Free air flow (Free Air Delivery) FAD, the compressor is sucking air when the air is expressed in terms of the amount. Inlet temperature of 20 º C compared to the reference, atmospheric pressure, a minute amount of air is absorbed; m3/dk (cubic meters / minute). If you do not express any further, for FAD of the compressor, compressor when the air in the first minute, 20 º C, 1 atmospheric pressure (0 bar effective, 1-1013 bar ... Okay to Look
