Free air flow (Free Air Delivery) FAD, the air compressor when expressed in terms of the amount of air that is absorbed. Inlet temperature of 20 º C according to the reference, atmospheric pressure, the amount of air is absorbed in 1 minute; m3/min (cubic meters / minute). Further there is not an expression, for FAD of the compressor, the compressor when the air in 1 minute, 20 º C, 1 atmosphere pressure (0 bar effective, 1-1013 bar ... Okay to Look