WSR 01-16-120

PROPOSED RULES

BUILDING CODE COUNCIL


[ Filed July 31, 2001, 8:35 a.m. ]

Original Notice.

Preproposal statement of inquiry was filed as WSR 01-11-071.

Title of Rule: Amendment of chapter 51-11 WAC, Washington State Energy Code.

Purpose: To consider whether to amend the 2000 Edition of the Washington State Energy Code (chapter 51-11 WAC).

Statutory Authority for Adoption: RCW 19.27A.025 and 19.27A.045.

Statute Being Implemented: Chapters 19.27, 19.27A, and 34.05 RCW.

Summary: The proposed rules include adoption of amendments to the 2000 Washington State Energy Code, including increasing the energy efficiency for residential buildings and updating the mechanical equipment efficiencies for nonresidential buildings (see Explanation of Rule below for itemized list of proposed changes).

Reasons Supporting Proposal: RCW 19.27A.025 and 19.27A.045.

Name of Agency Personnel Responsible for Drafting and Implementation: Judith Darst, P.O. Box 48350, Olympia, WA 98504, (360) 725-2965; and Enforcement: Local jurisdictions.

Name of Proponent: Washington State Building Code Council, governmental.

Agency Comments or Recommendations, if any, as to Statutory Language, Implementation, Enforcement, and Fiscal Matters: The council is seeking comments on the issues proposed in the rules shown below.

Rule is not necessitated by federal law, federal or state court decision.

Explanation of Rule, its Purpose, and Anticipated Effects: The proposed rule amends chapter 51-11 WAC, Washington State Energy Code. The purpose is to amend the 2000 Washington State Energy Code, including increasing the energy efficiency for residential buildings and updating the mechanical equipment efficiencies for nonresidential buildings. The proposed amendments will provide greater simplicity, improved energy efficiency, and consistency, than the published version for application in Washington state.

Regulatory Review: In compliance with Executive Order 97-02, Regulatory Improvement, the following criteria for regulatory review will be considered at the time of final adoption of the rule.

1. Need. This rule is authorized by RCW 19.27A.025 and 19.27A.045. The council regularly reviews statewide amendment proposals to the Washington State Energy Code, and adopts the amendments as deemed appropriate. The purpose and objective of this review, as given in RCW 19.27.020, is to promote the health, safety and welfare of the occupants or users of buildings; to require minimum construction standards for the state of Washington; to permit the use of modern technical methods; to eliminate restrictive, obsolete, conflicting, duplicating and unnecessary regulations; and to provide standards to make buildings accessible to and usable by persons with physical disabilities. The technical advisory groups appointed by the council have identified rules that are obsolete, duplicative or ambiguous, and have proposed amendments and revisions.

2. Effectiveness and Efficiency. The mission of the council is to adopt building codes for uniform application throughout the state. In this special rule review at the request of the governor, the council examined regulatory alternatives and new technologies. The council has identified where alternatives can be used effectively and efficiently. The council efficiently achieves uniform state building codes by serving as the central administrative agency for statewide adoption of building codes.

3. Clarity. The council revised their filing procedure for state amendments to the national uniform codes. To enhance clarity, only those subsections with a state amendment will be filed under the main section number. The balance of the main section will remain as written in the national uniform code, as adopted by reference, unless otherwise noted. This reformatting change reorganizes and shortens the WACs.

4. Intent and Statutory Authority. The proposed rule is consistent with the legislative intent of the statute chapters 19.27 and 19.27A RCW. These statutes give the council sufficient authority to maintain the state building code, and to adopt amendments to the Washington State Energy Code.

5. Coordination. The council rule-making process has included participation by national, state, and local building, fire, mechanical and plumbing officials, as well as state agency representatives for the departments of social and health services, health, labor and industries, and the state fire marshal. The council actively seeks participation from other state agencies to assure that duplication and inconsistency is eliminated.

6. Cost. The council appointed technical advisory groups and an Economic and Regulatory Assessment Committee to examine the costs and benefits associated with the revisions to the building codes.

7. Fairness. The state amendments to the Washington State Energy Code proposed by the council are intended to mitigate disproportionate impact on the regulated community. The council is made up of representatives from the regulated community, as well as public and regulatory officials. In addition, the council enlisted the assistance of technical advisory groups, made up of the individuals, organizations and businesses impacted by the building codes, to review code changes and proposals.

Proposal Changes the Following Existing Rules: RESIDENTIAL:

1. Prescriptive Paths (Tables 6-1 through 6-6, Sections 601, 602, 603, 502.1.5) (TWO OPTIONS): Both options of this proposed amendment simplify the code by deleting the existing Tables 6-1 through 6-6 and replacing them with revised Tables 6-1 and 6-2. Also, both options increase the energy efficiency, eliminate the dual fuel element of the code, and reduce the number of overall paths. The difference between the two options is in the new Table 6-1, for 12% glazing, the wall insulation requirement:

Option 1: R-15 for both "Wall Above Grade" and "Wall interior Below Grade."

Option 2: R-13 for "Wall Above Grade" and R-19 for "Wall interior Below Grade."

2. Component Performance Paths (Table 5-1): This proposed amendment simplifies the code and increases the energy efficiency by deleting the dual fuel columns.

3. Glazing Area Calculations (Section 502.1.5.2 exception 3, 602.7.2 exception): These proposals revise two existing exceptions regarding glazing area calculations and clarify how to account for glazing in doors, single glazing for ornamental, security or architectural purposes, and double glazed garden windows.

4. Residential Mechanical Equipment Efficiencies (Section 503.4 and Tables 5-4 through 5-8): In conjunction with the proposed Nonresidential change #7, this proposed amendment first restates the present requirement: Compliance with the 1987 National Appliances Energy Conservation Act (NAECA). Also, for simplicity and consistency the remainder of Section 503.4 and Tables 5-4 through 5-8 are deleted and a reference to Section 1411 is inserted. Compliance with Section 1411 also includes compliance with the new Mechanical Equipment Efficiency Tables 14-1A through 14-1-G (ASHRAE/IESNA Standard 90.1.1999).

5. Prescriptive Heating System Sizing: (Chapter 9): In conjunction with the residential envelope revisions (proposals #1 and #2), this proposed amendment revises the heating system sizing calculations. The houses will be more efficient and therefore the design heat load needs to be reduced. Also, the dual fuel allowances were deleted to reflect the changes made in both the prescriptive path approach and the component performance approach (listed above).

6. Vertical Glazing U-factors for Small Businesses (Table 10-6B): This proposal amends Table 10-6B to provide flexibility for small window manufacturers.

NONRESIDENTIAL:

7. Mechanical Equipment Efficiency (Tables 14-1 through 14-3 and Section 1411): This proposed amendment deletes the existing equipment efficiency tables (Tables 14-1 through 14-3) and replaces them with Tables 14-1A through 14-1-G, the current national standard (ASHRAE/IESNA Standard 90.1.1999).

8. Dampers (Section 1412.4.1): This proposed amendment adds the word "motorized" to the damper requirement. It adds two new exceptions for nonmotorized dampers. It also requires a maximum leakage rate tested in accordance with AMCA Standard 500 and requires the drawings to indicate compliance.

9. Economizers (Sections 1401, 1413, 1423 and 1433): These proposed amendments makes clarifications to the installation of economizers, adds more comprehensive exceptions, addresses water economizers and humidification, and deletes the exception to Section 1401. These proposed changes provide for new technology, give more specific guidance for designed systems, and remove vague language that could result in obsolete and inefficient systems that increase costs for no appreciable gains.

10. Pool Water Heaters (Section 1452): This proposed amendment requires minimum efficiencies for pool water heaters.

A small business economic impact statement has been prepared under chapter 19.85 RCW.

Small Business Economic Impact Statement

In response to the governor's request related to the 2001 energy crisis, the State Building Code Council is proposing to adopt amendments to chapter 51-11 WAC, the Washington State Energy Code. The council appoints technical advisory groups (TAGs) to conduct a comprehensive review of proposed code amendments. The participants on the Energy Code TAG represent architects, mechanical engineers, illumination engineers, building officials, commercial contractors, manufacturers, model code organizations, homebuilders, utilities, mechanical contractors, state agencies, educators, and the general public. The Economic and Regulatory Assessment Committee consists of council members as specified in SBCC by-laws.

Proposed amendments to the following sections have been identified by the Energy Code TAG and the Economic and Regulatory Assessment Committee as having a cost impact on businesses required to comply with the rule. According to the definition established by the economic committee, these rules would impose a moderate first cost increase on businesses required to comply. A moderate cost is defined as greater than 1/4 of 1% but less than 1% of the total construction cost.

However, the increases do not represent a disproportionate cost to small business and if any additional first cost of construction is passed on to consumers, it will be completely offset by the consumer's energy savings.

Chapter 51-11 WAC, Tables 5-1, 6-1, and 6-2: For Group R (residential) construction, the proposed rule makes envelope U-factor improvements and simplifies the prescriptive path approach. Current estimates show 18% of homes in this category use tradeoffs to reduce wall insulation. Baseline window U-factors would prohibit use of aluminum framed windows under prescriptive compliance. Manufacturers of window products would be impacted since in most cases, the new window requirements will call for low-e coatings.

Chapter 51-11 WAC, Tables 14-1A through 14-1G: This proposed rule brings the mechanical equipment efficiency requirements up to the current national standard (ASHRAE/IESNA Standard 90.1.1999). Since the national efficiencies will be effective before this code requirement would go into effect, any additional cost would not be attributed to the code. In any case, the increase in cost would be categorized as a minor cost. A minor cost is defined as less than/equal to 1/4 of 1% of the total construction cost.

A copy of the statement may be obtained by writing to Tim Nogler, Managing Director, Washington State Building Code Council, P.O. Box 48350, Olympia, WA 98504-8350, phone (360) 725-2969, fax (360) 586-9383.

RCW 34.05.328 does not apply to this rule adoption. The State Building Code Council is not listed in this section as one of the agencies required to comply with this regulation.

Hearing Location: Spokane City Council Chambers, West 808 Spokane Falls Boulevard, Spokane, WA, on September 14, 2001, at 9:00 a.m.; and at the Auburn City Hall, 25 West Main Street, Auburn, WA, on October 12, 2001, at 1:00 p.m.

Assistance for Persons with Disabilities: Contact Patti Thorn by September 1, 2001, at (360) 725-2966, TDD (360) 753-2200.

Submit Written Comments to: Jim Lewis, Chairman, State Building Code Council, P.O. Box 48350, Olympia, WA 98504-8350, fax (360) 586-9383, by October 12, 2001.

Date of Intended Adoption: November 9, 2001.

July 13, 2001

Tim Nogler

for James M. Lewis

Council Chair

OTS-4961.2


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0502   Building envelope requirements.  


502.1 General:


502.1.1: The stated U- or F-factor of any component assembly, listed in Table 5-1 or 5-2, such as roof/ceiling, opaque wall or opaque floor may be increased and the U-factor for other components decreased, provided that the total heat gain or loss for the entire building envelope does not exceed the total resulting from compliance to the U-factors specified in this Section.


The U-factors for typical construction assemblies are included in Chapter 10. These values shall be used for all calculations. Where proposed construction assemblies are not represented in Chapter 10, values shall be calculated in accordance with Chapters 21-29 in Standard RS-1 listed in Chapter 7, using the framing factors listed in Chapter 10 where applicable.


For envelope assemblies containing metal framing, the U-factor shall be determined by one of the following methods:


1. Results of laboratory or field measurements.


2. Standard RS-25, listed in Chapter 7, where the metal framing is bonded on one or both sides to a metal skin or covering.


3. The zone method as provided in Chapter 24 of Standard RS-1, listed in Chapter 7.


4. Results of parallel path correction factors effective framing/cavity R-values as provided in Table 10-5A - EFFECTIVE R-VALUES FOR METAL FRAMING AND CAVITY ONLY for metal stud walls and roof/ceilings.


502.1.2: For consideration of thermal mass effects, see section 402.4.


502.1.3: When return air ceiling plenums are employed, the roof/ceiling assembly shall:


a. For thermal transmittance purposes, not include the ceiling proper nor the plenum space as part of the assembly; and


b. For gross area purposes, be based upon the interior face of the upper plenum surface.


502.1.4 Insulation:


502.1.4.1 General: All insulating materials shall comply with sections 2602 and/or 707 of the Uniform Building Code. Substantial contact of the insulation with the surface being insulated is required. All insulation materials shall be installed according to the manufacturer's instructions to achieve proper densities and maintain uniform R-values and shall be installed in a manner which will permit inspection of the manufacturer's R-value identification mark. To the maximum extent possible, insulation shall extend over the full component area to the intended R-value.


Alternatively, the thickness of roof/ceiling and wall insulation that is either blown in or spray-applied shall be identified by inches of thickness, density and R-value markers installed at least one for every 300 square feet (28 m2) through the attic, ceiling and/or wall space. In attics, the markers shall be affixed to the trusses or joists and marked with the minimum initial installed thickness and minimum settled thickness with numbers a minimum 1.0 inch (25 mm) in height. Each marker shall face the attic access. The thickness of installed attic insulation shall meet or exceed the minimum initial installed thickness shown by the marker. In cathedral ceilings and walls, the markers shall be affixed to the rafter and wall frame at alternating high and low intervals and marked with the minimum installed density and R-value with numbers a minimum 1.0 inch (25 mm) in height. Each marker shall face the conditioned room area.


502.1.4.2 Insulation Materials: All insulation materials including facings such as vapor barriers or breather papers installed within floor/ceiling assemblies, roof/ceiling assemblies, walls, crawl spaces, or attics shall have a flame spread rating of less than 25 and a smoke density not to exceed 450 when tested in accordance with UBC Standard 8-1.


EXCEPTIONS: 1. Foam plastic insulation shall comply with section 2602 of the Uniform Building Code.
2. When such materials are installed in concealed spaces of Types III, IV and V construction, the flame spread and smoke developed limitations do not apply to facing, provided that the facing is installed in substantial contact with the unexposed surface of the ceiling, floor or wall finish.
3. Cellulose insulation shall comply with section 707 of the Uniform Building Code.

502.1.4.3 Clearances: Where required, insulation shall be installed with clearances according to manufacturer's specifications. Insulation shall be installed so that required ventilation is unobstructed. For blown or poured loose fill insulation, clearances shall be maintained through installation of a permanent retainer.


502.1.4.4 Access Hatches and Doors: Access doors from conditioned spaces to unconditioned spaces (e.g., attics and crawl spaces) shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces. Access shall be provided to all equipment which prevents damaging or compressing the insulation. A wood framed or equivalent baffle or retainer must be provided when loose fill insulation is installed, the purpose of which is to prevent the loose fill insulation from spilling into the living space when the attic access is opened, and to provide a permanent means of maintaining the installed R-value of the loose fill insulation.


502.1.4.5 Roof/Ceiling Insulation: Open-blown or poured loose fill insulation may be used in attic spaces where the slope of the ceiling is not more than 3 feet in 12 and there is at least 30 inches of clear distance from the top of the bottom chord of the truss or ceiling joist to the underside of the sheathing at the roof ridge. When eave vents are installed, baffling of the vent openings shall be provided so as to deflect the incoming air above the surface of the insulation. Baffles shall be, rigid material, resistant to wind driven moisture. Requirements for baffles for ceiling insulation shall meet the Uniform Building Code section 1505.3 for minimum ventilation requirements. When feasible, the baffles shall be installed from the top of the outside of the exterior wall, extending inward, to a point 6 inches vertically above the height of noncompressed insulation, and 12 inches vertically above loose fill insulation.


502.1.4.6 Wall Insulation: Insulation installed in exterior walls shall comply with the provisions of this section. All wall insulation shall fill the entire framed cavity. Exterior wall cavities isolated during framing shall be fully insulated to the levels of the surrounding walls. All faced insulation shall be face stapled to avoid compression.


