Direct Dive Utility Blower Wheel Type Backward-Inclined Drive Type Direct Drive Includes Drive Package Yes Assembly Assembled Wheel Diameter 16 1/2 in Airflow @ 0.000 in SP 3 700 cfm Airflow @ 0.125 in SP 3 600 cfm Airflow @ 0.250 in SP 3 500 cfm Airflow @ 0.500 in SP 3 318 cfm Airflow @ 0.750 in SP 3 046 cfm Airflow @ 1.000 in SP 2 758 cfm Airflow @ 1.250 in SP 2 350 cfm Airflow @ 1.500 in SP 2 024 cfm Airflow @ 2.000 in SP Not Applicable Airflow @ 2.500 in SP Not Applicable