Centrifugal Downblast Roof Exhaust Fan Drive Type Direct Drive Assembly Assembled Wheel Diameter 18 1/2 in Base Diameter Not Applicable Base Length 30 in Base Width 30 in Base Shape Square Nameplate Voltage 208-230V AC Phase 1 Motor Horsepower 1 hp Exhaust Airflow @ 0.000 in SP 3 150 cfm For High-Static Pressure Applications No High-Efficiency Motor Yes For Air Type Clean Air Includes Drive Package Yes Includes Motor Yes Mounting Location Roof Maximum Static Pressure 7/8 in wc