Centrifugal Downblast Roof Exhaust Fan Drive Type Belt 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 208-230/460V AC Phase 3 Motor Horsepower 1 hp Exhaust Airflow @ 0.000 in SP 4 608 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