WAC 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 ≥90 3.5 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 ≥90 3.5 For SI: 1 cfm = 28.3 L/min. a. Design outdoor or exhausted airflow rates/watt of fan used. For SI: 1 cfm = 28.3 L/min. a. Design outdoor or exhausted airflow rates/watt of fan used.