Blower, Wheel Type Forward-Curved, Includes Drive Package Yes, Assembly Unassembled, Wheel Diameter 10 1/4 in, Airflow @ 0.125 in SP 1, 385 cfm, Airflow @ 0.250 in SP 1, 225 cfm, Airflow @ 0.375 in SP 825 cfm, Maximum Static Pressure 1/4 in wc, Maximum Inlet Air Temperature 140 Degrees F, Shaft Diameter 3/4 in, Bearing Type Ball, Sound Level 4.7 sones @ 0.250 in SP and 5 ft, 5.2 sones @ 0.125 in SP and 5 ft, Wheel Material Steel, Housing Material Steel, Number of Inlets 2