Axial Downblast Roof Exhaust Fan, Mounting Location Roof, Assembly Assembled, Blade Diameter 20 in, Housing Material Aluminum, Exhaust Airflow @ 0.000 in SP 5,943 cfm, For High-Static Pressure Applications No, High-Efficiency Motor No, Maximum Static Pressure 1 in wc, Motor Enclosure Totally Enclosed Air Over, Motor Horsepower 1 1/2 hp, Nameplate Voltage 208/230/460V AC, Number of Speeds 1, Phase 3, Maximum Inlet Air Temperature 120 Degrees F, Number of Blades 4