When applied to HVAC and light industrial systems, evaporate cooling towers (evaporative condensers) provide lower condensing temperatures and compressor horsepower serving of up to 15 percent compared with traditional systems. In an evaporative condenser, refrigerant vapor is condensed in a coil, which is continually wetted on the outside by a circulating water system. Air is circulated over the coil, causing a small portion of the circulating water to evaporate. The evaporation removes heat from the vapor in the coil, causing it to condense.