Blower Wheel Type Forward-Curved Drive Type Belt Drive Includes Drive Package No Assembly Unassembled Wheel Diameter 15 1/2 in Minimum Airflow 3 400 cfm Maximum Airflow 5 700 cfm Maximum Static Pressure 2 1/2 in wc Maximum Inlet Air Temperature 140 Degrees F Shaft Diameter 1 in Bearing Type Ball Wheel Material Steel Housing Material Steel Number of Inlets 2 Inlet Diameter 12 1/2 in Outlet Duct Connection Height 15 7/8 in Outlet Duct Connection Width 18 5/8 in