Centrifugal Upblast Roof Exhaust Fan Application Industrial and Commercial Buildings Restaurants Schools Drive Type Belt Drive Wheel Diameter 12 1/2 in Base Diameter Not Applicable Base Length 19 in Base Width 19 in Base Shape Square Maximum Static Pressure 1 1/2 in wc Maximum Airflow 2 037 cfm Minimum Airflow 968 cfm Maximum Motor Horsepower 1/2 hp Minimum Motor Horsepower 1/4 hp Maximum Motor Speed 1 545 RPM Minimum Motor Speed 1 410 RPM Assembly Unassembled