Blower Wheel Type Forward-Curved Includes Drive Package Yes Assembly Unassembled Wheel Diameter 11 1/2 in Airflow @ 0.125 in SP 2 190 cfm Airflow @ 0.250 in SP 2 045 cfm Airflow @ 0.375 in SP 1 855 cfm Airflow @ 0.500 in SP 1 495 cfm Maximum Static Pressure 1/2 in wc Maximum Inlet Air Temperature 140 Degrees F Shaft Diameter 3/4 in Bearing Type Ball Sound Level 10.6 sones @ 0.250 in SP and 5 ft 11.2 sones @ 0.125 in SP and 5 ft Wheel Material Steel Housing Material Steel