C402.5.10 Recessed lighting. Recessed luminaires installed in the building thermal envelope shall be all of the following:
1. IC rated.
2. Labeled as having an air leakage rate of not more than 2.0 cfm (0.944 L/s) when tested in accordance with ASTM E 283 at a 1.57 psf (75 Pa) pressure differential.
3. Sealed with a gasket or caulk between the housing and interior wall or ceiling covering.
C402.5.11 Operable openings interlocking. Where any operable openings to the outdoors are larger than 48 square feet (4.47 m2) in area, such openings shall be interlocked with the heating and cooling system as required by Section C403.4.1.6.
EXCEPTIONS: | 1. Separately zoned areas associated with the preparation of food that contain appliances that contribute to the HVAC loads of a restaurant or similar type of occupancy. |
| 2. Warehouses that utilize overhead doors for the function of the occupancy, where approved by the code official. |
| 3. The outer entrance doors where located in the exterior wall and are part of a vestibule system. |
| 4. Alterations to existing buildings. |
[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-40248, filed 7/1/22, 6/7/23, and 9/25/23, effective 3/15/24. Statutory Authority: RCW
19.27A.025,
19.27A.160, and
19.27.074. WSR 16-03-072, § 51-11C-40248, 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-40248, filed 2/1/13, effective 7/1/13.]