502.1.4.7 Floor Insulation: Floor insulation shall be installed in a permanent manner in substantial contact with the surface being insulated. Insulation supports shall be installed so spacing is no more than 24 inches on center. Foundation vents shall be placed so that the top of the vent is below the lower surface of the floor insulation.


EXCEPTION: Insulation may be omitted from floor areas over heated basements, heated garages or underfloor areas used as HVAC supply plenums. See Uniform Mechanical Code section 607 for underfloor supply plenum requirements. When foundation walls are insulated, the insulation shall be attached in a permanent manner. The insulation shall not block the airflow through foundation vents when installed. When foundation vents are not placed so that the top of the vent is below the lower surface of the floor insulation, a permanently attached baffle shall be installed at an angle of 30 from horizontal, to divert air flow below the lower surface of the floor insulation.

502.1.4.8 Slab-On-Grade: Slab-on-grade insulation, installed inside the foundation wall, shall extend downward from the top of the slab for a minimum distance of 24 inches or downward and then horizontally beneath the slab for a minimum combined distance of 24 inches. Insulation installed outside the foundation shall extend downward to a minimum of 24 inches or to the frostline. Above grade insulation shall be protected.

EXCEPTION: For monolithic slabs, the insulation shall extend downward from the top of the slab to the bottom of the footing.

502.1.4.9 Radiant Slabs: The entire area of a radiant slab shall be thermally isolated from the soil, with a minimum of R-10 insulation. The insulation shall be an approved product for its intended use. If a soil gas control system is present below the radiant slab, which results in increased convective flow below the radiant slab, the radiant slab shall be thermally isolated from the sub-slab gravel layer.


502.1.4.10 Below Grade Walls: Below grade exterior wall insulation used on the exterior (cold) side of the wall shall extend from the top of the below grade wall to the top of the footing and shall be approved for below grade use. Above grade insulation shall be protected.


Insulation used on the interior (warm) side of the wall shall extend from the top of the below grade wall to the below grade floor level.


502.1.5 Glazing and Door U-factors: Glazing and door U-factors shall be determined in accordance with sections 502.1.5.1 and 502.1.5.2. All products shall be labeled with the NFRC certified or default U-factor. The labeled U-factor shall be used in all calculations to determine compliance with this Code. Sealed insulating glass shall conform to, or be in test for, ASTM E-774-81 class A.


EXCEPTIONS: 1. For glazed wall systems, assemblies with all of the following features are deemed to satisfy the vertical glazing U-factor requirement in ((Table 6-1 through 6-6)) Table 6-1 or 6-2 options with vertical glazing U-0.40 and greater:
a. Double glazing with a minimum 1/2 inch gap width, having a low-emissivity coating with e=0.10 maximum, with 90% minimum argon gas fill, and a non-aluminum spacer (as defined in footnote 1 to Table 10-6B), and
b. Frame that is thermal break aluminum (as defined in footnote 9 to Table 10-6B), wood, aluminum clad wood, vinyl, aluminum clad vinyl, or reinforced vinyl.
The only labeling requirement for products using this exception shall be a description of the product and a label stating: "This product is deemed to satisfy the ((Table 6-1 through 6-6)) Table 6-1 or 6-2 vertical glazing U-factor requirement using the exception to Section 502.1.5 in the Washington State Energy Code."
2. For overhead glazing, assemblies with all of the following features are deemed to satisfy the overhead glazing U-factor requirement in ((all Table 6-1 through 6-6)) Table 6-1 or 6-2 options except the unlimited glazing area options (((Option VIII in Table 6-2, Option IX in Table 6-4, and Option VIII for Climate Zone 1 and Option IX for Climate Zone 2 in Table 6-6))) (Option III in Table 6-1 and Option IV in Table 6-2):
a. Either, double glazing with a minimum 1/2 inch gap width, having a low-emissivity coating with e=0.20 maximum, with 90% minimum argon gas fill, or, triple glazed plastic domes, and
b. Frame that is thermal break aluminum (as defined in footnote 9 to Table 10-6B), wood, aluminum clad wood, vinyl, aluminum clad vinyl, or reinforced vinyl.
The only labeling requirement for products using this exception shall be a description of the product and a label stating: "This product is deemed to satisfy the ((Table 6-1 through 6-6)) Table 6-1 or 6-2 overhead glazing U-factor requirement using the exception to Section 502.1.5 in the Washington State Energy Code."
3. For solariums with a floor area which does not exceed 300 square feet, assemblies which comply with the features listed in exception 2 are deemed to satisfy the vertical glazing and overhead glazing U-factor requirement in ((Table 6-1 through 6-6)) Table 6-1 or 6-2 options with vertical glazing U-0.40 and greater.
The only labeling requirement for products using this exception shall be a description of the product and a label stating: "This product is deemed to satisfy the ((Table 6-1 through 6-6)) Table 6-1 or 6-2 vertical glazing and overhead glazing U-factor requirements using the exception to Section 502.1.5 in the Washington State Energy Code."

502.1.5.1 Standard Procedure for Determination of Glazing U-factors: U-factors for glazing shall be determined, certified and labeled in accordance with the National Fenestration Rating Council (NFRC) Product Certification Program (PCP), as authorized by an independent certification and inspection agency licensed by the NFRC. Compliance shall be based on the Residential Model Size. Product samples used for U-factor determinations shall be production line units or representative of units as purchased by the consumer or contractor. Products that are listed in the NFRC Certified Products Directory or certified to the NFRC standard shall not use default values.

EXCEPTIONS: 1. Glazing products without NFRC ratings may be assigned default U-factors from Table 10-6A for vertical glazing and from Table 10-6E for overhead glazing.
2. Units without NFRC ratings produced by a small business may be assigned default U-factors from Table 10-6A for garden windows, from Table 10-6B for other vertical glazing, and from Table 10-6E for overhead glazing.

502.1.5.2 Standard Procedure for Determination of Door U-factors: All doors, including fire doors, shall be assigned default U-factors from Table 10-6C.


EXCEPTIONS: 1. U-factors determined, certified and labeled in accordance with the National Fenestration Rating Council (NFRC) Product Certification Program (PCP), as authorized by an independent certification and inspection agency licensed by the NFRC.
2. The default values for the opaque portions of doors shall be those listed in Table 10-6C, provided that the U-factor listed for a door with a thermal break shall only be allowed if both the door and the frame have a thermal break.
3. One unlabeled or untested exterior swinging door with the maximum area of 24 square feet may be installed for ornamental, security or architectural purposes. Products using this exception shall not be included in ((either)) the U-factor ((or glazing area)) calculation requirements, however glazing area shall be included in glazing area calculations.

502.1.6 Moisture Control:


502.1.6.1 Vapor Retarders: Vapor retarders shall be installed on the warm side (in winter) of insulation as specified in the following cases.

EXCEPTION: Vapor retarder installed with not more than 1/3 of the nominal R-value between it and the conditioned space.

502.1.6.2 Floors: Floors separating conditioned space from unconditioned space shall have a vapor retarder installed. The vapor retarder shall have a one perm dry cup rating or less (i.e., four mil [0.004 inch thick] polyethylene or kraft faced material).


502.1.6.3 Roof/Ceilings: Roof/ceiling assemblies where the ventilation space above the insulation is less than an average of 12 inches shall be provided with a vapor retarder. Faced batt insulation where used as a vapor retarder shall be face stapled. Single rafter joist vaulted ceiling cavities shall be of sufficient depth to allow a minimum one inch vented air space above the insulation.


502.1.6.4: Vapor retarders shall not be required in roof/ceiling assemblies where the ventilation space above the insulation averages 12 inches or greater.


502.1.6.5: Vapor retarders shall not be required where all of the insulation is installed between the roof membrane and the structural roof deck.


502.1.6.6 Walls: Walls separating conditioned space from unconditioned space shall have a vapor retarder installed. Faced batt insulation shall be face stapled.


502.1.6.7 Ground Cover: A ground cover of six mil (0.006 inch thick) black polyethylene or approved equal shall be laid over the ground within crawl spaces. The ground cover shall be overlapped 12 inches minimum at the joints and shall extend to the foundation wall.

EXCEPTION: The ground cover may be omitted in crawl spaces if the crawl space has a concrete slab floor with a minimum thickness of 3-1/2 inches.

502.2 Thermal Criteria for Group R Occupancy:


502.2.1 UA Calculations: The proposed UA as calculated using Equations 2 and 3 shall not exceed the target UA as calculated using Equation 1. For the purpose of determining equivalent thermal performance, the glazing area for the target UA shall be calculated using values in Table 5-1. The opaque door area shall be the same in the target UA and the proposed UA.

EXCEPTION: Log and solid timber walls that have a minimum average thickness of 3.5" and with space heat type other than electric resistance, are exempt from wall target UA and proposed UA calculations.

502.2.2 Space Heat Type: The following two categories comprise all space heating types:


1. Electric Resistance: Space heating systems which include baseboard units, radiant units and forced air units as either the primary or secondary heating system.

EXCEPTION: Electric resistance systems for which the total electric heat capacity in each individual dwelling unit does not exceed the greater of: 1) One thousand watts (1000 w) per dwelling unit, or; 2) One watt per square foot (1 w/ft2) of the gross floor area.

2. Other: All gas, wood, oil and propane space heating systems, unless electric resistance is used as a secondary heating system, and all heat pump space heating systems. (See EXCEPTIONS, Electric Resistance, section 502.2.2 above.)


502.3 Reserved.


502.4 Air Leakage:


502.4.1 General: The requirements of this section shall apply to all buildings and structures, or portions thereof, and only to those locations separating outdoor ambient conditions from interior spaces that are heated or mechanically cooled.


502.4.2 Doors and Windows, General: Exterior doors and windows shall be designed to limit air leakage into or from the building envelope. Site-constructed doors and windows shall be sealed in accordance with Section 502.4.3.


502.4.3 Seals and Weatherstripping:


a. Exterior joints around windows and door frames, openings between walls and foundation, between walls and roof and wall panels; openings at penetrations of utility services through walls, floors and roofs; and all other openings in the building envelope for all occupancies and all other openings in between units in R-1 occupancy shall be sealed, caulked, gasketed or weatherstripped to limit air leakage. Other exterior joints and seams shall be similarly treated, or taped, or covered with moisture vapor permeable housewrap.


b. All exterior doors or doors serving as access to an enclosed unheated area shall be weatherstripped to limit leakage around their perimeter when in a closed position.


c. Site built windows are exempt from testing but shall be made tight fitting. Fixed lights shall have glass retained by stops with sealant or caulking all around. Operating sash shall have weatherstripping working against overlapping trim and a closer/latch which will hold the sash closed. The window frame to framing crack shall be made tight with caulking, overlapping membrane or other approved technique.


d. Openings that are required to be fire resistive are exempt from this section.


502.4.4 Recessed Lighting Fixtures: When installed in the building envelope, recessed lighting fixtures shall meet one of the following requirements:


1. Type IC rated, manufactured with no penetrations between the inside of the recessed fixture and ceiling cavity and sealed or gasketed to prevent air leakage into the unconditioned space.


2. Type IC rated, installed inside a sealed box constructed from a minimum 1/2 inch thick gypsum wall board, or constructed from a preformed polymeric vapor barrier, or other air tight assembly manufactured for this purpose.


3. Type IC rated, certified under ASTM E283 to have no more than 2.0 cfm air movement from the conditioned space to the ceiling cavity. The lighting fixture shall be tested at 75 Pascals or 1.57 lbs/ft2 pressure difference and have a label attached, showing compliance.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0502, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0502, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0502, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0502, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0502, filed 12/19/91, effective 7/1/92. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-0502, filed 12/19/90, effective 7/1/91.]

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 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0503   Building mechanical systems.  

503.1 General: This section covers the determination of design requirements, system and component performance, control requirements, insulating systems and duct construction.


503.2 Calculations of Heating and Cooling Loads, and System Sizing Limits: The design parameters specified in Chapter 3 shall apply for all computations.


503.2.1 Calculation Procedures: Heating and cooling design loads for the purpose of sizing HVAC systems are required and shall be calculated in accordance with accepted engineering practice, including infiltration and ventilation.


503.2.2 Space Heating and Space Cooling System Sizing Limits: Building mechanical systems for all buildings which provide space heating and/or space cooling shall be sized no greater than two hundred percent (200%) of the heating and cooling design loads as calculated above.


EXCEPTIONS: The following limited exemptions from the sizing limit shall be allowed; however, in all cases heating and/or cooling design load calculations shall be submitted.
1. For equipment which provides both heating and cooling in one package unit, including heat pumps with electric heating and cooling and gas-pack units with gas heating and electric cooling, compliance need only be demonstrated for either the space heating or space cooling system size.
2. Natural gas- or oil-fired space heating equipment whose total rated space heating output in any one dwelling unit is
a. 40,000 Btu/h or less is exempt from the sizing limit,
b. larger than 40,000 Btu/h may exceed the two hundred (200%) percent sizing limit provided that the installed equipment has an annual fuel utilization efficiency (AFUE) of not less than ninety (90%) percent.
3. Stand-by equipment may be installed if controls and other devices are provided which allow redundant equipment to operate only when the primary equipment is not operating.

503.3 Simultaneous Heating and Cooling: Systems and equipment that provide simultaneous heating and cooling shall comply with the requirements in, as appropriate, Section 1422 or Section 1435.


503.4 HVAC Equipment Performance Requirements: All heating equipment shall meet the requirements of the 1987 National Appliance Energy Conservation Act (NAECA) and be so labeled. Equipment shall also comply with Section 1411.


((503.4.1 Equipment Components:


503.4.1.1: The requirements of this section apply to equipment and mechanical component performance for heating, ventilating and air-conditioning systems. Equipment efficiency levels are specified. Data furnished by the equipment supplier or certified under a nationally recognized certification program or rating procedure shall be used to satisfy these requirements. Equipment efficiencies shall be based on the standard rating conditions in Tables 5-4, 5-5 or 5-6 as appropriate.


503.4.1.2: Where components from more than one manufacturer are assembled into systems regulated under this section, compliance for each component shall be as specified in sections 503.4.2 through 503.4.6 of this Code.


503.4.2: HVAC System Heating Equipment Heat Pump-heating Mode. Heat pumps whose energy input is entirely electric shall have a coefficient of performance (COP) heating, not less than the values in Table 5-7. Heat Pumps with supplementary backup heat other than electricity shall meet the requirements of Table 5-7.


503.4.2.1: These requirements apply to, but are not limited to, unitary (central) heat pumps (air source and water source) in the heating mode, water source (hydronic) heat pumps as used in multiple-unit hydronic HVAC systems, and heat pumps in the packaged terminal air-conditioner in the heating mode.


503.4.2.3 Supplementary Heater: The heat pump shall be installed with a control to prevent supplementary backup heater operation when the operating load can be met by the heat pump compression cycle alone.


503.4.2.4 Heat Pump Controls: Requirements for heat pump controls are listed in section 503.8.3.5 of this Code.


503.4.3 HVAC System Combustion Equipment: For Group R Occupancy, all gas, oil, and propane central heating systems shall have a minimum AFUE of 0.78*. All other Group R Occupancy heating equipment fueled by gas, oil, or propane shall be equipped with an intermittent ignition device, or shall comply with the efficiencies as required in the 1987 National Appliances Energy Conservation Act (Public Law 100-12).


*HVAC Heating system efficiency trade-offs shall be made using Chapters 4 or 6 of this Code.


503.4.4 Packaged and Unitary HVAC System Equipment, Electrically Operated, Cooling Mode: HVAC system equipment as listed below, whose energy input in the cooling mode is entirely electric, shall have an energy efficiency ratio (EER) or a seasonal energy efficiency ratio (SEER) cooling not less than values in Table 5-8.


503.4.4.1: These requirements apply to, but are not limited to, unitary (central) and packaged terminal heat pumps (air source and water source); packaged terminal air conditioners.


