Blower Wheel Type Forward-Curved Drive Type Belt Drive Includes Drive Package No Assembly Unassembled Wheel Diameter 12 3/4 in Minimum Airflow 1 800 cfm Maximum Airflow 3 600 cfm Maximum Static Pressure 2 1/2 in wc Maximum Inlet Air Temperature 140 Degrees F Shaft Diameter 3/4 in Bearing Type Ball Wheel Material Steel Housing Material Steel Number of Inlets 2 Inlet Diameter 10 3/8 in Outlet Duct Connection Height 13 3/8 in Outlet Duct Connection Width 15 5/8 in