Centrifugal Upblast Roof Exhaust Fan Application Industrial and Commercial Buildings Restaurants Schools Drive Type Belt Drive Wheel Diameter 30 1/2 in Base Diameter Not Applicable Base Length 40 in Base Width 40 in Base Shape Square Maximum Static Pressure 2 in wc Maximum Airflow 11 191 cfm Minimum Airflow 5 940 cfm Maximum Motor Horsepower 5 hp Minimum Motor Horsepower 1/3 hp Maximum Motor Speed 905 RPM Minimum Motor Speed 365 RPM Assembly Unassembled