Plenum Fan Wheel Type Backward-Curved Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 15 in Airflow @ 0.000 in SP 2 676 cfm Airflow @ 0.250 in SP 2 553 cfm Airflow @ 0.500 in SP 2 431 cfm Airflow @ 0.750 in SP 2 282 cfm Airflow @ 1.000 in SP 2 116 cfm Airflow @ 1.250 in SP 1 919 cfm Airflow @ 1.500 in SP 1 693 cfm Maximum Static Pressure 1 1/2 in wc Maximum Inlet Air Temperature 104 Degrees F Shaft Diameter 1 in Bearing Type Ball