Blower Wheel Type Forward-Curved Includes Drive Package Yes Assembly Unassembled Wheel Diameter 11 1/2 in Airflow @ 0.125 in SP 2 515 cfm Airflow @ 0.250 in SP 2 400 cfm Airflow @ 0.375 in SP 2 260 cfm Airflow @ 0.500 in SP 2 080 cfm Airflow @ 0.750 in SP 850 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 14.1 sones @ 0.250 in SP and 5 ft 14.7 sones @ 0.125 in SP and 5 ft Wheel Material Steel