system shall be capable of all of the following, as required to provide the system and zone control logic required in Sections C403.2, C403.3, and C403.4:
1. Monitoring zone and system demand for fan pressure, pump pressure, heating and cooling.
2. Transferring zone and system demand information from zones to air distribution system controllers and from air distribution systems to heating and cooling plant controllers.
C403.2.4.12.3 DDC display. Where DDC is required by Section C403.2.12.1 for new buildings, the DDC system shall be capable of trending and graphically displaying input and output points.
Table C403.2.4.12.1
DDC Applications and Qualifications
Building Status
Application
Qualifications
New building
Air-handling system and all zones served by the system
All air-handling systems in buildings with building cooling capacity greater than 780,000 Btu/h
Air-handling system and all zones served by the system
Individual systems supplying more than three zones and with fan system bhp of 10 hp and larger
Chilled-water plant and all coils and terminal units served by the system
Individual plants supplying more than three zones and with design cooling capacity of 300,000 Btu/h and larger
Hot-water plant and all coils and terminal units served by the system
Individual plants supplying more than three zones and with design heating capacity of 300,000 Btu/h and larger
Alteration or addition
Zone terminal unit such as VAV box
Where existing zones served by the same air-handling, chilled-water, or hot-water system have DDC
Air-handling system or fan coil
Where existing air-handling system(s) and fan coil(s) served by the same chilled- or hot-water plant have DDC
New air-handling system and all new zones served by the system
Individual systems with fan system bhp of 10 hp and larger and supplying more than three zones and more than 75% of zones are new
New or upgraded chilled-water plant
Where all chillers are new and plant design cooling capacity is 300,000 Btu/h and larger
New or upgraded hot-water plant
Where all boilers are new and plant design heating capacity is 300,000 Btu/h and larger))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403249((Section C403.2.5Hot water boiler controls.))Reserved.
((C403.2.5 Hot water boiler outdoor temperature setback control. Hot water boilers that supply heat to the building through one- or two-pipe heating systems shall have an outdoor setback control that lowers the boiler water temperature based on the outdoor temperature.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40325((Section C403.2.6Ventilation.))Reserved.
((C403.2.6 Ventilation. Ventilation, either natural or mechanical, shall be provided in accordance with Chapter 4 of the International Mechanical Code. Where mechanical ventilation is provided, the system shall be configured to provide no greater than 150 percent of the minimum outdoor air required by Chapter 4 of the International Mechanical Code or other applicable code or standard, whichever is greater.
EXCEPTIONS:
1. The mechanical system may supply outdoor air at rates higher than the limit above when it is used for particulate or VOC dilution, economizer, night flushing, dehumidification, pressurization, exhaust make-up, or other process air delivery. Outdoor air shall be reduced to the minimum ventilation rates when not required for the preceding uses.
 
2. Air systems supplying Group R-1, R-2 or I-2 occupancies.
 
3. Alterations that replace less than half of the total heating and cooling capacity of the system.
 
4. Systems with energy recovery complying with the requirements of Section C403.5.1.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403252((Section C403.2.6.2Demand control ventilation.))Reserved.
((C403.2.6.2 Demand controlled ventilation. Demand control ventilation (DCV) shall be provided for spaces larger than 500 square feet (50 m2) and with an occupant load greater than or equal to 25 people per 1000 square feet (93 m2) of floor area (as established in Table 403.3.1.1 of the International Mechanical Code) and served by systems with one or more of the following:
1. An air-side economizer;
2. Automatic modulating control of the outdoor air damper; or
3. A design outdoor airflow greater than 3,000 cfm (1416 L/s).
EXCEPTION:
Demand control ventilation is not required for systems and spaces as follows:
 
1. Systems with energy recovery complying with Section C403.5.1.
 
2. Multiple-zone systems without direct digital control of individual zones communicating with a central control panel.
 
3. System with a design outdoor airflow less than 750 cfm (354 L/s).
 
4. Spaces where the supply airflow rate minus any makeup or outgoing transfer air requirement is less than 1,200 cfm (566 L/s).
 