503.4.5 Other HVAC Equipment: HVAC equipment, other than that addressed in Sections 503.4.2 through 503.4.4, shall have a minimum performance at the specified rating conditions not less than the values shown in Tables 14-1 through 14-3.
))


503.5 Reserved.


503.6 Balancing: The HVAC system design shall provide a means for balancing air and water systems. Balancing the system shall include, but not be limited to, dampers, temperature and pressure test connections and balancing valves.


503.7 Cooling with Outdoor Air (Economizer Cycle): Systems and equipment that provide mechanical cooling shall comply with Section 1413 and, as appropriate, Section 1423 or 1433.


503.8 Controls:


503.8.1 Temperature Control: Each system shall be provided with at least one adjustable thermostat for the regulation of temperature. Each thermostat shall be capable of being set by adjustment or selection of sensors as follows:


503.8.1.1: When used to control heating only: Fifty-five degrees to seventy-five degrees F.


503.8.1.2: When used to control cooling only: Seventy degrees to eighty-five degrees F.


503.8.1.3: When used to control both heating and cooling, it shall be capable of being set from fifty-five degrees to eighty-five degrees F and shall be capable of operating the system heating and cooling in sequence. The thermostat and/or control system shall have an adjustable deadband of not less than ten degrees F.


503.8.2 Humidity Control: If a system is equipped with a means for adding moisture to maintain specific selected relative humidities in space or zones, a humidistat shall be provided. Humidistats shall be capable of being set to prevent new energy from being used to produce space-relative humidity above thirty percent.


EXCEPTION: Special uses requiring different relative humidities may be permitted when approved by the building official.

503.8.3 Zoning for Temperature Control:


503.8.3.1 One- and Two-Family Dwellings: At least one thermostat for regulation of space temperature shall be provided for each separate system. In addition, a readily accessible manual or automatic means shall be provided to partially restrict or shut off the heating and/or cooling input to each zone or floor.


503.8.3.2 Multifamily Dwellings: For multifamily dwellings, each individual dwelling unit shall have at least one thermostat for regulation of space temperature. A readily accessible manual or automatic means shall be provided to partially restrict or shut off the heating and/or cooling input to each room. Spaces other than living units shall meet the requirements of 503.8.3.3.


503.8.3.3 Reserved.


503.8.3.4 Control Setback and Shut-off:


Residential Occupancy Groups. One- and Two-Family and Multifamily dwellings -- The thermostat required in section 503.8.3.1 or section 503.8.3.2, or an alternate means such as a switch or clock, shall provide a readily accessible, manual or automatic means for reducing the energy required for heating and cooling during the periods of non-use or reduced need, such as, but not limited to unoccupied periods and sleeping hours. Lowering thermostat set points to reduce energy consumption of heating systems shall not cause energy to be expended to reach the reduced setting.


503.8.3.5 Heat Pump Controls: Programmable thermostats are required for all heat pump systems. The cut-on temperature for the compression heating shall be higher than the cut-on temperature for the supplementary heat, and the cut-off temperature for the compression heating shall be higher than the cut-off temperature for the supplementary heat. Heat pump thermostats will be capable of providing at least two programmable setback periods per day. The automatic setback thermostat shall have the capability of limiting the use of supplemental heat during the warm-up period.


503.9 Air Handling Duct System Insulation: Ducts, plenums and enclosures installed in or on buildings shall be thermally insulated per Table 5-11.


EXCEPTIONS: Duct insulation (except where required to prevent condensation) is not required in any of the following cases:
1. When the heat gain or loss of the ducts, without insulation, will not increase the energy requirements of the building.
2. Within the HVAC equipment.
3. Exhaust air ducts.
4. Supply or return air ducts installed in unvented crawl spaces with insulated walls, basements, or cellars in one-and two-family dwellings.

503.10 Duct Construction: All duct work shall be constructed in accordance with Standards RS-15, RS-16, RS-17, RS-18, RS-19 or RS-20, as applicable, and the Uniform Mechanical Code.


503.10.1 Leakage Testing: High-pressure and medium-pressure ducts shall be leak tested in accordance with the applicable standards in Chapter 7 of this Code with the rate of air leakage not to exceed the maximum rate specified in that standard.


503.10.2 Seams and Joints: All low-pressure supply and return, including enclosed stud bays or joist cavities/space used to transport air, shall be securely fastened and sealed with welds, gaskets, mastics (adhesives), mastic-plus-embedded-fabric systems or tapes installed in accordance with the manufacturer's installation instructions. Tapes and mastics used with rigid fibrous glass ducts shall be listed and labeled in accordance with UL 181A. Tapes and mastics used with flexible air ducts shall be listed and labeled in accordance with UL 181B. Duct tape is not permitted as a sealant on any ducts.


EXCEPTION: Ducts or building cavities used for air distribution that are located entirely within the conditioned space of the building are exempt from this section.

503.10.3 Dampers: Requirements for Automatic or manual dampers are found in the Washington State Ventilation and Indoor Air Quality Code.


503.10.4 Duct Insulation: Ducts shall meet the insulation requirements specified in Table 5-11.


503.11 Pipe Insulation: All piping shall be thermally insulated in accordance with Table 5-12.


EXCEPTION: Piping installed within unitary HVAC equipment.

Cold water pipes outside the conditioned space shall be insulated in accordance with the Washington State Plumbing Code (chapter 51-46 WAC).

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0503, filed 1/5/01, effective 7/1/01. Statutory Authority: RCW 19.27A.020, 19.27A.045, and 19.27.020. 98-24-075, 51-11-0503, filed 12/1/98, effective 7/1/99. Statutory Authority: RCW 19.27A.025 and 19.27A.045. 98-03-003, 51-11-0503, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-0503, filed 10/18/93, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0503, filed 12/19/91, effective 7/1/92. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-0503, filed 12/19/90, effective 7/1/91.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0530   Table 5-1.  

TABLE 5-1

TARGET COMPONENT VALUES FOR GROUP R OCCUPANCY

((Electric Resistance)) ((Other Fuels
Climate Zone Climate Zone
Component 1 2 1 2
Glazing % Floor Area 15% 15% 15% 15%
Vertical Glazing U-Factor U = 0.400 U = 0.400 U = 0.650 U = 0.600
Overhead Glazing U-Factor U = 0. 58 U = 0. 58 U = 0. 68 U = 0.64
Doors U = 0.200

(R-5)

U = 0.200

(R-5)

U = 0.400

(R-2.5)

U = 0.400

(R-2.5)

Ceilings

Attic

Single Rafter/

Joist Vaulted

U = 0.031

(R-38)

U = 0.034

(R-30)

U = 0.031

(R-38)

U = 0.034

(R-30)

U = 0.036

(R-30)

U = 0.034

(R-30)

U = 0.031

(R-38)

U = 0.034

(R-30)

Walls2 U = 0.058

(R-19A)

U = 0.044

(R-19+5A)

U = 0.0621

(R-19)

U = 0.0621

(R-19)

Floors U = 0.029

(R-30)

U = 0.029

(R-30)

U = 0.041

(R-19)

U = 0.029

(R-30)

Slab on Grade

Slab R-Value

F = 0.54

(R-10)

F = 0.54

(R-10)

F = 0.54

(R-10)

F = 0.54

(R-10)

Below Grade Interior
Wall R-Value R-19 R-19 R-19 R-19
2' Depth: Walls

Slab

U = 0.043

F = 0.69

U = 0.043

F = 0.69

U = 0.043

F = 0.69

U = 0.043

F = 0.69

3.5' Depth: Walls

Slab

U = 0.041

F = 0.64

U = 0.041

F = 0.64

U = 0.041

F = 0.64

U = 0.041

F = 0.64

7' Depth: Walls

Slab

U = 0.037

F = 0.57

U = 0.037

F = 0.57

U = 0.037

F = 0.57

U = 0.037

F = 0.57

Below Grade Exterior
Wall R-Value R-10 R-12 R-10 R-12
2' Depth: Walls

Slab

U = 0.070

F = 0.60

U = 0.061

F = 0.60

U = 0.070

F = 0.60

U = 0.061

F = 0.60

3.5' Depth: Walls

Slab

U = 0.064

F = 0.57

U = 0.057

F = 0.57

U = 0.064

F = 0.57

U = 0.057

F = 0.57

7' Depth: Walls

Slab

U = 0.056

F = 0.42

U = 0.050

F = 0.42

U = 0.056

F = 0.42

U = 0.050

F = 0.42))


1. Log and Solid Timber walls that have a minimum average thickness of 3.5" are exempt from wall target UA and proposed UA calculations.

2. "A" means advanced framing. For more information, see Section 1005.2.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0530, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0530, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0530, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0530, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 92-01-140, filed 12/19/91, effective 7/1/92)

WAC 51-11-0533   Table 5-4 -- Reserved.  

((HVAC SYSTEM HEATING EQUIPMENT (HEAT PUMPS)

ELECTRICALLY OPERATED STANDARD RATING CONDITIONS



TYPE

CONDITIONS

AIR SOURCE

WATER SOURCE

Air entering equipment

Outdoor unit ambient

Entering water temp.

Water flow rate


F

F

F


70F (dry bulb)

47F (dry bulb)

/43F (wet bulb)

- - - - - - - - - - - -

- - - - - - - - - - - -


70F (dry bulb)

17F (dry bulb)

/15F (wet bulb)

- - - - - - - - - - - -

- - - - - - - - - - - -


70F (dry bulb)

- - - - - - - - - - - -

60F

As used in cooling


((Standard ratings are at sea level.))

[Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0533, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 92-01-140, filed 12/19/91, effective 7/1/92)

WAC 51-11-0534   Table 5-5 -- Reserved.  

((HVAC SYSTEM EQUIPMENT, ELECTRICALLY DRIVEN

STANDARD RATING CONDITIONS--COOLING

TEMPERATURES

DRY BULB

WET BULB

INLET

OUTLET
Air entering equipment

Condenser ambient

(air cooled)

Condenser water

(water cooled)

F

F

F

80

95

----

67

75

----

----

----

85

----

----

95


Standard ratings are at sea level.))

[Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0534, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 92-01-140, filed 12/19/91, effective 7/1/92)

WAC 51-11-0535   Table 5-6 -- Reserved.  

((APPLIED HVAC SYSTEM COMPONENTS ELECTRICALLY DRIVEN

STANDARD RATING CONDITIONS -- COOLING

ITEM CENTRIFUGAL OR SELF-CONTAINED

RECIPROCATING WATER CHILLER

CONDENSERLESS

RECIPROCATING

WATER-CHILLER


((Water Temperature,
F
Leaving chilled 44 44
Entering chilled 54 54
Leaving condenser 95 --
Entering 85 --
Fouling Factor, Water
Nonferrous tubes 0.0005* 0.0005
Steel tubes 0.0010* 0.0010
Refrigerant 0.0000* 0.0000
Condenser Ambient

(air/evap. cooled)

F 95F (dry bulb)

/75F (wet bulb)

--
Compressor saturated

discharge temperature

Water cooled

(evap. cooled)

F -- 105
Air cooled

F -- 120

Standard ratings at sea level.
* hr ft2 F/Btu))

[Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0535, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 92-01-140, filed 12/19/91, effective 7/1/92)

WAC 51-11-0536   Table 5-7 -- Reserved.  

((MINIMUM HEAT PUMP EFFICIENCIES, HEATING MODE1

SOURCE MINIMUM COP MINIMUM HSPF
Air Source:
Split System 3.02 6.8
Single Package System 3.02 6.6
Water Source 3.83 --
Ground Source 3.04 --
1 When tested at the standard rating specified in

Table 5-4.

2 When tested @ 47F (dry bulb)/43F (wet bulb)
3 @ 70F entering
4 @ 50F entering))

[Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0536, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 92-01-140, filed 12/19/91, effective 7/1/92)

WAC 51-11-0537   Table 5-8 -- Reserved.  

((MINIMUM EFFICIENCY FOR ELECTRIC HVAC EQUIPMENT, COOLING

AIR

COOLED

EVAP/

WATER

COOLED

STANDARD

RATING CAPACITY

SEER EER EER

Under 65,000 Btu/hr.

( 19,050 watts )

A. Split System 10.0 -- --
B. Single Package3 9.7 -- 9.31

65,000 Btu/hr. and over
---- 8.92 10.51
1 @ 80F dry bulb / 67F wet bulb
2 @ 95F dry bulb
3 Prior to January 1, 1993 a minimum value of 8.0 SEER may be used.))

[Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0537, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0601   Scope.  


601.1 General: This chapter establishes design criteria in terms of prescribed requirements for building construction.


The provisions of this chapter are applicable to all Group R Occupancies. Occupancies shall comply with all the requirements of Chapter 5 except for the modifications herein specified.


For wood frame assemblies, the building envelope requirements of this chapter may be met by installing one of the prescriptive packages in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2. Installed components shall meet the requirements of section 602. Compliance with nominal R-Values shall be demonstrated for the thermal resistance of the added insulation in framing cavities and/or insulated sheathing only and shall not include the thermal transmittance of other building materials or air films, but shall permit interruption by occasional framing members. Other than wood frame assemblies with continuous insulation uninterrupted by framing shall also be allowed to comply with nominal R-values.


For metal frame assemblies, compliance shall be demonstrated in accordance with Chapter 4 or Chapter 5 based on the assemblies in Chapter 10. Compliance with nominal R-values is not allowed, unless the full nominal R-value of the insulation is installed either inside or outside of the framing and is uninterrupted by framing.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0601, filed 1/5/01, effective 7/1/01. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0601, filed 2/10/94, effective 4/1/94. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-0601, filed 12/19/90, effective 7/1/91.]


AMENDATORY SECTION(Amending WSR 98-03-003, filed 1/8/98, effective 7/1/98)

WAC 51-11-0602   Building envelope requirements for Group R Occupancy.  


602.1 Roof/Ceiling: Ceilings below vented attics and single-rafter, joist-vaulted ceilings shall be insulated to not less than the nominal R-value specified for ceilings in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2 as applicable.


602.2 Exterior Walls Both Above and Below Grade: Above grade exterior walls shall be insulated to not less than the nominal R-value specified in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2 as applicable. The following walls should be considered to meet R-19 without additional documentation:


1. 2 x 6 framed and insulated with R-19 fiberglass batts.


2. 2 x 4 framed and insulated with R-13 fiberglass batts plus R-3.2 foam sheathing.


3. 2 x 4 framed and insulated with R-11 fiberglass batts plus R-5.0 foam sheathing.


602.3 Exterior Walls (Below Grade): Below grade exterior walls surrounding conditioned space shall be insulated to not less than the nominal R-value specified for below grade walls in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2 as applicable.


602.4 Slab-on-grade Floors: Slab-on-grade floors shall be insulated along their perimeter to not less than the nominal R-values specified for slab-on-grade floors in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2 as applicable. Slab insulation shall be installed in compliance with section 502.1.4.8. See Chapter 5, section 502.1.4.9, for additional requirements for radiant slab heating.


602.5 Floors Over Unconditioned Space: Floors over unconditioned spaces, such as vented crawl spaces, unconditioned basements, and parking garages shall be insulated to not less than the nominal R-value shown for floors over unconditioned spaces, in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2.


602.6 Exterior Doors: Doors shall comply with Sections 602.6.1 and 602.6.2.


EXCEPTIONS: 1. Doors whose area and U-factor are included in the calculations for compliance with the requirements for glazing in section 602.7 shall be exempt from the door U-factor requirements prescribed in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2.
2. One unlabeled or untested exterior swinging door with the maximum area of 24 square feet may be installed for ornamental, security or architectural purposes. Products using this exception shall not be included in either the U-factor or glazing area calculation requirements.
602.6.1 Exterior Door Area: For half-lite and full-lite doors, the glazing area shall be included in calculating the allowed total glazing area in Section 602.7.1. Single glazing used for ornamental, security or architectural purposes shall be calculated using the exception to Section 602.7.2.


602.6.2 Exterior Door U-Factor: Doors, including fire doors, shall have a maximum area weighted average U-factor not exceeding that prescribed in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2.


602.7 Glazing:


602.7.1 Glazing Area: The total glazing area as defined in Chapter 2 shall not exceed the percentage of gross conditioned floor area specified in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2. This area shall also include any glazing in doors.


