Blower Wheel Type Forward-Curved Drive Type Direct Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 10 5/8 in Airflow @ 1.500 in SP 1 848 cfm Airflow @ 2.000 in SP 1 610 cfm Airflow @ 2.500 in SP 1 288 cfm Airflow @ 3.000 in SP Not Applicable Airflow @ 3.500 in SP Not Applicable Airflow @ 4.000 in SP Not Applicable Airflow @ 4.500 in SP Not Applicable Airflow @ 5.000 in SP Not Applicable Airflow @ 6.000 in SP Not Applicable Airflow @ 7.000 in SP Not Applicable