Centrifugal Downblast Roof Exhaust Fan Drive Type Direct Drive Assembly Assembled Wheel Diameter 16 3/4 in Base Diameter Not Applicable Base Length 26 in Base Width 26 in Base Shape Square Nameplate Voltage 115V AC Phase 1 Motor Horsepower 1/3 hp Exhaust Airflow @ 0.000 in SP 1 813 cfm For High-Static Pressure Applications Yes High-Efficiency Motor No For Air Type Clean Air Includes Drive Package Yes Includes Motor Yes Mounting Location Roof Maximum Static Pressure 1 in wc