In-Line Duct Blower Wheel Type Backward-Inclined Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 11 in Airflow @ 0.000 in SP 952 cfm Airflow @ 0.125 in SP 924 cfm Airflow @ 0.250 in SP 897 cfm Airflow @ 0.375 in SP 870 cfm Airflow @ 0.500 in SP 842 cfm Airflow @ 0.750 in SP 784 cfm Airflow @ 1.000 in SP 716 cfm Airflow @ 1.250 in SP 643 cfm Airflow @ 1.500 in SP 563 cfm Maximum Static Pressure 1 1/2 in wc