Blower, Wheel Type Forward-Curved, Drive Type Belt Drive, Includes Drive Package Yes, Assembly Unassembled, Wheel Diameter 17 3/4 in, Airflow @ 0.000 in SP Not Applicable, Airflow @ 0.100 in SP Not Applicable, Airflow @ 0.125 in SP 5, 180 cfm, Airflow @ 0.250 in SP 4, 800 cfm, Airflow @ 0.500 in SP 3, 810 cfm, Airflow @ 0.750 in SP 1, 050 cfm, Airflow @ 1.000 in SP Not Applicable, Airflow @ 1.250 in SP Not Applicable, Airflow @ 1.500 in SP Not Applicable, Airflow @ 2.000 in SP Not Applicable