Downblast Exhauster Drive Type Belt Drive Assembly Unassembled Mounting Location Roof and Wall Wheel Diameter 21 1/4 in Base Diameter Not Applicable Base Length 33 1/8 in Base Width 33.1 in Base Shape Square Minimum Airflow 2 000 cfm Maximum Airflow 6 500 cfm Maximum Motor Horsepower 3 hp Minimum Motor Horsepower 1/2 hp Minimum Motor Speed 1 300 RPM Maximum Motor Speed 1 300 RPM Maximum Static Pressure 2 1/4 in wc For High-Static Pressure Applications Yes Standards cETLus