Blower, Wheel Type Forward-Curved, Includes Drive Package Yes, Assembly Unassembled, Wheel Diameter 10 1/4 in, Airflow @ 0.125 in SP 2, 115 cfm, Airflow @ 0.250 in SP 2, 035 cfm, Airflow @ 0.375 in SP 1, 945 cfm, Airflow @ 0.500 in SP 1, 835 cfm, Airflow @ 0.750 in SP 1, 400 cfm, Maximum Static Pressure 3/4 in wc, Maximum Inlet Air Temperature 140 Degrees F, Shaft Diameter 3/4 in, Bearing Type Ball, Sound Level 11.3 sones @ 0.250 in SP and 5 ft, 11.7 sones @ 0.125 in SP and 5 ft, Wheel Material Steel