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 42 in, Base Width 42 in, Base Shape Square, Maximum Static Pressure 2 in wc, Maximum Airflow 14,727 cfm, Minimum Airflow 4,464 cfm, Maximum Motor Horsepower 5 hp, Minimum Motor Horsepower 1/3 hp, Maximum Motor Speed 905 RPM, Minimum Motor Speed 365 RPM, Assembly Unassembled