You must make sure each room with an exhaust hood has a source of outside air that:

1. (1) Enters the room in a way that will not interfere with the function of the hood; and
2. (2) Replaces at least ninety percent of the air taken in through the hood.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-835-11020, filed 9/5/17, effective 10/6/17. Statutory Authority: RCW 49.17.010, [49.17].040, and [49.17].050. WSR 02-15-102, § 296-835-11020, filed 7/17/02, effective 10/1/02.]