(Effective until March 15, 2024)
Section C407.2—Mandatory requirements.
C407.2 Mandatory requirements. Compliance with this section requires compliance with those sections shown in Table C407.2.
The building permit application for projects utilizing this method shall include in one submittal all building and mechanical drawings and all information necessary to verify that the building envelope and mechanical design for the project corresponds with the annual energy analysis. If credit is proposed to be taken for lighting energy savings, then an electrical permit application shall also be submitted and approved prior to the issuance of the building permit. If credit is proposed to be taken for energy savings from other components, then the corresponding permit application (e.g., plumbing, boiler, etc.) shall also be submitted and approved prior to the building permit application. Otherwise, components of the project that would not be approved as part of a building permit application shall be modeled the same in both the proposed building and the standard reference design and shall comply with the requirements of this code.
Table C407.2
Mandatory Compliance Measures for Total Building Performance Method
Section | Title | Comments |
Envelope |
C402.5 | Air leakage | |
Mechanical |
C403.1.2 | Calculation of heating and cooling loads | |
C403.1.3 | Data centers | |
C403.2 | System design | |
C403.3.1 | Equipment and system sizing | |
C403.3.2 | HVAC equipment performance requirements | |
C403.3.6 | Ventilation for Group R occupancy | |
C403.4 | HVAC system controls | |
C403.4.1 | Thermostatic controls | Except for C403.4.1.4 |
C403.4.2 | Off-hour controls | Except for Group R |
C403.4.7 | Combustion heating equipment controls | |
C403.4.8 | Group R-1 hotel/motel guestrooms | See Section C403.7.4 |
C403.4.9 | Group R-2 and R-3 dwelling units | |
C403.4.10 | Group R-2 sleeping units | |
C403.4.11 | Direct digital control systems | |
C403.5.5 | Economizer fault detection and diagnostics (FDD) | |
C403.7 | Ventilation and exhaust systems | Except for C403.7.6 |
C403.8 | Fan and fan controls | |
C403.9.1.1 | Variable flow controls | For cooling tower fans ≥ 7.5 hp |
C403.9.1.2 | Limitation on centrifugal fan cooling towers | For open cooling towers |
C403.10 | Construction of HVAC elements | |
C403.11 | Mechanical systems located outside of the building thermal envelope | |
Service Water Heating |
C404 | Service water heating | |
Lighting and Electrical |
C405.1 | General | |
C405.2 | Lighting controls | |
C405.3 | Exit signs | |
C405.4 | Interior lighting power | |
C405.5 | Exterior building lighting power | |
C405.6 | Electrical transformers | |
C405.7 | Dwelling unit energy consumption | |
C405.8 | Electric motor efficiency | |
C405.9 | Vertical and horizontal transportation | |
C405.10 | Controlled receptacles | |
C405.11 | Voltage drop in feeders | |
Other Requirements |
C407 | Total building performance | |
C408 | System commissioning | |
C409 | Energy metering | |
C410 | Refrigeration requirements | |
C411 | Solar readiness | |
[Statutory Authority: RCW
19.27A.025,
19.27A.045 and chapter
19.27 RCW. WSR 20-21-080, § 51-11C-40702, filed 10/19/20, effective 2/1/21. Statutory Authority: RCW
19.27A.020,
19.27A.025,
19.27A.160 and chapter
19.27 RCW. WSR 19-24-040, § 51-11C-40702, filed 11/26/19, effective 7/1/20. Statutory Authority: RCW
19.27A.025,
19.27A.160, and
19.27.074. WSR 16-03-072, § 51-11C-40702, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW
19.27A.020,
19.27A.025 and chapters
19.27 and
34.05 RCW. WSR 13-04-056, § 51-11C-40702, filed 2/1/13, effective 7/1/13.]
(Effective March 15, 2024)
Section C407.2—Mandatory requirements.
C407.2 Mandatory requirements. Compliance with Section C407 also requires compliance with those sections shown in Table C407.2.
