Axial Downblast Roof Exhaust Fan, Mounting Location Roof, Assembly Assembled, Blade Diameter 18 in, Housing Material Aluminum, Exhaust Airflow @ 0.000 in SP 4, 578 cfm, For High-Static Pressure Applications No, High-Efficiency Motor No, Maximum Static Pressure 1 3/4 in wc, Motor Enclosure Open Dripproof, Motor Horsepower 1 hp, Nameplate Voltage 115/208-230V AC, Number of Speeds 1, Phase 1, Maximum Inlet Air Temperature 120 Degrees F, Number of Blades 4, Supply Airflow @ 0.000 in SP 4, 578 cfm. This item has been restricted from sale in the following state (s): []