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 1 274 cfm Airflow @ 0.125 in SP 1 236 cfm Airflow @ 0.250 in SP 1 199 cfm Airflow @ 0.375 in SP 1 157 cfm Airflow @ 0.500 in SP 1 114 cfm Airflow @ 0.750 in SP 1 021 cfm Airflow @ 1.000 in SP 913 cfm Airflow @ 1.250 in SP 784 cfm Airflow @ 1.500 in SP 632 cfm Maximum Static Pressure 1 1/2 in wc