602.7.2 Glazing U-Factor: The total glazing area as defined in Chapter 2 shall have an area weighted average U-factor not to exceed that specified in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2. U-factors for glazing shall be determined in accordance with section 502.1.5. These areas and U-factors shall also include any doors using the exception of section 602.6.


If the U-factors for all vertical and overhead glazing products are below the appropriate U-factor specified, then no calculations are required. If compliance is to be achieved through an area weighted calculation, then the areas and U-factors shall be included in the plans submitted with a building permit application.


EXCEPTION: Single glazing for ornamental, security, or architectural purposes and double glazed garden windows with a wood or vinyl frame shall be exempt from the U-factor calculations but shall have its area ((doubled)) tripled and shall be included in the percentage of the total glazing area as allowed for in ((Tables 6-1 to 6-6)) Table 6-1 or 6-2. The maximum area (before ((doubling)) tripling) allowed for the total of all single glazing and garden windows is one percent of the floor area.

602.8 Air Leakage For Group R Occupancy: The minimum air leakage control measures shall be as specified in section 502.4 as applicable.

[Statutory Authority: RCW 19.27A.025 and 19.27A.045. 98-03-003, 51-11-0602, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0602, filed 2/10/94, effective 4/1/94. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-0602, filed 12/19/90, effective 7/1/91.]


AMENDATORY SECTION(Amending WSR 94-05-059, filed 2/10/94, effective 4/1/94)

WAC 51-11-0603   Building mechanical systems for Group R Occupancy.  


603.1: Group R Occupancies that are space heated by air-to-air, ground-to-air, or water-to-air heat pumps shall comply with ((Table 6-2 or 6-4 or 6-6 for other fuels)) Table 6-1 or 6-2. System sizing shall be determined by an analysis consistent with section 503.2 of this Code, or, when approved by the building official, Chapter 9. All mechanical equipment efficiencies and service water heating system efficiencies shall comply with standards as stated in sections 503 and 504 of this Code.

[Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0603, filed 2/10/94, effective 4/1/94. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-0603, filed 12/19/90, effective 7/1/91.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0625   Table 6-1.  

((TABLE 6-1

PRESCRIPTIVE REQUIREMENTS1 **FOR GROUP R OCCUPANCY

CLIMATE ZONE 1 HEATING BY ELECTRIC RESISTANCE

Option Glazing Area10:

% of

Floor

Glazing U-Factor Door 9

U-

Factor

Ceiling2 Vaulted Ceiling3 Wall Above Grade Wall int4 Below Grade Wall ext4 Below Grade Floor5 Slab4

on

Grade

Vertical Overhead11
I. 10% 0.46 0. 58 0.40 R-38 R-30 R-21 R-21 R-10 R-30 R-10
II. 12% 0.43 0. 58 0.20 R-38 R-30 R-19 R-19 R-10 R-30 R-10
III. 12% 0.40 0. 58 0.40 R-38 R-30 R-21 R-21 R-10 R-30 R-10
IV.* 15% 0.40 0. 58 0.20 R-38 R-30 R-19 R-19 R-10 R-30 R-10
V. 18% 0.39 0. 58 0.20 R-38 R-30 R-21 R-21 R-10 R-30 R-10
VI. 21% 0.36 0. 58 0.20 R-38 R-30 R-21 R-21 R-10 R-30 R-10
VII.7 25% 0.327 0. 58 0.20 R-38 R-30 R-19

+R-58

R-21 R-10 R-30 R-10
VIII.7 30% 0.297 0. 58 0.20 R-38 R-30 R-19

+R-58

R-21 R-10 R-30 R-10

* Reference Case
** Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.
1. Minimum requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 19%, it shall comply with all of the requirements of the 21% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2. Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3. Requirement applicable only to single rafter or joist vaulted ceilings.
4. Below grade walls shall be insulated either on the exterior to a minimum level of R-10, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5. Floors over crawl spaces or exposed to ambient air conditions.
6. Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7. The following options shall be applicable to buildings less than three stories: 0.35 maximum for glazing areas of 25% or less; 0.32 maximum for glazing areas of 30% or less.
8. This wall insulation requirement denotes R-19 wall cavity insulation plus R-5 foam sheathing.
9. Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
10. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.040 or less is not included in glazing area limitations.
11. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.))

OPTION 1:

TABLE 6-1

PRESCRIPTIVE REQUIREMENTS0,1 FOR GROUP R OCCUPANCY

CLIMATE ZONE 1

Option Glazing Area10:

% of

Floor

Glazing U-Factor Door9

U-

Factor

Ceiling2 Vaulted Ceiling3 Wall12 Above Grade Wall int4 Below Grade Wall ext4 Below Grade Floor5 Slab6

on

Grade

Vertical Overhead11
I. 12% 0.35 0.58 0.20 R-38 R-30 R-15 R-15 R-10 R-30 R-10
II.* 15% 0.40 0.58 0.20 R-38 R-30 R-21 R-21 R-10 R-30 R-10
III. Unlimited Group R-3 Occupancy only 0.40 0.58 0.20 R-38 R-30 R-21 R-21 R-10 R-30 R-10

* Reference Case

TABLE 6-2

PRESCRIPTIVE REQUIREMENTS0,1 FOR GROUP R OCCUPANCY

CLIMATE ZONE 2

Option Glazing Area10:

% of

Floor

Glazing U-Factor Door9

U-

Factor

Ceiling2 Vaulted Ceiling3 Wall12 Above Grade Wall int4 Below Grade Wall ext4 Below Grade Floor5 Slab6

on

Grade

Vertical Overhead11
I. 10% 0.40 0.58 0.20 R-38 R-30 R-21 Int7 R-21 R-12 R-30 R-10
II.* 15% 0.40 0.58 0.20 R-38 R-30 R-19+R-58 R-21 R-12 R-30 R-10
III. 17% 0.37 0.58 0.20 R-38 R-30 R-19 +R-58 R-21 R-12 R-30 R-10
IV. Unlimited Group R-3 Occupancy only 0.35 0.58 0.20 R-38 R-30 R-21 Int7 R-21 R-12 R-30 R-10

* Reference Case
0. Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.
1. Minimum requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 13%, it shall comply with all of the requirements of the 15% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2. Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3. Requirement applicable only to single rafter or joist vaulted ceilings.
4. Below grade walls shall be insulated either on the exterior to a minimum level of R-10, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5. Floors over crawl spaces or exposed to ambient air conditions.
6. Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7. Int. denotes standard framing 16 inches on center with headers insulated with a minimum of R-5 insulation.
8. This wall insulation requirement denotes R-19 wall cavity insulation plus R-5 foam sheathing.
9. Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
10. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.40 or less is not included in glazing area limitations.
11. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.
12. Log and solid timber walls with a minimum average thickness of 3.5" are exempt from this insulation requirement.

OPTION 2:

TABLE 6-1

PRESCRIPTIVE REQUIREMENTS0,1 FOR GROUP R OCCUPANCY

CLIMATE ZONE 1

Option Glazing Area10:

% of

Floor

Glazing U-Factor Door9

U-

Factor

Ceiling2 Vaulted Ceiling3 Wall12 Above Grade Wall int4 Below Grade Wall ext4 Below Grade Floor5 Slab6

on

Grade

Vertical Overhead11
I. 12% 0.35 0.58 0.20 R-38 R-30 R-13 R-19 R-10 R-30 R-10
II.* 15% 0.40 0.58 0.20 R-38 R-30 R-21 R-21 R-10 R-30 R-10
III. Unlimited

Group R-3 Occupancy only

0.40 0.58 0.20 R-38 R-30 R-21 R-21 R-10 R-30 R-10

* Reference Case

TABLE 6-2

PRESCRIPTIVE REQUIREMENTS0,1 FOR GROUP R OCCUPANCY

CLIMATE ZONE 2

Option Glazing Area10:

% of

Floor

Glazing U-Factor Door9

U-

Factor

Ceiling2 Vaulted Ceiling3 Wall12 Above Grade Wall int4 Below Grade Wall ext4 Below Grade Floor5 Slab6

on

Grade

Vertical Overhead11
I. 10% 0.40 0.58 0.20 R-38 R-30 R-21 Int7 R-21 R-12 R-30 R-10
II.* 15% 0.40 0.58 0.20 R-38 R-30 R-19+R-58 R-21 R-12 R-30 R-10
III. 17% 0.37 0.58 0.20 R-38 R-30 R-19+R-58 R-21 R-12 R-30 R-10
IV. Unlimited Group R-3 Occupancy only 0.35 0.58 0.20 R-38 R-30 R-21 Int7 R-21 R-12 R-30 R-10

* Reference Case
0. Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.
1. Minimum requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 13%, it shall comply with all of the requirements of the 15% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2. Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3. Requirement applicable only to single rafter or joist vaulted ceilings.
4. Below grade walls shall be insulated either on the exterior to a minimum level of R-10, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5. Floors over crawl spaces or exposed to ambient air conditions.
6. Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7. Int. denotes standard framing 16 inches on center with headers insulated with a minimum of R-5 insulation.
8. This wall insulation requirement denotes R-19 wall cavity insulation plus R-5 foam sheathing.
9. Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
10. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.40 or less is not included in glazing area limitations.
11. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.
12. Log and solid timber walls with a minimum average thickness of 3.5" are exempt from this insulation requirement.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0625, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0625, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0625, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0625, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0625, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0626   Table 6-2 -- Reserved.  

((TABLE 6-2

PRESCRIPTIVE REQUIREMENTS1 **FOR GROUP R OCCUPANCY

CLIMATE ZONE 1 HEATING BY OTHER FUELS

Option HVAC9

Equip.

Effic.

Glazing

Area11:

% of

Floor

Glazing U-Factor Door10

U-Factor

Ceiling2 Vaulted

Ceiling3

Wall

Above

Grade

Wall

int4

Below

Grade

Wall

ext4

Below

Grade

Floor5 Slab6

on

Grade

Vertical Overhead12
I. Med. 10% 0.70 0.68 0.40 R-30 R-30 R-15 R-15 R-10 R-19 R-10
II. Med. 12% 0.65 0.68 0.40 R-30 R-30 R-15 R-15 R-10 R-19 R-10
III. High 21% 0.75 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-19 R-10
IV.* Med. 21% 0.65 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-19 R-10
V. Low 21% 0.60 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-19 R-10
VI.7 Med. 25% 0.457 0.68 0.40 R-38 R-30 R-19 R-19 R-10 R-25 R-10
VII.7 Med. 30% 0.407 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-25 R-10
VIII. Med. unlimited 0.25 0.40 0.40 R-30 R-30 R-19 R-19 R-10 R-25 R-10

* Reference Case
** Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.
1 Minium requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 19%, it shall comply with all of the requirements of the 21% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2 Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3 Requirement applicable only to single rafter or joist vaulted ceilings.
4 Below grade walls shall be insulated either on the exterior to a minimum level of R-10, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5 Floors over crawl spaces or exposed to ambient air conditions.
6 Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7 The following options shall be applicable to buildings less than three stories: 0.50 maximum for glazing areas of 25% or less; 0.45 maximum for glazing areas of 30% or less.
8 Reserved.
9 Minimum HVAC Equipment efficiency requirement. 'Low' denotes an AFUE of 0.74. 'Med.' denotes an AFUE of 0.78. 'High' denotes an AFUE of 0.88. Minimum HVAC Equipment efficiency requirement for heat pumps. 'Low' denotes an HSPF of 6.35. 'Med' denotes an HSPF of 6.8. 'High' an HSPF of 7.7. Water and ground source heat pumps shall be considered as medium efficiency and have a minimum COP as required in Table 5-7.
10 Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
11. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U= 0.040 or less is not included in glazing area limitations.
12. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.))

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0626, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0626, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0626, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0626, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0626, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0627   Table 6-3 -- Reserved.  

((TABLE 6-3

PRESCRIPTIVE REQUIREMENTS1 **FOR GROUP R OCCUPANCY

CLIMATE ZONE 2 HEATING BY ELECTRIC RESISTANCE

Option Glazing Area11:

% of Floor

Glazing U-Factor Door10

U-

Factor

Ceiling2 Vaulted

Ceiling3

Wall

Above

Grade

Wall

int4

Below

Grade

Wall

ext4

Below

Grade

Floor5 Slab6

on

Grade

Vertical Over-

head12

I. 10% 0.38 0.58 0.20 R-38 R-30 R-21 R-21 R-12 R-30 R-10
II. 12% 0.40 0.58 0.20 R-38 R-30 R-19+R-58 R-21 R-12 R-25 R-10
III.* 15% 0.40 0.58 0.20 R-38 R-30 R-19+R-58 R-21 R-12 R-30 R-10
IV. 18% 0.38 0.58 0.20 R-38 R-30 R-19+R-58 R-21 R-12 R-30 R-10
V. 21% 0.35 0.58 0.20 R-38Adv R-38 R-19+R-58 R-21 R-12 R-30 R-10
VI.7 25% 0.307 0.58 0.20 R-49Adv R-38 R-19+R-58 R-21 R-12 R-30 R-10
VII.7 30% 0.287 0.58 0.20 R-60Adv R-38 R-21+R-7.59 R-21 R-12 R-30 R-10

* Reference Case
** Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.
1 Minimum requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 19%, it shall comply with all of the requirements of the 21% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2 Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3 Requirement applicable only to single rafter or joist vaulted ceilings.
4 Below grade walls shall be insulated either on the exterior to a minimum level of R-12, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5 Floors over crawl spaces or exposed to ambient air conditions.
6 Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7 The following options shall be applicable to buildings less than three stories: 0.33 maximum for glazing areas of 25% or less; 0.31 maximum for glazing areas of 30% or less.
8 This wall insulation requirement denotes R-19 wall cavity insulation plus R-5 foam sheathing.
9 This wall insulation requirement denotes R-21 wall cavity insulation plus R-7.5 foam sheathing.
10 Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
11. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.040 or less is not included in glazing area limitations.
12. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.))

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0627, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0627, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0627, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0627, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0627, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0628   Table 6-4 -- Reserved.  

((TABLE 6-4

PRESCRIPTIVE REQUIREMENTS1 **FOR GROUP R OCCUPANCY

CLIMATE ZONE 2 HEATING BY OTHER FUELS

Option HVAC9 Equip. Effic. Glazing Area11:

% of

Floor

Glazing U-Factor Door10 U-Factor Ceiling2 Vaulted Ceiling3 Wall Above Grade Wall

int4

Below Grade

Wall

ext4

Below Grade

Floor5 Slab6

on

Grade

Vertical Overhead12
I. Med. 10% 0.70 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-25 R-10
II. Med. 12% 0.65 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-25 R-10
III. High 17% 0.65 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-25 R-10
IV.* Med. 17% 0.60 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
V. Low 17% 0.50 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
VI. Med. 21% 0.50 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
VII.7 Med. 25% 0.407 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
VIII.7 Med. 30% 0.407 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
IX. Med. unlimited 0.25 0.40 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
* Reference Case

** Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.

1 Minimum requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 19%, it shall comply with all of the requirements of the 21% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2 Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3 Requirement applicable only to single rafter or joist vaulted ceilings.
4 Below grade walls shall be insulated either on the exterior to a minimum level of R-12, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5 Floors over crawl spaces or exposed to ambient air conditions.
6 Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7 The following options shall be applicable to buildings less than three stories: 0.45 maximum for glazing areas of 25% or less; 0.40 maximum for glazing areas of 30% or less.
8 Reserved.
9 Minimum HVAC Equipment efficiency requirement. 'Low' denotes an AFUE of 0.74. 'Med.' denotes an AFUE of 0.78. 'High' denotes an AFUE of 0.88. Minimum HVAC Equipment efficiency requirement for heat pumps. 'Low' denotes an HSPF of 6.35. 'Med' denotes an HSPF of 6.8. 'High' an HSPF of 7.7. Water and ground source heat pumps shall be considered as medium efficiency and have a minimum COP as required in Table 5-7.
10 Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
11. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.040 or less is not included in glazing area limitations.
12. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.))

