Blower, Wheel Type Forward-Curved, Drive Type Belt Drive, Includes Drive Package No, Assembly Unassembled, Wheel Diameter 18 1/2 in, Minimum Airflow 9,500 cfm, Maximum Airflow 12,500 cfm, Maximum Static Pressure 4 in wc, Maximum Inlet Air Temperature 250 Degrees F, Shaft Diameter 1 in, Bearing Type Ball, Wheel Material Steel, Housing Material Steel, Wheel Width 18 1/2 in, Number of Inlets 2, Inlet Diameter 15 1/8 in, Outlet Shape Rectangular, Outlet Height 18 7/8 in, Outlet Width 21 7/8 in