Centrifugal Upblast Roof Exhaust Fan, Application Industrial and Commercial Buildings, Restaurants, Schools, Drive Type Belt Drive, Wheel Diameter 24 1/2 in, Base Diameter Not Applicable, Base Length 34 in, Base Width 34 in, Base Shape Square, Maximum Static Pressure 2 3/4 in wc, Maximum Airflow 6,895 cfm, Minimum Airflow 1,940 cfm, Maximum Motor Horsepower 3 hp, Minimum Motor Horsepower 1/2 hp, Maximum Motor Speed 1,240 RPM, Minimum Motor Speed 680 RPM, Assembly Unassembled