Two numbers size a booth blower
A paint booth is defined by two figures — required airflow and static pressure — and a blower chosen on airflow alone will disappoint as soon as filters load. The static-pressure margin is what holds face velocity in spec through the filter's life. The recommendation is to specify both and select a high-pressure centrifugal that sits comfortably above the loaded-filter static, so booth performance stays flat between changes rather than sagging toward the end of each cycle.