Not being used for it's intended purpose exactly. Using as the heat exchanger for a fan forced compressed air aftercooler. It has performed flawlessly in this role. No noticeable drop in air pressure or CFM from my 2 stage 60 gallon Quincy. The build quality is good and the price and size was perfect. Even at 120 degrees input I get ambient temperature air coming out. Placed above the air compressor for good condensed water flow to the separator or tank and added benefit of my fans blow down on to the pump and motor of the compressor to help cool them as well.