Leakage costs A typical fully loaded air compressor running at about 100 psi will consume between 17 and 22 kW per 100 cfm. At 10 cents per kWh, this would mean the cost of the compressed air would be about $1.70 to $2.20 per hour of operation for every 100 cfm of constant flow.Click to see full answer. In this regard, how much does compressed air cost?Compressed air cost $0.30 per 1000 standard cubic feet per minute (scfm) including investment and maintenance costs.Subsequently, question is, how do you stop a compressed air leak? Stopping leaks can be as simple as tightening a connection or as complex as replacing faulty equipment such as couplings, fittings, pipe sections, hoses, joints, drains, and traps. In many cases leaks are caused by bad or improperly applied thread sealant. how do you calculate air leakage? Calculate Air Leakage Rates Install an accurate absolute pressure vacuum gauge, measuring in Torr (mm Hg absolute). Calculate the total volume of the vacuum system in cubic feet. Pump down the system below the minimum required operating pressure. While the vacuum pump is running, close the inlet valve. Stop the vacuum pump. Why is my air compressor leaking?If you feel any air leak around or beside the pressure switch it’s a pretty good bet that your tank check valve is leaking. Unplug the compressor, drain all the air from the tank, remove and clean or replace the tank check valve. If air flows both ways, a new check valve would be a good investment in compressor repair.