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 | |
C403.2 | 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 | |
C403.4.1 | 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 C403.7.6.2 |
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 | Except for C404.2.1 |
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, chapters
19.27A and
19.27 RCW. WSR 24-03-085, § 51-11C-40702, filed 1/16/24, effective 3/15/24; 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.]