The volumetric flow rate refers to the amount of air taken in by the compressor in a unit of time under standard conditions, and it is expressed in units of cubic meters per minute (m3/min). In smaller units, it is represented as N m3/min, while in cubic feet per minute (CFM), 1 CFM is equal to 0.02832 m3/min, or 1 m3/min is equal to 35.311 CFM.