Wash. Admin. Code § 51-11R-40351

Current through Register Vol. 24-21, November 1, 2024

Section 51-11R-40351 - Table R403.6.1-Mechanical ventilation system fan efficacy

TABLE R403.6.1 WHOLE HOUSE MECHANICAL VENTILATION SYSTEM FAN EFFICACY^a

System Type	Air Flow Rate (cfm)	Minimum Efficacy (cfm/watt)
HRV, ERV or balanced	Any	1.2
Range hoods	Any	2.8
In-line supply or exhaust fan	Any	3.8
Other exhaust fan	<90	2.8
Other exhaust fan	[GREATER THAN EQUAL TO]90	3.5

For SI: 1 cfm = 28.3 L/min.

a. Design outdoor or exhausted airflow rates/watt of fan used.

Wash. Admin. Code § 51-11R-40351

Amended by WSR 16-02-127, Filed 1/6/2016, effective 7/1/2016

Amended by WSR 20-01-047, Filed 12/9/2019, effective 7/1/2020

Amended by WSR 20-21-081, Filed 10/19/2020, effective 2/1/2021

Amended by WSR 23-02-060, Filed 1/3/2023, effective 7/1/2023

Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. 13-04-055, § 51-11R-40351, filed 2/1/13, effective 7/1/13.