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0628, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0628, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0628, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0628, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0628, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 98-03-003, filed 1/8/98, effective 7/1/98)

WAC 51-11-0629   Table 6-5 -- Reserved.  

((TABLE 6-5

LOG HOMES PRESCRIPTIVE REQUIREMENTS1

HEATING BY ELECTRIC RESISTANCE

Option Average2

Log

Thickness

Glazing Area9:

% of Floor

Glazing U-Factor Door 8

U-Factor

Ceiling3 Vaulted4

Ceiling

Floor5 Slab6

on

Grade

Vertical Overhead10
Climate Zone 1
I.7 5.5" 15% 0.31 0.58 0.14 R-60 Adv R-38 R-38 R-10
II.7 7.5" 15% 0.40 0.58 0.20 R-60 Adv R-38 R-30 R-10
III.* 9.6" 15% 0.40 0.58 0.20 R-38 R-30 R-30 R-10
Climate Zone 2
IV.7 6.7" 15% 0.31 0.58 0.14 R-60 Adv R-38 R-38 R-10
V.7 8.7" 15% 0.40 0.58 0.14 R-60 Adv R-38 R-38 R-10
VI.7 9.8" 15% 0.40 0.58 0.20 R-60 Adv R-38 R-30 R-10
VII.7 10.5" 15% 0.40 0.58 0.20 R-49 Adv R-38 R-30 R-10
VIII.* 13.5" 15% 0.40 0.58 0.20 R-38 R-30 R-30 R-10

* Reference Case
1 For Group R Occupancy use Table 6-5 for only the portion of floor area using log/solid timber walls. Use Tables 6-1 to 6-4 for all other portions of the floor area. Minimum requirements are for each option listed. Interpolations between options is not permitted. Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2 Required minimum average log thickness.
3 'Adv' denotes Advanced Framing. Requirement applies to all ceilings except single rafter joist vaulted ceilings.
4 Requirement applicable only to single rafter joist vaulted ceilings.
5 Floors over crawl spaces or exposed to ambient air conditions.
6 Required slab perimeter insulation shall be water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications.
7 These options shall be applicable to buildings less than three stories.
8 Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C or 10-6D.
9. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.040 or less is not included in glazing area limitations.
10. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.))

[Statutory Authority: RCW 19.27A.025 and 19.27A.045. 98-03-003, 51-11-0629, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0629, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0629, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0629, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-0630   Table 6-6 -- Reserved.  

((TABLE 6-6

LOG HOMES PRESCRIPTIVE REQUIREMENTS1**

HEATING BY OTHER FUELS

Option HVAC9 Equip.

Effic.

Glazing Area12:

% of

Floor

Glazing U-Factor Door 10

U-

Factor

Ceiling2 Vaulted

Ceiling3

Wall11

Above

Grade

Wall

int4

Below

Grade

Wall

ext4

Below

Grade

Floor5 Slab6

on

Grade

Vert-

ical

Over-

head13

Climate Zone 1
I. Med. 10% 0.70 0.68 0.40 R-30 R-30 R-15 R-15 R-10 R-19 R-10
II. Med. 12% 0.65 0.68 0.40 R-30 R-30 R-15 R-15 R-10 R-19 R-10
III. High 21% 0.75 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-19 R-10
IV.* Med. 21% 0.65 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-19 R-10
V. Low 21% 0.60 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-19 R-10
VI.7 Med. 25% 0.457 0.68 0.40 R-38 R-30 R-19 R-19 R-10 R-25 R-10
VII.7 Med. 30% 0.407 0.68 0.40 R-30 R-30 R-19 R-19 R-10 R-25 R-10
VIII. Med. unlimited 0.25 0.40 0.40 R-30 R-30 R-19 R-19 R-10 R-25 R-10
Climate Zone 2
I. Med. 10% 0.70 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-25 R-10
II. Med. 12% 0.65 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-25 R-10
III. High 17% 0.65 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-25 R-10
IV.* Med. 17% 0.60 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
V. Low 17% 0.50 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
VI. Med. 21% 0.50 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
VII. Med. 25% 0.408 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
VIII. Med. 30% 0.408 0.64 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10
IX. Med. unlimited 0.25 0.40 0.40 R-38 R-30 R-19 R-19 R-12 R-30 R-10

* Reference Case
** Nominal R-values are for wood frame assemblies only or assemblies built in accordance with Section 601.1.
1 Minimum requirements for each option listed. For example, if a proposed design has a glazing ratio to the conditioned floor area of 19%, it shall comply with all of the requirements of the 21% glazing option (or higher). Proposed designs which cannot meet the specific requirements of a listed option above may calculate compliance by Chapters 4 or 5 of this Code.
2 Requirement applies to all ceilings except single rafter or joist vaulted ceilings. 'Adv' denotes Advanced Framed Ceiling.
3 Requirement applicable only to single rafter or joist vaulted ceilings.
4 Below grade walls shall be insulated either on the exterior to a minimum level of R-10, or on the interior to the same level as walls above grade. Exterior insulation installed on below grade walls shall be a water resistant material, manufactured for its intended use, and installed according to the manufacturer's specifications. See Section 602.2.
5 Floors over crawl spaces or exposed to ambient air conditions.
6 Required slab perimeter insulation shall be a water resistant material, manufactured for its intended use, and installed according to manufacturer's specifications. See Section 602.4.
7 The following options shall be applicable to buildings less than three stories: 0.50 maximum for glazing areas of 25% or less; 0.45 maximum for glazing areas of 30% or less.
8 The following options shall be applicable to buildings less than three stories: 0.45 maximum for glazing areas of 25% or less; 0.40 maximum for glazing areas of 30% or less.
9 Minimum HVAC Equipment efficiency requirement. 'Low' denotes an AFUE of 0.74. 'Med.' denotes an AFUE of 0.78. 'High' denotes an AFUE of 0.88. Minimum HVAC Equipment efficiency requirement for heat pumps. 'Low' denotes an HSPF of 6.35. 'Med' denotes an HSPF of 6.8. 'High' an HSPF of 7.7. Water and ground source heat pumps shall be considered as medium efficiency and have a minimum COP as required in Table 5-7.
10 Doors, including all fire doors, shall be assigned default U-factors from Table 10-6C.
11 Log and solid timber walls with a minimum average thickness of 3.5" are exempt from this insulation requirement.
12. Where a maximum glazing area is listed, the total glazing area (combined vertical plus overhead) as a percent of gross conditioned floor area shall be less than or equal to that value. Overhead glazing with U-factor of U=0.040 or less is not included in glazing area limitations.
13. Overhead glazing shall have U-factors determined in accordance with NFRC 100 or as specified in Section 502.1.5.))

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-0630, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-0630, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0630, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-0630, filed 2/10/94, effective 4/1/94. Statutory Authority: Chapter 19.27A RCW. 92-01-140, 51-11-0630, filed 12/19/91, effective 7/1/92.]


AMENDATORY SECTION(Amending WSR 95-01-126, filed 12/21/94, effective 6/30/95)

WAC 51-11-0900   Section 0900 -- Prescriptive heating system sizing.   When using the prescriptive approach in Chapter 6, if approved by the building official, design heat load calculations are not required to show compliance to this Code if the heating system installed is equal to or less than the following:

Climate Zone 1 20 Btu/hft2
((Electric Resistance 21 Btu/hft2
Electric Resistance (Forced Air) 24 Btu/hft2
Other Fuels (Forced Air) 27 Btu/hft2))

Climate Zone 2

25 Btu/hft2

((Electric Resistance 29 Btu/hft2
Electric Resistance (Forced Air) 32 Btu/hft2
Other Fuels (Forced Air) 39 Btu/hft2))

Example: A ((1500)) 2000 ft2 house in Zone ((1)) 2, heated with gas, would not have to submit a design heat load if the proposed furnace is ((40,500)) 50,000 Btu or less.


((1500 x 27= 40,500)) 2000 x 25 = 50,000

Disclaimer: All heating systems shall be designed and installed in accordance with Uniform Building Code Section 310.11.

[Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, 51-11-0900, filed 12/21/94, effective 6/30/95. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-0900, filed 12/19/90, effective 7/1/91.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-1006   Section 1006 Default U-factors for glazing and doors.  


1006.1 Glazing and Doors without NFRC Certification: Glazing and doors that do not have NFRC certification shall be assigned the following U-factors:

TABLE 10-6

Other than Group R Occupancy: DEFAULT U-FACTORS FOR VERTICAL GLAZING, OVERHEAD GLAZING AND OPAQUE DOORS

Vertical Glazing
U-Factor
Any Frame Vinyl/Wood

Frame

Single 1.45 1.45
Double 0.90 0.75
1/2 Inch Air, Fixed 0.75 0.60
1/2 Inch Air,

Low-e(0.40), Fixed

0.60 0.50
1/2 Inch Argon,

Low-e(0.10), Fixed

0.50 0.40

Overhead Glazing
U-Factor
Any Frame Vinyl/Wood

Frame

Single 2.15 2.15
Double 1.45 1.00
Low-e(0.40) or Argon 1.40 0.95
Low-e(0.40)+ Argon 1.30 0.85
Low-e(0.20) Air 1.30 0.90
Low-e(0.20)+ Argon 1.25 0.80
Triple 1.25 0.80

Opaque Doors
U-Factor
Uninsulated Metal 1.20
Insulated Metal (Including Fire Door and Smoke Vent) 0.60
Wood 0.50

Notes:


Where a gap width is listed (i.e.: 1/2 inch), that is the minimum allowed.

Where a low-emissivity emittance is listed (i.e.: 0.40, 0.20, 0.10), that is the maximum allowed.

Where a gas other than air is listed (i.e.: Argon), the gas fill shall be a minimum of 90%.

Where an operator type is listed (i.e.: Fixed), the default is only allowed for that operator type.

Where a frame type is listed (i.e.: Wood/vinyl), the default is only allowed for that frame type. Wood/vinyl frame includes reinforced vinyl and aluminum-clad wood.


TABLE 10-6A

Group R Occupancy: DEFAULT U-FACTORS FOR VERTICAL GLAZING

Description1,2,3,4 Frame Type5,6
Aluminum Aluminum

Thermal Break7

Wood/Vinyl
Windows Single 1.20 1.20 1.20
Double, < 1/2" Clear 0.92 0.75 0.63
Clear+ Argon 0.87 0.71 0.60
Low-e 0.85 0.69 0.58
Low-e+Argon 0.79 0.62 0.53
Double, > 1/2" Clear 0.86 0.69 0.58
Clear+ Argon 0.83 0.67 0.55
Low-e 0.78 0.61 0.51
Low-e+Argon 0.75 0.58 0.48
Triple, Clear 0.70 0.53 0.43
Clear+ Argon 0.69 0.52 0.41
Low-e 0.67 0.49 0.40
Low-e+Argon 0.63 0.47 0.37
Garden Single 2.60 n.a. 2.31
Windows Double Clear 1.81 n.a. 1.61
Clear+ Argon 1.76 n.a. 1.56
Low-e 1.73 n.a. 1.54
Low-e+Argon 1.64 n.a. 1.47

1 <1/2"= a minimum dead air space of less than 0.5 inches between the panes of glass.
> 1/2"= a minimum dead air space of 0.5 inches or greater between the panes of glass.
Where no gap width is listed, the minimum gap width is 1/4".
2 Any low-e (emissivity) coating (0.1, 0.2 or 0.4).
3 U-factors listed for argon shall consist of sealed, gas-filled insulated units for argon, C02, SF6, argon/SF6 mixtures and Krypton.
4 "Glass block” assemblies may use a U-factor of 0.51.
5 Insulated fiberglass framed products shall use wood/vinyl U-factors.
6 Aluminum clad wood windows shall use the U-factors listed for wood/vinyl windows.
7 Aluminum Thermal Break= An aluminum thermal break framed window shall incorporate the following minimum design characteristics:
a) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/F;
b) The thermal break material must produces a gap in the frame material of not less than 0.210 inches; and,
c) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in a) and b) above.

TABLE 10-6B1

Group R Occupancy: ((DEFAULT U-FACTORS)) SMALL BUSINESS COMPLIANCE TABLE FOR VERTICAL GLAZING

((FOR SMALL BUSINESSES))

FRAME TYPE7,8
DESCRIPTION2,3,4,((5,))6 ALUMINUM ALUM.

THERMAL

BREAK9

WOOD/VINYL ALUM. CLAD

WOOD/REINFORCED

VINYL10

Double, Clear 1/4" 0.82 0.66 0.56 0.59
Double, Clear 1/4"+ argon 0.77 0.63 0.53 0.56
Double, Low-e4 1/4" 0.76 0.61 0.52 0.54
Double, Low-e2 1/4" 0.73 0.58 0.49 0.51
Double, Low-e1 1/4" 0.70 0.55 0.47 0.49
Double, Low-e4 1/4"+ argon 0.70 0.55 0.47 0.49
Double, Low-e2 1/4"+ argon 0.66 0.52 0.43 0.46
Double, Low-e1 1/4"+ argon 0.64 0.50 0.41 0.43
Double, Clear 3/8" 0.78 0.63 0.54 0.57
Double, Clear 3/8"+ argon 0.75 0.60 0.51 0.54
Double, Low-e4 3/8" 0.72 0.57 0.48 0.51
Double, Low-e2 3/8" 0.69 0.54 0.45 0.48
Double, Low-e1 3/8" 0.66 0.51 0.43 0.46
Double, Low-e4 3/8"+ argon 0.68 0.53 0.44 0.47
Double, Low-e2 3/8"+ argon 0.63 0.49 0.41 0.44
Double, Low-e1 3/8"+ argon 0.61 0.47 0.39 0.41
Double, Clear 1/2" 0.75 0.60 0.50 0.54
Double, Clear 1/2"+ argon 0.72 0.58 0.48 0.51
Double, Low-e4 1/2" 0.68 0.53 0.44 0.47
Double, Low-e2 1/2" 0.64 0.50 ((0.41)) 0.40 0.44
Double, Low-e1 1/2" 0.61 0.47 ((0.39)) 0.35 0.42
Double, Low-e4 1/2"+ argon 0.65 0.50 0.42 0.44
Double, Low-e2 1/2"+ argon 0.60 0.46 0.37 0.40
Double, Low-e1 1/2"+ argon 0.58 0.43 0.35 0.38
Triple, Clear 1/4" 0.66 0.52 0.42 0.44
Triple, Clear 1/4"+ argon 0.63 0.49 0.39 0.42
Triple, Low-e4 1/4" 0.64 0.50 0.40 0.40
Triple, Low-e2 1/4" 0.62 0.48 0.39 0.41
Triple, Low-e1 1/4" 0.61 0.47 0.38 0.40
Triple, Low-e4 1/4"+ argon 0.60 0.46 0.37 0.39
Triple, Low-e2 1/4"+ argon 0.58 0.43 0.34 0.37
Triple, Low-el 1/4" + argon 0.57 0.42 0.34 0.36
Triple, Clear 1/2" 0.61 0.46 0.37 0.40
Triple, Clear 1/2"+ argon 0.59 0.45 0.36 0.38
Triple, Low-e4 1/2" 0.58 0.43 0.35 0.37
Triple, Low-e2 1/2" 0.55 0.41 0.32 0.35
Triple, Low-e1 1/2" 0.54 0.39 0.31 0.33
Triple, Low-e4 1/2"+ argon 0.55 0.41 0.32 0.35
Triple, Low-e2 1/2"+ argon 0.52 0.38 0.30 0.32
Triple, Low-e1 1/2"+ argon 0.51 0.37 0.29 0.31

Footnotes to Table 10-6B

1 Subtract 0.02 from the listed default U-factor for non-aluminum spacer. Acceptable spacer materials may include but is not limited to fiberglass, wood and butyl or other material with an equivalent thermal performance.
2 1/4"= a minimum dead air space of 0.25 inches between the panes of glass.

