Axial Downblast Roof Exhaust Fan, Mounting Location Roof, Assembly Assembled, Blade Diameter 16 in, Housing Material Aluminum, Exhaust Airflow @ 0.000 in SP 3,024 cfm, For High-Static Pressure Applications No, High-Efficiency Motor Yes, Maximum Static Pressure 1 1/4 in wc, Motor Enclosure Open Dripproof, Motor Horsepower 1/2 hp, Nameplate Voltage 115V AC, Number of Speeds 1, Phase 1, Maximum Inlet Air Temperature 120 Degrees F, Number of Blades 4, Supply Airflow @ 0.000 in SP 3,024 cfm