OEM Blower, Wheel Type Forward-Curved, Drive Type Direct Drive, Includes Drive Package Not Applicable, Assembly Assembled, Wheel Diameter 3 7/8 in, Airflow @ 0.000 in SP 151 cfm, Airflow @ 0.100 in SP 140 cfm, Airflow @ 0.125 in SP Not Applicable, Airflow @ 0.250 in SP 134.4 cfm, Airflow @ 0.375 in SP Not Applicable, Airflow @ 0.400 in SP 120 cfm, Airflow @ 0.500 in SP 110 cfm, Airflow @ 0.750 in SP Not Applicable, Airflow @ 1.000 in SP Not Applicable, Airflow @ 1.250 in SP Not Applicable