In-Line Duct Blower Wheel Type Backward-Inclined Includes Drive Package Yes Assembly Unassembled Wheel Diameter 14 in Airflow @ 0.000 in SP 4 060 cfm Airflow @ 0.125 in SP 4 009 cfm Airflow @ 0.250 in SP 3 958 cfm Airflow @ 0.375 in SP 3 907 cfm Airflow @ 0.500 in SP 3 856 cfm Airflow @ 0.750 in SP 3 741 cfm Airflow @ 1.000 in SP 3 622 cfm Airflow @ 1.250 in SP 3 494 cfm Airflow @ 1.500 in SP 3 365 cfm Airflow @ 2.000 in SP 3 078 cfm Airflow @ 2.500 in SP 2 627 cfm