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 832 cfm Airflow @ 0.125 in SP 799 cfm Airflow @ 0.250 in SP 769 cfm Airflow @ 0.375 in SP 737 cfm Airflow @ 0.500 in SP 704 cfm Airflow @ 0.750 in SP 630 cfm Airflow @ 1.000 in SP 545 cfm Airflow @ 1.250 in SP 452 cfm Airflow @ 1.500 in SP 269 cfm Maximum Static Pressure 1 1/2 in wc