Axial Downblast Roof Exhaust Fan, Mounting Location Roof, Assembly Unassembled, Blade Diameter 42 in, Housing Material Steel, Exhaust Airflow @ 0.000 in SP 10, 151 cfm, For High-Static Pressure Applications No, High-Efficiency Motor No, Maximum Static Pressure 1/8 in wc, Motor Enclosure Open Dripproof, Motor Horsepower 1/2 hp, Nameplate Voltage 115/208-230V AC, Number of Speeds 1, Phase 1, Maximum Inlet Air Temperature 104 Degrees F, Number of Blades 6, Supply Airflow @ 0.000 in SP 10, 151 cfm