Centrifugal Downblast Roof Exhaust Fan, Drive Type Belt Drive, Assembly Assembled, Wheel Diameter 13 1/4 in, Base Diameter Not Applicable, Base Length 22 in, Base Width 22 in, Base Shape Square, Nameplate Voltage 115/208-230V AC, Phase 1, Motor Horsepower 1/2 hp, Exhaust Airflow @ 0.000 in SP 2,093 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