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 75 cfm, Airflow @ 0.100 in SP 74 cfm, Airflow @ 0.125 in SP 73 cfm, Airflow @ 0.250 in SP 68 cfm, Airflow @ 0.375 in SP 66 cfm, Airflow @ 0.400 in SP 63 cfm, Airflow @ 0.500 in SP 62 cfm, Airflow @ 0.750 in SP 48 cfm, Airflow @ 1.000 in SP 0 cfm, Airflow @ 1.250 in SP Not Applicable, Airflow @ 1.500 in SP Not Applicable