Blower Wheel Type Forward-Curved Drive Type Direct Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 7 3/4 in Airflow @ 0.000 in SP 985 cfm Airflow @ 0.125 in SP 920 cfm Airflow @ 0.250 in SP 870 cfm Airflow @ 0.375 in SP 820 cfm Airflow @ 0.500 in SP 765 cfm Airflow @ 0.750 in SP 655 cfm Airflow @ 1.000 in SP 510 cfm Airflow @ 1.250 in SP 360 cfm Airflow @ 1.500 in SP Not Applicable Airflow @ 2.000 in SP Not Applicable Airflow @ 2.500 in SP Not Applicable