These coaxial heat exchangers are suitable for use as condensers or "chiller" evaporators. The refrigerant circuit is run through the outer tube and the water (sea water or glycol) is run through the 90-10 copper-nickel inner tube. 012-1005 is used with a Danfoss Compressor in one of our water-cooled DIY kits. For capacity guidance, photos and additional information click on the part number.