3/8"= a minimum dead air space of 0.375 inches between the panes of glass.

1/2"= a minimum dead air space of 0.5 inches between the panes of glass.

Product with air spaces different than those listed above shall use the value for the next smaller air space; i.e. 3/4 inch= 1/2 inch U-factors, 7/16 inch= 3/8 inch U-factors, 5/16 inch= 1/4 inch U-factors.

3 Low-e4 (emissivity) shall be 0.4 or less.

Low-e2 (emissivity) shall be 0.2 or less.

Low-e1 (emissivity) shall be 0.1 or less.

4 U-factors listed for argon shall consist of sealed, gas-filled insulated units for argon, CO2, SF6, and argon/SF6 mixtures. The following conversion factor shall apply to Krypton gas-filled units: 1/4" or greater with krypton is equivalent to 1/2" argon.
5 ((Dividers placed between glazing: The U-factor listed shall be used where the divider has a minimum gap of 1/8 inch between the divider and lite of each inside glass surface. Add 0.03 to the listed U-factor for True Divided Lite windows.)) Reserved.
6 "Glass block” assemblies may use a U-factor of 0.51.
7 Insulated fiberglass framed products shall use wood/vinyl U-factors.
8 Subtract 0.02 from the listed default values for solariums.
9 Aluminum Thermal Break= An aluminum thermal break framed window shall incorporate the following minimum design characteristics:
a) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/F;
b) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and,
c) All metal framing members of the products exposed to interior and exterior air shall incorporate a

thermal break meeting the criteria in a) and b) above.

10 Aluminum clad wood windows shall use the U-factors listed for Aluminum Clad Wood/Reinforced Vinyl windows. Vinyl clad wood window shall use the U-factors listed for Wood/Vinyl windows. Any vinyl frame window with metal reinforcement in more than one rail shall use the U-factors listed for Aluminum Clad Wood/Reinforced Vinyl window.


TABLE 10-6C

Group R Occupancy: DEFAULT U-FACTORS FOR DOORS


Door Type No Glazing Single Glazing Double Glazing with 1/4 in. Airspace Double Glazing with 1/2 in. Airspace Double Glazing with e=0.10, 1/2 in. Argon
SWINGING DOORS (Rough opening - 38 in. x 82 in.)
Slab Doors
Wood slab in wood framea 0.46
6% glazing (22 in. x 8 in. lite) - 0.48 0.47 0.46 0.44
25% glazing (22 in. x 36 in. lite) - 0.58 0.48 0.46 0.42
45% glazing (22 in. x 64 in. lite) - 0.69 0.49 0.46 0.39
More than 50% glazing Use Table 10-6A
Insulated steel slab with wood edge in wood framea 0.16
6% glazing (22 in. x 8 in. lite) - 0.21 0.20 0.19 0.18
25% glazing (22 in. x 36 in. lite) - 0.39 0.28 0.26 0.23
45% glazing (22 in. x 64 in. lite) - 0.58 0.38 0.35 0.26
More than 50% glazing Use Table 10-6A
Foam insulated steel slab with metal edge in steel frameb 0.37
6% glazing (22 in. x 8 in. lite) - 0.44 0.42 0.41 0.39
25% glazing (22 in. x 36 in. lite) - 0.55 0.50 0.48 0.44
45% glazing (22 in. x 64 in. lite) - 0.71 0.59 0.56 0.48
More than 50% glazing Use Table 10-6A
Cardboard honeycomb slab with metal edge in steel frameb 0.61
Style and Rail Doors
Sliding glass doors/French doors Use Table 10-6A
Site-Assembled Style and Rail Doors
Aluminum in aluminum frame - 1.32 0.99 0.93 0.79
Aluminum in aluminum frame with thermal break - 1.13 0.80 0.74 0.63
REVOLVING DOORS (Rough opening - 82 in. x 84 in.)
Aluminum in aluminum frame
Open - 1.32 - - -
Closed - 0.65 - - -
SECTIONAL OVERHEAD DOORS (Nominal - 10 ft x 10 ft)
Uninsulated steel (nominal U =1.15)c 1.15 - - - -
Insulated steel (nominal U =0.11)c 0.24 - - - -
Insulated steel with thermal break (nominal U = 0.08)c 0.13 - - - -

a. Thermally broken sill (add 0.03 for nonthermally broken sill)
b. Nonthermally broken sill
c. Nominal U-factors are through the center of the insulated panel before consideration of thermal bridges around the edges of the door sections and due to the frame.


TABLE 10-6D

Group R Occupancy: DEFAULT U-FACTORS FOR GLAZED DOORS

See Table 10-6C


TABLE 10-6E

Group R Occupancy: DEFAULT U-FACTORS FOR OVERHEAD GLAZING

Frame Type
Aluminum Aluminum Reinforced Wood or Vinyl-
Glazing Type without with Vinyl/ Clad Wood/
Thermal Thermal Aluminum-Clad Vinyl without
Break Break Wood or Vinyl Reinforcing
Single Glazing
glass U-1.58 U-1.51 U-1.40 U-1.18
acrylic/polycarb U-1.52 U-1.45 U-1.34 U-1.11
Double Glazing
air U-1.05 U-0.89 U-0.84 U-0.67
argon U-1.02 U-0.86 U-0.80 U-0.64
Double Glazing, e=0.20
air U-0.96 U-0.80 U-0.75 U-0.59
argon U-0.91 U-0.75 U-0.70 U-0.54
Double Glazing, e=0.10
air U-0.94 U-0.79 U-0.74 U-0.58
argon U-0.89 U-0.73 U-0.68 U-0.52
Double Glazing, e=0.05
air U-0.93 U-0.78 U-0.73 U-0.56
argon U-0.87 U-0.71 U-0.66 U-0.50
Triple Glazing
air U-0.90 U-0.70 U-0.67 U-0.51
argon U-0.87 U-0.69 U-0.64 U-0.48
Triple Glazing, e=0.20
air U-0.86 U-0.68 U-0.63 U-0.47
argon U-0.82 U-0.63 U-0.59 U-0.43
Triple Glazing, e=0.20 on 2 surfaces
air U-0.82 U-0.64 U-0.60 U-0.44
argon U-0.79 U-0.60 U-0.56 U-0.40
Triple Glazing, e=0.10 on 2 surfaces
air U-0.81 U-0.62 U-0.58 U-0.42
argon U-0.77 U-0.58 U-0.54 U-0.38
Quadruple Glazing, e=0.10 on 2 surfaces
air U-0.78 U-0.59 U-0.55 U-0.39
argon U-0.74 U-0.56 U-0.52 U-0.36
krypton U-0.70 U-0.52 U-0.48 U-0.32

1. U-factors are applicable to both glass and plastic, flat and domed units, all spacers and gaps.
2. Emissivities shall be less than or equal to the value specified.
3. Gap fill shall be assumed to be air unless there is a minimum of 90% argon or krypton.
4. Aluminum frame with thermal break is as defined in footnote 9 to Table 10-6B.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-1006, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-1006, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, 51-11-1006, filed 2/10/94, effective 4/1/94. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, 51-11-1006, filed 12/19/90, effective 7/1/91.]


AMENDATORY SECTION(Amending WSR 93-21-052, filed 10/18/93, effective 4/1/94)

WAC 51-11-1401   Scope.   This section covers the determination of requirements, system and component performance, control requirements and duct construction.


((EXCEPTION: Special applications, including but not limited to hospitals, laboratories, thermally sensitive equipment, and rooms designed to comply with the special construction and fire protection requirements of NFPA 75, "Standard for the Protection of Electronic Computer/Data Processing Equipment" may be exempt from the requirements of this section when approved by the building official. Exemptions shall be specific on a case-by-case basis and allowed only to the extent necessary to accommodate the special applications.))

[Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1401, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-1411   HVAC equipment performance requirements.  


1411.1 General: Equipment shall have a minimum performance at the specified rating conditions not less than the values shown in Tables 14-1A through ((14-3)) 14-1G. If a nationally recognized certification program exists for a product covered in Tables 14-1A through ((14-3)) 14-1G, and it includes provisions for verification and challenge of equipment efficiency ratings, then the product shall be listed in the certification program.


Gas-fired and oil-fired forced air furnaces with input ratings ≥ 225,000 Btu/h (65 kW) 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% of the input rating.


1411.2 Rating Conditions: Cooling equipment shall be rated at ARI test conditions and procedures when available. Where no applicable procedures exist, data shall be furnished by the equipment manufacturer.


1411.3 Combination Space and Service Water Heating: For combination space and service water heaters with a principal function of providing space heat, the Combined Annual Efficiency (CAE) may be calculated by using ASHRAE Standard 124-1991. Storage water heaters used in combination space heat and water heat applications shall have either an Energy Factor (EF) or a Combined Annual Efficiency (CAE) of not less than the following:


Energy Factor

(EF)

Combined Annual Efficiency (CAE)
< 50 gallon storage 0.58 0.71
50 to 70 gallon storage 0.57 0.71
> 70 gallon storage 0.55 0.70

1411.4 Packaged Electric Heating and Cooling Equipment: Packaged electric equipment providing both heating and cooling with a total cooling capacity greater than 20,000 Btu/h shall be a heat pump.


EXCEPTION: Unstaffed equipment shelters or cabinets used solely for personal wireless service facilities.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-1411, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-1411, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1411, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-1412   Controls.  


1412.1 Temperature Controls: Each system shall be provided with at least one temperature control device. Each zone shall be controlled by individual thermostatic controls responding to temperature within the zone. At a minimum, each floor of a building shall be considered as a separate zone.


1412.2 Deadband Controls: When used to control both comfort heating and cooling, zone thermostatic controls shall be capable of a deadband of at least 5 degrees F within which the supply of heating and cooling energy to the zone is shut off or reduced to a minimum.


EXCEPTIONS: 1. Special occupancy, special usage, or code requirements where deadband controls are not appropriate.
2. Buildings complying with Section 1141.4, if in the proposed building energy analysis, heating and cooling thermostat setpoints are set to the same temperature between 70 degrees F and 75 degrees F inclusive, and assumed to be constant throughout the year.
3. Thermostats that require manual changeover between heating and cooling modes.
1412.3 Humidity Controls: If a system is equipped with a means for adding moisture, a humidistat shall be provided.


1412.4 Setback and Shut-Off: HVAC systems shall be equipped with automatic controls capable of accomplishing a reduction of energy use through control setback or equipment shutdown during periods of non-use or alternate use of the spaces served by the system. The automatic controls shall have a minimum seven-day clock and be capable of being set for seven different day types per week.


EXCEPTIONS: 1. Systems serving areas which require continuous operation at the same temperature setpoint.
2. Equipment with full load demands of 2 Kw (6,826 Btu/h) or less may be controlled by readily accessible manual off-hour controls.
1412.4.1 Dampers: Outside air intakes, exhaust outlets and relief outlets serving conditioned spaces shall be equipped with motorized dampers which close automatically when the system is off or upon power failure.


EXCEPTIONS: 1. Systems serving areas which require continuous operation.
2. Combustion air intakes.
3. Gravity (nonmotorized) dampers are acceptable in buildings less than 3 stories in height.
4. Gravity (nonmotorized) dampers are acceptable in exhaust and relief outlets in the first story and levels below the first story of buildings three or more stories in height.

Dampers installed to comply with this section, including dampers integral to HVAC equipment, shall have a maximum leakage rate when tested in accordance with AMCA Standard 500 of:

(a) Motorized dampers: 10 cfm/ft2 of damper area at 1.0 in w.g.

(b) Nonmotorized dampers: 20 cfm/ft2 of damper area at 1.0 in w.g., except that for nonmotorized dampers smaller than 24 inches in either dimension: 40 cfm/ft2 of damper area at 1.0 in w.g.

Drawings shall indicate compliance with this section.


1412.4.2 Optimum Start Controls: Heating and cooling systems with design supply air capacities exceeding 10,000 cfm shall have optimum start controls. Optimum start controls shall be designed to automatically adjust the start time of an HVAC system each day to bring the space to desired occupied temperature levels immediately before scheduled occupancy. The control algorithm shall, as a minimum, be a function of the difference between space temperature and occupied setpoint and the amount of time prior to scheduled occupancy.


1412.5 Heat Pump Controls: 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).


1412.6 Combustion Heating Equipment Controls: Combustion heating equipment with a capacity over 225,000 Btu/h shall have modulating or staged combustion control.


EXCEPTIONS: Boilers.
Radiant heaters.
1412.7 Balancing: Each air supply outlet or air or water terminal device shall have a means for balancing, including but not limited to, dampers, temperature and pressure test connections and balancing valves.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-1412, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-1412, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1412, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending 93-21-052, filed 10/18/93, effective 4/1/94)

WAC 51-11-1413   ((Air)) Economizers.  


1413.1 Operation: Air economizers shall be capable of automatically modulating outside and return air dampers to provide 100 percent of the design supply air as outside air to reduce or eliminate the need for mechanical cooling. Air economizers shall be used for RS-29 analysis base case for all systems without exceptions in Sections 1413, 1423, or 1433. Water economizers shall be capable of providing the total concurrent cooling load served by the connected terminal equipment lacking airside economizer, at outside air temperatures of 45F dry-bulb/40F wet-bulb and below. For this calculation, all factors including solar and internal load shall be the same as those used for peak load calculations, except for the outside temperatures.


EXCEPTION: Water economizers using air-cooled heat rejection equipment may use a 35F dry-bulb outside air temperature for this calculation. This exception is limited to a maximum of 20 tons per building.


1413.2 ((Control: Air economizers shall be controlled by a control system capable of determining if outside air can meet part or all of the building's cooling loads.)) Documentation: Water economizer plans submitted for approval shall include the following information:


1. Maximum outside air conditions for which economizer is sized to provide full cooling.

2. Design cooling load to be provided by economizer at this outside air condition.

3. Heat rejection and terminal equipment performance data including model number, flow rate, capacity, entering and leaving temperature in full economizer cooling mode.


1413.3 Integrated Operation: ((Building Heating Energy:)) The HVAC system and its controls shall allow economizer operation when mechanical cooling is required simultaneously. Air and water economizers shall be capable of providing partial cooling even when additional mechanical cooling is required to meet the remainder of the cooling load. ((Controls shall not preclude the economizer operation when mechanical cooling is required simultaneously.))


EXCEPTIONS: ((Economizers on individual, direct expansion, cooling systems with capacities not greater than 75,000 Btu/h may include controls that limit simultaneous operation of the economizer and mechanical cooling for the purpose of preventing ice formation on cooling coils.))
1. Individual, direct expansion units that have a rated capacity less than 65,000 Btu/h and use nonintegrated economizer controls that preclude simultaneous operation of the economizer and mechanical cooling.
2. Water-cooled water chillers.


1413.4 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) that cools return air while humidifying outside air while in economizer. If a water economizer or no economizer is provided, the isothermal type of humidifier may be used (steam injection, gas, electric resistance or infrared generator type that uses new energy to boil moisture to be added).

[Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1413, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-1423   Economizers.   Economizers meeting the requirements of Section 1413 shall be installed on single package unitary fan-cooling units having a supply capacity of greater than 1,900 cfm or a total cooling capacity greater than 54,000 Btu/h including those serving computer server rooms, electronic equipment, radio equipment, telephone switchgear.


The total capacity of all units without economizers shall not exceed ((240,000)) 120,000 Btu/h per building, or ((10%)) 5% of its aggregate cooling (economizer) capacity, whichever is greater. That portion of the equipment serving Group R occupancy is not included in determining the total capacity of all units without economizers in a building.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-1423, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-1423, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1423, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-1433   Economizers.   Air economizers meeting the requirements of Section 1413 shall ((be installed on the following systems:)) be provided on all new systems including those serving computer server rooms, electronic equipment, radio equipment, telephone switchgear.


((a. Single package unitary fan-cooling units with a supply capacity of greater than 1,900 cfm or a total cooling capacity greater than 54,000 Btu/h.
b. Other individual fan-cooling units with a supply capacity of greater than 2,800 cfm or a total cooling capacity greater than 84,000 Btu/h.

