Centrifugal Downblast Roof Exhaust Fan Drive Type Direct Drive Assembly Assembled Wheel Diameter 11 in Base Diameter Not Applicable Base Length 22 in Base Width 22 in Base Shape Square Nameplate Voltage 115V AC Phase 1 Motor Horsepower 1/8 hp Exhaust Airflow @ 0.000 in SP 431 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 Maximum Static Pressure 1/4 in wc