Air-cooled evaporators are special heat exchangers for cooling the air mass in chillers or cold rooms. They differ in power, construction, and use of refrigerants. Even the capacity of the same model can vary depending on the boiling point of the refrigerant and the boiling delta (the difference between the boiling point and the temperature in the refrigerating chamber), the used refrigerant, the speed of the fans.http://www.jinhaocooler.com/evaporator/cooler-evaporator/