5. Ventilation provided for process loads only.
 
6. Spaces with one of the following occupancy categories (as defined by the International Mechanical Code): Correctional cells, daycare sickrooms, science labs, barbers, beauty and nail salons, and bowling alley seating.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403253((Section C403.2.6.3Occupancy sensors.))Reserved.
((C403.2.6.3 Occupancy sensors. Classrooms, gyms, auditoriums and conference rooms larger than 500 square feet of floor area shall have occupancy sensor control that will either close outside air dampers or turn off serving equipment when the space is unoccupied except where equipped with another means to automatically reduce outside air intake below design rates when spaces are partially occupied.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-403254((Section C403.2.6.4Loading dock and parking garage ventilation system controls.))Reserved.
((C403.2.6.4 Enclosed loading dock and parking garage exhaust ventilation system control. Mechanical ventilation systems for enclosed loading docks and parking garages shall be designed to exhaust the airflow rates (maximum and minimum) determined in accordance with the International Mechanical Code.
Ventilation systems shall be equipped with a control device that operates the system automatically by means of carbon monoxide detectors applied in conjunction with nitrogen dioxide detectors. Controllers shall be configured to shut off fans or modulate fan speed to 50 percent or less of design capacity, or intermittently operate fans less than 20 percent of the occupied time or as required to maintain acceptable contaminant levels in accordance with the International Mechanical Code provisions.
Gas sensor controllers used to activate the exhaust ventilation system shall stage or modulate fan speed upon detection of specified gas levels. All equipment used in sensor controlled systems shall be designed for the specific use and installed in accordance with the manufacturer's recommendations. The system shall be arranged to operate automatically by means of carbon monoxide detectors applied in conjunction with nitrogen dioxide detectors. Garages and loading docks shall be equipped with a controller and a full array of carbon monoxide (CO) sensors set to maintain levels of carbon monoxide below 35 parts per million (ppm). Additionally, a full array of nitrogen dioxide detectors shall be connected to the controller set to maintain the nitrogen dioxide level below the OSHA standard for eight hour exposure. Spacing and location of the sensors shall be installed in accordance with manufacturer recommendations.
C403.2.6.4.1 System activation devices for enclosed loading docks. Ventilation systems for enclosed loading docks shall be activated by one of the following:
1. Gas sensors installed in accordance with the International Mechanical Code; or
2. Occupant detection sensors used to activate the system that detects entry into the loading area along both the vehicle and pedestrian pathways.
C403.2.6.4.2 System activation devices for enclosed parking garages. Ventilation systems for enclosed parking garages shall be activated by gas sensors.
EXCEPTION:
A parking garage ventilation system having a total design capacity under 8,000 cfm may use occupant sensors.))
AMENDATORY SECTION(Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-40326((Section C403.2.7Exhaust systems.))Reserved.
((C403.2.7 Exhaust systems.
C403.2.7.1 Kitchen exhaust systems. Replacement air introduced directly into the exhaust hood cavity shall not be greater than 10 percent of the hood exhaust airflow rate. Conditioned supply air delivered to any space shall not exceed the greater of the following:
1. The ventilation rate required to meet the space heating or cooling load.
2. The hood exhaust flow minus the available transfer air from adjacent space where available transfer air is considered that portion of outdoor ventilation air not required to satisfy other exhaust needs, such as restrooms, and not required to maintain pressurization of adjacent spaces.
Where total kitchen hood exhaust airflow rate is greater than 2,000 cfm each hood shall be a factory built commercial exhaust hood listed by a nationally recognized testing laboratory in compliance with UL 710. Each hood shall have a maximum exhaust rate as specified in Table C403.2.7.1 and shall comply with one of the following:
1. Not less than 50 percent of all replacement air shall be transfer air that would otherwise be exhausted.
2. Demand ventilation systems on not less than 75 percent of the exhaust air that are configured to provide not less than a 50-percent reduction in exhaust and replacement air system airflow rates, including controls necessary to modulate airflow in response to appliance operation and to maintain full capture and containment of smoke, effluent and combustion products during cooking and idle.
3. Listed energy recovery devices with a sensible heat recovery effectiveness of not less than 40 percent on not less than 50 percent of the total exhaust airflow.
Where a single hood, or hood section, is installed over appliances with different duty ratings, the maximum allowable flow rate for the hood or hood section shall be based on the requirements for the highest appliance duty rating under the hood or hood section.
EXCEPTIONS:
1. Where not less than 75 percent of all the replacement air is transfer air that would otherwise be exhausted.
 
2. Certified grease extractor hoods that require a face velocity no greater than 60 fpm.
Table C403.2.7.1
Maximum Net Exhaust Flow Rate,
CFM Per Linear Foot of Hood Length
TYPE OF HOOD
LIGHT-DUTY
EQUIPMENT