Rated Air Flow (CFM) HVI-916 Standard:
1000 (Low Speed) | 1,712 (High Speed)
Wattage (High): 159
Efficiency @ High (CFM/Watts): 10.8
Sound Level (dba): 55
Speed Settings: 2
Silencer Duct: n/a
Rough Opening (inches): 14.5 X 22.5
Grille Dimensions (inches): 16.5 X 24.5
Attic Venting* (sq. ft.): 3.4
Open Window** (sq. ft.): 6.8
*Adequate attic ventilation must be available for the fan to operate efficiently. Recommended 1 sq. ft. of net free ventilation per 500 CFM of fan airflow.
** Windows must be opened to safely and effectively operate the fan. Recommended 1 sq. ft. of open windows per 250 CFM of fan airflow.