Blower Wheel Type Forward-Curved Includes Drive Package Yes Assembly Unassembled Wheel Diameter 12 3/4 in Airflow @ 0.125 in SP 2 625 cfm Airflow @ 0.250 in SP 2 235 cfm Airflow @ 0.375 in SP 1 740 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 7.7 sones @ 0.250 in SP and 5 ft 8.4 sones @ 0.125 in SP and 5 ft Wheel Material Steel Housing Material Steel Number of Inlets 2