Blower Wheel Type Radial Drive Type Direct Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 9 in Airflow @ 0.000 in SP 909 cfm Airflow @ 0.250 in SP 788 cfm Airflow @ 0.500 in SP 655 cfm Airflow @ 0.750 in SP 462 cfm Airflow @ 1.000 in SP Not Applicable Airflow @ 1.250 in SP Not Applicable Airflow @ 1.500 in SP Not Applicable Airflow @ 2.000 in SP Not Applicable Airflow @ 2.500 in SP Not Applicable Airflow @ 3.000 in SP Not Applicable