The total capacity of all units without economizers shall not exceed 240,000 Btu/h per building, or 10% of it's aggregate cooling (economizer) capacity, whichever is greater. That portion of the equipment serving Group R occupancy is not included in determining the total capacity of all units without economizers in a building.


EXCEPTIONS: 1. Systems with air or evaporatively cooled condensers and that either one of the following can be demonstrated to the satisfaction of the enforcing agency:
a. Special outside air filtration and treatment, for the reduction and treatment of unusual outdoor contaminants, makes an air economizer infeasible.
b. The use of outdoor air cooling affects the operation of other systems (such as humidification, dehumidification, and supermarket refrigeration systems) so as to increase the overall building energy consumption.
2. Systems for which at least 75 percent of the annual energy used for mechanical cooling is provided from site-recovery or site-solar energy source.
3. A water economizer system, which is capable of cooling supply air by indirect evaporation. Such a system shall be designed and capable of being controlled to provide 100 percent of the expected system cooling load at outside air temperatures of 50 degrees F dry-bulb/45 degrees F wet-bulb and below. For this calculation, all factors including solar and internal load shall be the same as those used for peak load calculations, except for the outside air temperatures.))

EXCEPTIONS: 1. Single package unitary fan-cooling units installed outdoors or in a mechanical room adjacent to outdoors with a total cooling capacity less than 20,000 Btu/h. Other single package unitary fan-cooling units with a total cooling capacity less than 54,000 Btu/h. The total capacity of all such systems without economizers shall not exceed 120,000 Btu/h per building, or 5% of its air economizer capacity, whichever is greater. That portion of the equipment serving Group R occupancy is not included in determining the total capacity of all units without economizers in a building.
2. Water-cooled refrigeration equipment provided with a water economizer meeting the requirements of Section 1413. Water economizer capacity per building shall not exceed 500 tons. This exception shall not be used for RS-29 analysis.
3. Systems for which at least 75% of the annual energy used for mechanical cooling is provided from site-recovery or site-solar energy source.
4. Systems where special outside air filtration and treatment, for the reduction and treatment of unusual outdoor contaminants, makes an air economizer infeasible.
5. Systems that affect other systems (such as dehumidification and supermarket refrigeration systems) so as to increase the overall building energy consumption. New humidification equipment shall comply with Section 1413.4.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-1433, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-1433, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1433, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending WSR 93-21-052, filed 10/18/93, effective 4/1/94)

WAC 51-11-1437   Electric motor efficiency.   Design A & B squirrel-cage, T-frame induction permanently wired polyphase motors of 1 hp or more having synchronous speeds of 3,600, 1,800 and 1,200 rpm shall have a nominal full-load motor efficiency no less than the corresponding values for energy efficient motors provided in Table 14-4.


EXCEPTIONS:
1. Motors used in systems designed to use more than one speed of a multi-speed motor.
2. Motors used as a component of the equipment meeting the minimum equipment efficiency requirements of Section 1411 and Tables 14-1A ((and 14-2)) through 14-1G provided that the motor input is included when determining the equipment efficiency.
3. Motors that are an integral part of specialized process equipment.
4. Where the motor is integral to a listed piece of equipment for which no complying motor has been approved.

[Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1437, filed 10/18/93, effective 4/1/94.]


AMENDATORY SECTION(Amending WSR 98-03-003, filed 1/8/98, effective 7/1/98)

WAC 51-11-1452   (((Reserved.))) Pool water heaters.   Heat pump pool heaters shall have a minimum COP of 4.0 determined in accordance with ASHRAE Standard 146, Method of Testing for Rating Pool Heaters. Other pool heating equipment shall comply with the applicable efficiencies in Tables 14-1A through 14-1G.

[Statutory Authority: RCW 19.27A.025 and 19.27A.045. 98-03-003, 51-11-1452, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1452, filed 10/18/93, effective 4/1/94.]

OTS-5003.2


AMENDATORY SECTION(Amending WSR 01-03-010, filed 1/5/01, effective 7/1/01)

WAC 51-11-1454   Pool covers.   Heated pools shall be equipped with a vapor retardant pool cover on or at the water surface. Pools heated to more than 90 degrees F shall have a pool cover with a minimum insulation value of R-12.

((TABLE 14-1

Standard Rating Conditions and Minimum Performance for

Air Cooled Unitary Air Conditioners, Heat Pumps, Packaged Terminal Air Conditioners,

Warm Air Furnaces, Duct Furnaces and Unit Heaters


Equipment Type &

Rating

Category Sub-category &

Rating Conditions

Minimum Rating Standard
Steady State Seasonal or Part

Load

Air Conditioners

and Heat Pumps

Cooling

Ratings

≤65,000 Btu/h

Cooling Capacity

Split Systems

Single Package

NA

NA

10.0 SEER

9.7 SEER

ARI 210/240

-1989

>65,000 and

≤135,000 Btu/h

Cooling Capacity

All Unitary

Standard Ratings:

8.9 EER

95F db

8.3 IPLV

80F db

>135,000 and

≤760,000 Btu/h1

Cooling Capacity

Air Conditioners

Heat Pumps

8.5 EER

8.5 EER

7.5 IPLV

7.5 IPLV

ARI 360

-1986

>760,000 Btu/h1

Cooling Capacity

Air Conditioners

Heat Pumps

8.2 EER

8.7 EER

7.5 IPLV

7.5 IPLV

Packaged Term. Air

Conditioners & Heat

Pumps Cooling

Ratings

All Capacities Air Conditioners and

Heat Pumps

Standard/Low Temp[:]

10.0 - (0.16 x

Cap/1000)3

EER

95F`

12.2 - (0.20 x

Cap/1000)2,3

EER

82F

ARI 310

-1990

Heat Pump

Heating

Ratings

≤65,000 Btu/h

Cooling Capacity

Split Systems

Single Package

6.8 HSPF

6.6 HSPF

ARI 210/240

-1989

>65,000 and

≤135,000 Btu/h

Cooling Capacity

All Unitary

Standard Ratings:

3.0 COP

47F db/43F wb

2.0 COP

17F db/15F wb

>135,000 Btu/h

Cooling Capacity

Standard Ratings[:]

2.9 COP

47F

2.0 COP

17F

ARI 365

-1986

Packaged Term.

Heat Pumps

Heating Ratings

All Capacities Heat Pumps

Standard Ratings[:]

2.9 - (0.026 x Cap/1000)3

COP

47F db/43F wb

ARI 380

-1990

Warm Air

Furnaces &

Combination

Furnace/A.C.

<225,000 Btu/h Gas and Oil Fired

Seasonal Ratings[:]

80% Et4 78% AFUE5 DOE 10 CFR

Part430 AppN

≥225,000 Btu/h Gas, Max Rating6

Gas, Min Rating6

80% Et4

78% Et4

NA

NA

ANSI Z21.47

-1983

≥225,000 Btu/h Oil, Max Rating6

Oil, Min Rating6

81% Et4

81% Et4

NA

NA

UL 727

-1986

Warm-Air

Duct Furnaces

and Unit Heaters

All Size Gas Duct

Furnaces

Max Rated Capacity6

Min Rated Capacity6

78% Et4

75% Et4

NA

NA

ANSI Z83.9

-1986

All Size Gas Unit

Heaters

Max Rated Capacity6

Min Rated Capacity6

78% Et4

74% Et4

NA

NA

ANSI Z83.8

-1985

All Size Oil Unit

Heaters

Max Rated Capacity6

Min Rated Capacity6

81% Et4

81% Et4

NA

NA

UL 731

-1988


))
1. For units that have a heating section, deduct 0.2 from all required EER's and IPLV's.
2. For multi-capacity equipment the minimum performance shall apply to each step provided Multi-capacity refers to manufacturer published rating for more than one capacity mode allowed by the product's controls.
3. Capacity (Cap) means the rated cooling capacity of the product in Btu/h in accordance with the cited ARI standard. If the unit's capacity is less than 7,000 Btu/h, use 7,000 Btu/h in the calculation. If the unit's capacity is greater than 15,000 Btu/h, use 15,000 Btu/h in the calculation.
4. These values apply to non-NAECA equipment. See referenced standard for definition of Thermal efficiency (Et), (100% flue losses).

((TABLE 14-2

Standard Rating Conditions and Minimum Performance for

Water and Evaporatively Cooled Unitary Air Conditioners, Heat Pumps, Water Source and Ground Source

Heat Pumps, Condensing Units, and Water Chilling Packages


Equipment Type &

Rating

Category

Sub-category &

Rating Conditions

Minimum Rating Standard
Steady State Seasonal or

Part Load

Evaporatively

Cooled A/Cs &

Heat Pumps

Cooling Ratings

≤65,000 Btu/h

Cooling Capacity

Standard Conditions1:

Outdoor Conditions:

95F db/75F wb

9.3 EER 8.5 IPLV ARI 210/240

-1989

CTI 201

-1986

>65,000 and ≤135,000 Btu/h

Cooling Capacity

10.5 EER 9.7 IPLV
Water Source

Heat Pump

Cooling Ratings

≤65,000 Btu/h

Cooling Capacity

Standard Conditions1:

Entering Water[:]

9.3 EER

85F ewt2

10.2 EER

75F ewt2

ARI 320

-1986

CTI 201

-1986

>65,000 and ≤135,000 Btu/h

Cooling Capacity

Standard Conditions1:

Entering Water[:]

10.5 EER

85F ewt2

NA
Ground Water

Heat Pump

Cooling Ratings

<135,000 Btu/h

Cooling Capacity

Standard Conditions1:

Entering Water[:]

11.0 EER

70F ewt2

11.5 EER

50F ewt2

ARI 325

-1985

Water Cooled

Unitary Air

Conditioners

Cooling Ratings

≤65,000 Btu/h

Cooling Capacity

Standard Conditions1:

Entering Water[:]

9.3 EER

85F ewt2

8.3 IPLV

75F ewt2

ARI 210/240

-1989

CTI 201

-1986

>65,000 and ≤135,000 Btu/h

Cooling Capacity

Standard Conditions1:

Entering Water[:]

10.5 EER

85F ewt2

NA
Water/Evap

Cooled Air Cond.

and Heat Pumps

Cooling Ratings

>135,000 Btu/h

Cooling Capacity

Standard Conditions1: 9.6 EER 9.0 IPLV ARI 360

-1986

CTI 201

-1986

Air and Water/Evap Cooled Condensing Units Cooling Ratings3 >135,000 Btu/h

Cooling Capacity

Air Cooled

Water/Evap Cooled

9.9 EER

12.9 EER

11.0 IPLV

12.9 IPLV

ARI 365

-1987

CTI 201

-1986

Air and Water Cooled Water Chilling Packages Cooling Ratings <150 Tons

≥150 and <300 Tons

≥300 Tons

Water Cooled 3.8 COP

4.2 COP

5.2 COP4

3.9 IPLV

4.5 IPLV

5.3 IPLV4

ARI 550-90

ARI 590-86pN

CTI 201

-1986

<150 Tons

≥150 Tons

Air Cooled

with Condenser

2.7 COP

2.5 COP

2.8 IPLV

2.5 IPLV

All Capacities Air Cooled

Condenserless

3.1 COP 3.2 IPLV
Water & Ground-Water Source Heat Pumps Heating Ratings <135,000 Btu/h

Cooling Capacity

Water Source

Standard Conditions1:

3.8 COP

70F ewt2

NA

NA

ARI 320

-1986

Ground Water Source Standard Conditions1: 3.4 COP

70F ewt2

3.0 COP

50F ewt2

ARI 325

-1985


))
1. Standard Indoor Conditions: 80F dry bulb and 67F wet bulb.
2. ewt: Entering Water Temperature for water cooled heat pumps and air conditioners.
3. Condensing unit requirements are based on single - number rating defined in paragraph 5.1.3.2 of ARI Standard 365.
4. These requirements are reduced to 4.7 COP and 4.8 IPLV, where refrigerants with ozone depletion factors of 0.05 or less are used. No reduction is allowed for standard design systems analyzed under RS-29.

((TABLE 14-3

Standard Rating Conditions and Minimum Performance,

Gas- and Oil-Fired Boilers


Reference Category Rating Condition Minimum Performance
DOE Test Procedure

10 CFR, Part 430

AppN

Gas-Fired

<300,000 Btu/h

Seasonal

Rating

AFUE

80%1,3

Oil-Fired

<300,000 Btu/h

Seasonal

Rating

AFUE

80%1

ANSI Z21.13-87

H.I. Htg. Boiler Std. 86

ASME PTC4.1-64

U.L. 795-73

Gas-Fired

≥300,000 Btu/h

1. Max. Rated Capacity2

Steady-State

Ec4

80%

2. Min. Rated Capacity2 Steady-State Ec4

80%

U.L. 726-75

H.I. Htg. Boiler Std. 86

ASME PTC4.1-64

Oil-Fired

≥300,000 Btu/h

1. Max. Rated Capacity2

Steady-State

Ec4

83%

2. Min. Rated Capacity2 Steady-State Ec4

83%

H.I. Htg. Boiler Std. 86

ASME PTC4.1-64

Oil-Fired (Residual)

≥300,000 Btu/h

1. Max. Rated Capacity2

Steady-State

Ec4

83%

2. Min. Rated Capacity2 Steady-State Ec4

83%


))
1. To be consistent with National Appliance Energy Conservation Act of 1987 (P.L. 100-12).
2. Provided and allowed by the controls.
3. Except for gas-fired steam boilers for which minimum AFUE is 75%.
4. Ec= combustion efficiency, 100% - flue losses. See reference document for detailed information.


Table 14-1A

Unitary Air Conditioners and Condensing Units, Electrically Operated, Minimum Efficiency Requirements


Equipment Type Size Category Sub-Category or Rating Condition Minimum Efficiencyb Test Procedurea
Air Conditioners, Air Cooled < 65,000 Btu/hd Split System 10.0 SEER ARI 210/240
Single Package 9.7 SEER
≥65,000 Btu/h and

< 135,000 Btu/h

Split System and

Single Package

10.3 EERc
≥135,000 Btu/h and

< 240,000 Btu/h

Split System and

Single Package

9.7 EERc ARI 340/360
≥ 240,000 Btu/h and

<760,000 Btu/h

Split System and

Single Package

9.5 EERc

9.7 IPLVc

≥760,000 Btu/h Split System and

Single Package

9.2 EERc

9.4 IPLVc

Air Conditioners, Water and Evaporatively Cooled < 65,000 Btu/h Split System and

Single Package

12.1 EER ARI 210/240
≥ 65,000 Btu/h and

< 135,000 Btu/h

Split System and

Single Package

11.5 EERc
≥135,000 Btu/h and

≤240,000 Btu/h

Split System and

Single Package

11.0 EERc ARI 340/360
> 240,000 Btu/h Split System and

Single Package

11.0 EERc

10.3 IPLVc

Condensing Units, Air Cooled ≥135,000 Btu/h 10.1 EER

11.2 IPLV

ARI 365
Condensing Units,Water or Evaporatively Cooled ≥135,000 Btu/h 13.1 EER

13.1 IPLV

a Reserved.

b IPLVs are only applicable to equipment with capacity modulation.

c Deduct 0.2 from the required EERs and IPLVs for units with a heating section other than electric resistance heat.

d Single-phase air-cooled air-conditioners < 65,000 Btu/h are regulated by NAECA. SEER values are those set by NAECA.


