Plenum Fan Wheel Type Backward-Curved Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 22 in Airflow @ 0.000 in SP 5 629 cfm Airflow @ 0.250 in SP 5 361 cfm Airflow @ 0.500 in SP 5 092 cfm Airflow @ 0.750 in SP 4 759 cfm Airflow @ 1.000 in SP 4 377 cfm Airflow @ 1.250 in SP 3 939 cfm Airflow @ 1.500 in SP 3 419 cfm Airflow @ 1.75 in SP 2 184 cfm Maximum Static Pressure 1 1/2 in wc Maximum Inlet Air Temperature 104 Degrees F