The KW25 is a reciprocator based on the principle of water evaporation. Mains water is sprayed onto its pipes. This creates evaporative cooling. KW25 provides the necessary cooling energy without a refrigerating machine. It is exactly matched to the requirements of Rio-Therm, Cool-Top and Cool-Rack. Once installed, it is thrifty enough to generate 25 units of cold for each unit of electricity.