High Pressure Blower Wheel Type Radial Wheel Diameter 18 1/2 in Airflow @ 1.000 in SP 3 755 cfm Airflow @ 2.000 in SP 4 138 cfm Airflow @ 3.000 in SP 4 104 cfm Airflow @ 4.000 in SP 4 067 cfm Airflow @ 5.000 in SP 4 029 cfm Airflow @ 6.000 in SP 3 987 cfm Airflow @ 7.000 in SP 3 942 cfm Airflow @ 8.000 in SP 3 891 cfm Airflow @ 9.000 in SP 3 832 cfm Airflow @ 11.00 in SP 3 620 cfm