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 6 179 cfm Airflow @ 0.250 in SP 5 934 cfm Airflow @ 0.500 in SP 5 689 cfm Airflow @ 0.750 in SP 5 410 cfm Airflow @ 1.000 in SP 5 106 cfm Airflow @ 1.250 in SP 4 733 cfm Airflow @ 1.500 in SP 4 335 cfm Airflow @ 1.75 in SP 3 872 cfm Airflow @ 2.000 in SP 3 229 cfm Maximum Static Pressure 2 in wc