Blower Wheel Type Forward-Curved Includes Drive Package Yes Assembly Unassembled Wheel Diameter 12 3/4 in Airflow @ 0.125 in SP 2 960 cfm Airflow @ 0.250 in SP 2 640 cfm Airflow @ 0.375 in SP 2 230 cfm Airflow @ 0.500 in SP 1 725 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 10.4 sones @ 0.125 in SP and 5 ft 9.9 sones @ 0.250 in SP and 5 ft Wheel Material Steel Housing Material Steel