Centrifugal Downblast Roof Exhaust Fan Drive Type Belt Drive Assembly Unassembled Mounting Location Roof Wheel Diameter 26 in Base Diameter Not Applicable Base Length 42 in Base Width 42 in Base Shape Square Minimum Airflow 2 322 cfm Maximum Airflow 10 784 cfm Maximum Motor Horsepower 3 hp Minimum Motor Horsepower 1/2 hp Minimum Motor Speed 465 RPM Maximum Motor Speed 835 RPM Maximum Static Pressure 2 in wc For High-Static Pressure Applications No