Which of the following units is used to determined the volume of air that is compressed at the site of the compressor?

Actual Cubic Feet per Minute (ACFM) is used to express the volumetric flow based on defined pressure and temperature conditions at the location in the system where the measurement is being taken. ACFM could reflect the flow at the inlet to a compressor. ACFM could reflect the flow at the discharge of an air booster. ACFM could reflect the flow at the point of use of plastic bottle blowing equipment. It all depends on what is defined. It is important not to confuse ACFM with atmospheric conditions at the site, although since this could be part of the “system”, ACFM and atmospheric conditions could be same.