Centrifugal Downblast Roof Exhaust Fan Drive Type Belt Drive Assembly Unassembled Mounting Location Roof Wheel Diameter 33 in Base Diameter Not Applicable Base Length 46 in Base Width 46 in Base Shape Square Minimum Airflow 5 937 cfm Maximum Airflow 16 908 cfm Maximum Motor Horsepower 5 hp Minimum Motor Horsepower 1 hp Minimum Motor Speed 415 RPM Maximum Motor Speed 700 RPM Maximum Static Pressure 1 3/4 in wc For High-Static Pressure Applications No