In-Line Duct Blower Wheel Type Backward-Inclined Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 18 in Airflow @ 0.000 in SP 5 357 cfm Airflow @ 0.125 in SP 5 242 cfm Airflow @ 0.250 in SP 5 128 cfm Airflow @ 0.375 in SP 5 003 cfm Airflow @ 0.500 in SP 4 878 cfm Airflow @ 0.750 in SP 4 610 cfm Airflow @ 1.000 in SP 4 281 cfm Airflow @ 1.250 in SP 3 884 cfm Airflow @ 1.500 in SP 3 332 cfm Maximum Inlet Air Temperature 160 Degrees F