Table 14-1B

Unitary and Applied Heat Pumps, Electrically Operated, Minimum Efficiency Requirements



Equipment Type Size Category Sub-Category or Rating Condition Minimum Efficiencyb Test Procedurea
Air Cooled, (Cooling Mode) < 65,000 Btu/hd Split System 10.0 SEER ARI 210/240
Single Package 9.7 SEER
≥65,000 Btu/h and

< 135,000 Btu/h

Split System and

Single Package

10.1 EERc
≥135,000 Btu/h and

<240,000 Btu/h

Split System and

Single Package

9.3 EERc ARI 340/360

≥240,000 Btu/h Split System and

Single Package

9.0 EERc

9.2 IPLVc

Water-Source

(Cooling Mode)

< 17,000 Btu/h 86F Entering Water 11.2 EER ARI/ISO-13256-1
≥ 17,000 Btu/h and

<65,000 Btu/h

86F Entering Water 12.0 EER ARI/ISO-13256-1
≥65,000 Btu/h and

< 135,000 Btu/h

86F Entering Water 12.0 EER ARI/ISO-13256-1
Groundwater-Source (Cooling Mode) < 135,000 Btu/h 59F Entering Water 16.2 EER ARI/ISO-13256-1
Ground Source

(Cooling Mode)

< 135,000 Btu/h 77F Entering Water 13.4 EER ARI/ISO-13256-1
Air Cooled

(Heating Mode)

< 65,000 Btu/hd

(Cooling Capacity)

Split System 6.8 HSPF ARI 210/240
Single Package 6.6 HSPF
≥65,000 Btu/h and

< 135,000 Btu/h

(Cooling Capacity)

47F db/43F wb Outdoor Air

17F db/15F wb Outdoor Air

3.2 COP


2.2 COP

≥135,000 Btu/h

(Cooling Capacity)

47F db/43F wb Outdoor Air

17F db/15F wb Outdoor Air

3.1 COP


2.0 COP

ARI 340/360

Water-Source

(Heating Mode)

< 135,000 Btu/h

(Cooling Capacity)

68F Entering Water 4.2 COP ARI/ISO-13256-1
Groundwater-Source

(Heating Mode)

< 135,000 Btu/h

(Cooling Capacity)

50F Entering Water 3.6 COP ARI/ISO-13256-1
Ground Source

(Heating Mode)

< 135,000 Btu/h

(Cooling Capacity)

32F Entering Water 3.1 COP ARI/ISO-13256-1
a Reserved.

b IPLVs and part load rating conditions are only applicable to equipment with capacity modulation.

c Deduct 0.2 from the required EERs and IPLVs for units with a heating section other than electric resistance heat.

d Single-phase air-cooled heat pumps < 65,000 Btu/h are regulated by NAECA. SEER and HSPF values are those set by NAECA.


Table 14-1C

Water Chilling Packages, Minimum Efficiency Requirements



Equipment Type Size Category Sub-Category or Rating Condition Minimum Efficiencyb Test Procedurea
Air Cooled, With Condenser,

Electrically Operated

All Capacities 2.80 COP

3.05 IPLV

ARI 550/590
Air Cooled,

Without Condenser,

Electrically Operated

All Capacities 3.10 COP

3.45 IPLV

Water Cooled, Electrically Operated, Positive Displacement

(Reciprocating)

All Capacities 4.20 COP

5.05 IPLV

ARI 550/590
Water Cooled,

Electrically Operated,

Positive Displacement

(Rotary Screw and Scroll)

< 150 Tons 4.45 COP

5.20 IPLV

ARI 550/590
≥150 Tons and

< 300 Tons

4.90 COP

5.60 IPLV

≥300 Tons 5.50 COP

6.15 IPLV

Water Cooled, Electrically Operated, Centrifugal < 150 Tons 5.00 COP

5.25 IPLV

ARI 550/590
≥150 Tons and

< 300 Tons

5.55 COP

5.90 IPLV

≥300 Tons 6.10 COP

6.40 IPLV

Air Cooled Absorption

Single Effect

All Capacities 0.60 COP

Water Cooled Absorption

Single Effect

All Capacities 0.70 COP
Absorption Double Effect,

Indirect-Fired

All Capacities 1.00 COP

1.05 IPLV

ARI 560
Absorption Double Effect,

Direct-Fired

All Capacities 1.00 COP

1.00 IPLV

a Reserved.

b The chiller equipment requirements do not apply for chillers used in low temperature applications where the design leaving fluid temperature is less than or equal to 40F.


Table 14-1D

Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Room Air Conditioners, and Room Air Conditioner Heat Pumps, Electrically Operated, Minimum Efficiency Requirements



Equipment Type Size Category (Input) Sub-Category or Rating Condition Minimum Efficiencyb Test Procedurea
PTAC (Cooling Mode)

New Construction

All Capacities 95F db Outdoor Air 12.5 - (0.213 x Cap/1000)b EER

PTAC (Cooling Mode) Replacementsc All Capacities 95F db Outdoor Air 10.9 - (0.213 x Cap/1000)b EER ARI 310/380
PTHP (Cooling Mode)

New Construction

All Capacities 95F db Outdoor Air 12.3 - (0.213 x Cap/1000)b EER
PTHP (Cooling Mode)

Replacementsc

All Capacities 95F db Outdoor Air 10.8 - (0.213 x Cap/1000)b EER
PTHP (Heating Mode)

New Construction

All Capacities

3.2 - (0.026 x Cap/1000)b COP
PTHP (Heating Mode)

Replacementsc

All Capacities 2.9 - (0.026 x Cap/1000)b COP

Room Air Conditioners, with Louvered Sides < 6,000 Btu/h 9.7 EER ANSI/AHAM RAC-1
≥6,000 Btu/h and

< 8,000 Btu/h

9.7 EER
≥ 8,000 Btu/h and

< 14,000 Btu/h

9.8 EER
≥14,000 Btu/h and

< 20,000 Btu/h

9.7 EER
≥20,000 Btu/h 8.5 EER
Room Air Conditioners, without Louvered Sides < 8,000 Btu/h 9.0 EER
≥8,000 Btu/h and

< 20,000 Btu/h

8.5 EER
≥20,000 Btu/h 8.5 EER
Room Air Conditioner Heat Pumps with Louvered Sides < 20,000 Btu/h 9.0 EER
≥ 20,000 Btu/h 8.5 EER
Room Air Conditioner Heat Pumps without Louvered Sides < 14,000 Btu/h 8.5 EER
≥ 14,000 Btu/h 8.0 EER
Room Air Conditioner, Casement Only All Capacities 8.7 EER
Room Air Conditioner, Casement Slider All Capacities 9.5 EER
a Reserved.

b Cap means 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 calculation.

c Replacement units must be factory labeled as follows: "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-in. high and less than 42-in. wide.

d Casement room air conditioners are not separate product classes under current minimum efficiency column.

e New room air conditioner standards, covered by NAECA became effective October 1, 2000.


Table 14-1E

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) Sub-Category or Rating Condition Minimum Efficiencyb Test Procedurea
Warm Air Furnace,

Gas-Fired

< 225,000 Btu/h

(66 kW)

78% AFUE or

80% Etc

DOE 10 CFR

Part 430 or

ANSI Z21.47

≥225,000 Btu/h

(66 kW)

Maximum Capacityc


Minimum Capacityc

80% Ecf ANSI Z21.47
Warm Air Furnace,

Oil-Fired

< 225,000 Btu/h

(66 kW)

78% AFUE or


80% Etc

DOE 10 CFR Part 430 or

UL 727

≥225,000 Btu/h

(66 kW)

Maximum Capacityb


Minimum Capacityb

81% Etg

____

UL 727
Warm Air

Duct Furnaces,

Gas-Fired

All Capacities Maximum Capacityb


Minimum Capacityb

80% Ece

____

ANSI Z83.9

Warm Air Unit Heaters,

Gas-Fired

All Capacities Maximum Capacityb


Minimum Capacityb

80% Ece

____

ANSI Z83.8

Warm Air

Unit Heaters,

Oil-Fired

All Capacities Maximum Capacityb


Minimum Capacityb

80% Ece

____

UL 731
a Reserved.

b Minimum and maximum ratings as provided for and allowed by the unit's controls.

c Combination units not covered by NAECA (3-phase power or cooling capacity greater than or equal to 65,000 Btu/h [19 kW]) may comply with either rating.

d Et = Thermal efficiency. See test procedure for detailed discussion.

e Ec = Combustion efficiency (100% less flue losses). See test procedure for detailed discussion.

f Ec = Combustion efficiency. Units must also include an IID, have jacket losses not exceeding 0.75% 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.

g Et = Thermal efficiency. Units must also include an IID, have jacket losses not exceeding 0.75% 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.


Table 14-1F

Boilers, Gas- and Oil-Fired, Minimum Efficiency Requirements



Equipment Typef Size Category Sub-Category or Rating Condition Minimum Efficiencyb Test Procedure
Boilers, Gas-Fired < 300,000 Btu/h Hot Water 80% AFUE DOE 10 CFR

Part 430

Steam 75% AFUE
≥300,000 Btu/h and ≤ 2,500,000 Btu/h Maximum Capacityb 75% Et

H.I. Htg Boiler Std

> 2,500,000 Btu/hf Hot Water 80% Ec
> 2,500,000 Btu/hf Steam 80% Ec
Boilers, Oil-Fired < 300,000 Btu/h 80% AFUE DOE 10 CFR

Part 430

≥300,000 Btu/h and ≤ 2,500,000 Btu/h Maximum Capacityb

78% Et

H.I. Htg Boiler Std

> 2,500,000 Btu/hf Hot Water 83% Ec
> 2,500,000 Btu/hf Steam 83% Ec
Oil-Fired (Residual) ≥300,000 Btu/h and

≤2,500,000 Btu/h

Maximum Capacityb 78% Et

H.I. Htg Boiler Std

> 2,500,000 Btu/hf Hot Water 83% Ec
> 2,500,000 Btu/hf Steam 83% Ec
a Reserved.

b Minimum and maximum ratings as provided for and allowed by the unit's controls.

c Ec = Combustion efficiency (100% less flue losses). See reference document for detailed information.

d Et = Thermal efficiency. See reference document for detailed information.

e Alternate test procedures used at the manufacturer's option are ASME PTC-4.1 for units over 5,000,000 Btu/h input, or ANSI Z21.13 for units greater than or equal to 300,000 Btu/h and less than or equal to 2,500,000 Btu/h input.

f 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.


Table 14-1G

Performance Requirements for Heat Rejection Equipment



Equipment Type Total System Heat Rejection Capacity at Rated Conditions Sub-Category or Rating Condition Minimum Efficiencyb Test Procedurec
Propeller or Axial Fan Cooling Towers All 95F (35C) Entering Water

85F (29C) Leaving Water

75F (24C) wb Outdoor Air

≥38.2 gpm/hp CTI ATC-105

and

CTI STD-201

Centrifugal Fan Cooling Towers All 95F (35C) Entering Water

85F (29C) Leaving Water

75F (24C) wb Outdoor Air

≥ 20.0 gpm/hp CTI ATC-105

and

CTI STD-201

Air Cooled Condensers All 125F (52C) Condensing Temperature

R22 Test Fluid

190F (88C) Entering Gas Temperature

15F (8C) Subcooling

95F (35C) Entering Drybulb

≥176,000 Btu/hhp ARI 460
a For purposes of this table, cooling tower performance is defined as the maximum flow rating of the tower divided by the fan nameplate rated motor power.

b 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.

c Reserved.



TABLE 14-2 RESERVED



TABLE 14-3 RESERVED

TABLE 14-4

Energy Efficient Electric Motors

Minimum Nominal Full-Load Efficiency


Open Motors Closed Motors
Synchronous

Speed (RPM)

3,600 1,800 1,200 3,600 1,800 1,200
HP Efficiency Efficiency Efficiency Efficiency Efficiency Efficiency
1.0 - 82.5 80.0 75.5 82.5 80.0
1.5 82.5 84.0 84.0 82.5 84.0 85.5
2.0 84.0 84.0 85.5 84.0 84.0 86.5
3.0 84.0 86.5 86.5 85.5 87.5 87.5
5.0 85.5 87.5 87.5 87.5 87.5 87.5
7.5 87.5 88.5 88.5 88.5 89.5 89.5
10.0 88.5 89.5 90.2 89.5 89.5 89.5
15.0 89.5 91.0 90.2 90.2 91.0 90.2
20.0 90.2 91.0 91.0 90.2 91.0 90.2
25.0 91.0 91.7 91.7 91.0 92.4 91.7
30.0 91.0 92.4 92.4 91.0 92.4 91.7
40.0 91.7 93.0 93.0 91.7 93.0 93.0
50.0 92.4 93.0 93.0 92.4 93.0 93.0
60.0 93.0 93.6 93.6 93.0 93.6 93.6
75.0 93.0 94.1 93.6 93.0 94.1 93.6
100.0 93.0 94.1 94.1 93.6 94.5 94.1
125.0 93.6 94.5 94.1 94.5 94.5 94.1
150.0 93.6 95.0 94.5 94.5 95.0 95.0
200.0 94.5 95.0 94.5 95.0 95.0 95.0

TABLE 14-5

Duct Insulation


Duct Type Duct Location Insulation

R-Value

Other

Requirements

Supply, Return Not within conditioned space: On exterior of building, on roof, in attic, in enclosed ceiling space, in walls, in garage, in crawl spaces R-7 Approved weather proof barrier
Outside air intake Within conditioned space R-7 See Section 1414.2
Supply, Return, Outside air intake Not within conditioned space: in concrete, in ground R-5.3
Supply with supply air temperature <55F or >105F Within conditioned space R-3.3
Note: Requirements apply to the duct type listed, whether heated or mechanically cooled. Mechanically cooled ducts requiring insulation shall have a vapor retarder, with a perm rating not greater than 0.5 and all joints sealed.

TABLE 14-6

Minimum Pipe Insulation (inches)1


Fluid Design

Operating

Temp. Range,

F

Insulation Conductivity Nominal Pipe Diameter (in.)
Conductivity Range

Btu in. / (h ft2 F)

Mean Rating

Temp. F

Runouts2

up to 2

1 and

less

>1 to 2 >2 to 4 >4 to 6 >6
Heating systems (Steam, Steam Condensate[,] and Hot water) Nominal Insulation Thickness
Above 350

251-350

201-250

141-200

105-140

0.32-0.34

0.29-0.31

0.27-0.30

0.25-0.29

0.24-0.28

250

200

150

125

100

1.5

1.5

1.0

0.5

0.5

2.5

2.0

1.5

1.5

1.0

2.5

2.5

1.5

1.5

1.0

3.0

2.5

2.0

1.5

1.0

3.5

3.5

2.0

1.5

1.5

3.5

3.5

3.5

1.5

1.5

Domestic and Service Hot Water Systems
105 and Greater 0.24-0.28 100 0.5 1.0 1.0 1.5 1.5 1.5
Cooling Systems (Chilled Water, Brine[,] and Refrigerant)
40-55

Below 40

0.23-0.27

0.23-0.27

75

75

0.5

1.0

0.5

1.0

0.75

1.5

1.0

1.5

1.0

1.5

1.0

1.5


1. Alternative Insulation Types. Insulation thicknesses in Table 14-6 are based on insulation with thermal conductivities within the range listed in Table14-6 for each fluid operating temperature range, rated in accordance with ASTM C 335-84 at the mean temperature listed in the table. For insulation that has a conductivity outside the range shown in Table 14-6 for the applicable fluid operating temperature range at the mean rating temperature shown (when rounded to the nearest 0.01 Btu in./(hft2F)), the minimum thickness shall be determined in accordance with the following equation:

T= PR[[(]1+ t/PR)K/k - 1]
Where

T = Minimum insulation thickness for material with conductivity K, inches.
PR = Pipe actual outside radius, inches[.]
t = Insulation thickness from Table 14-6, inches
K = conductivity of alternate material at the mean rating temperature indicated in Table 14-6 for the applicable fluid temperature range, Btu in[.]/(hft2 F)
k = the lower value of the conductivity range listed in Table 14-6 for the applicable fluid temperature range, Btu in[.]/(h ft2 F)

2. Runouts to individual terminal units not exceeding 12 ft. in length.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, 51-11-1454, filed 1/5/01, effective 7/1/01; 98-03-003, 51-11-1454, filed 1/8/98, effective 7/1/98. Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1454, filed 10/18/93, effective 4/1/94.]

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.

Washington State Code Reviser's Office