Blower Wheel Type Forward-Curved Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 12 3/4 in Airflow @ 0.000 in SP Not Applicable Airflow @ 0.100 in SP Not Applicable Airflow @ 0.125 in SP 2 350 cfm Airflow @ 0.250 in SP 2 240 cfm Airflow @ 0.500 in SP 1 950 cfm Airflow @ 0.750 in SP 1 570 cfm Airflow @ 1.000 in SP 1 110 cfm Airflow @ 1.250 in SP Not Applicable Airflow @ 1.500 in SP Not Applicable Airflow @ 2.000 in SP Not Applicable