The building permit application for projects utilizing this method shall include in one submittal all building and mechanical drawings and all information necessary to verify that the building envelope and mechanical design for the project corresponds with the annual energy analysis. If credit is proposed to be taken for lighting energy savings, then an electrical permit application shall also be submitted and approved prior to the issuance of the building permit. If credit is proposed to be taken for energy savings from other components, then the corresponding permit application (e.g., plumbing, boiler, etc.) shall also be submitted and approved prior to the building permit application. Otherwise, components of the project that would not be approved as part of a building permit application shall be modeled in the baseline in accordance with ANSI/ASHRAE/IESNA 90.1 Appendix G and in the proposed model in accordance with the requirements of the Washington State Energy Code.
Table C407.2
Mandatory Compliance Measures for Total Building Performance Method
Sectiona | Title | Comments |
Envelope |
C401 | Thermal envelope certificate | |
C402.2.7 | Airspaces | |
C402.5 | Air leakage | |
Mechanical |
C403.1.2 | Calculation of heating and cooling loads | |
C403.1.3 | Data centers | |
C403.1.4 | Use of electric resistance and fossil fuel-fired HVAC heating equipment | |
C403.2 | System design | |
C403.3.1 | Equipment and system sizing | |
C403.3.2 | HVAC equipment performance requirements | |
C403.3.3 | Hot gas bypass limitation | |
C403.3.4.4 | Boiler turndown | |
C403.3.6 | Ventilation for Group R occupancy | |
C403.4.1 | Thermostatic controls | |
C403.4.2 | Off-hour controls | |
C403.4.7 | Combustion heating equipment controls | |
C403.4.8 | Group R-1 hotel/motel guestrooms | See Section C403.7.4 |
C403.4.9 | Group R-2 and R-3 dwelling units | |
C403.4.10 | Group R-2 sleeping units | |
C403.4.11 | Direct digital control systems | |
C403.5.5 | Economizer fault detection and diagnostics (FDD) | |
C403.7 | Ventilation and exhaust systems | Except for C403.7.6 |
C403.8 | Fan and fan controls | |
C403.9.1.1 | Variable flow controls | For cooling tower fans ≥ 7.5 hp |
C403.9.1.2 | Limitation on centrifugal fan cooling towers | For open cooling towers |
C403.10 | Construction of HVAC elements | |
C403.11 | Mechanical systems located outside of the building thermal envelope | |
C403.14 | Commissioning | |
Service Water Heating |
C404 | Service water heating | |
Lighting and Electrical |
C405 | Electrical power and lighting systems | |
Other Requirements |
C407 | Total building performance | |
C408 | System commissioning | |
C409 | Energy metering | |
C410 | Refrigeration requirements | |
C411b | Renewable energy | |
C412 | Compressed air systems | |
a | Reference to a code section includes all the relative subsections except as indicated in the table. |
b | Compliance with any of these sections includes compliance with any exception to that section. |
[Statutory Authority: RCW
19.27A.020,
19.27A.025,
19.27A.160 and chapters
19.27A and
19.27 RCW. WSR 22-14-091, 23-12-101, and 23-20-021, § 51-11C-40702, filed 7/1/22, 6/7/23, and 9/25/23, effective 3/15/24. Statutory Authority: RCW
19.27A.025,
19.27A.045 and chapter
19.27 RCW. WSR 20-21-080, § 51-11C-40702, filed 10/19/20, effective 2/1/21. Statutory Authority: RCW
19.27A.020,
19.27A.025,
19.27A.160 and chapter
19.27 RCW. WSR 19-24-040, § 51-11C-40702, filed 11/26/19, effective 7/1/20. Statutory Authority: RCW
19.27A.025,
19.27A.160, and
19.27.074. WSR 16-03-072, § 51-11C-40702, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW
19.27A.020,
19.27A.025 and chapters
19.27 and
34.05 RCW. WSR 13-04-056, § 51-11C-40702, filed 2/1/13, effective 7/1/13.]