Blower Wheel Type Forward-Curved Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 22 1/8 in Airflow @ 0.000 in SP Not Applicable Airflow @ 0.100 in SP Not Applicable Airflow @ 0.125 in SP 7 680 cfm Airflow @ 0.250 in SP 7 070 cfm Airflow @ 0.500 in SP 5 500 cfm Airflow @ 0.750 in SP 3 540 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