Centrifugal Downblast Roof Exhaust Fan Drive Type Belt Drive Assembly Assembled Wheel Diameter 30 1/2 in Base Diameter Not Applicable Base Length 42 in Base Width 42 in Base Shape Square Nameplate Voltage 208-230/460V AC Phase 3 Motor Horsepower 3 hp Exhaust Airflow @ 0.000 in SP 12 311 cfm For High-Static Pressure Applications No High-Efficiency Motor No For Air Type Clean Air Includes Drive Package Yes Includes Motor Yes Mounting Location Roof