For our compressor chillers, we offer the possibility of using the cooling potential of the outside air, the free-cooling functionality, where the medium is cooled without the use of a compressor during periods of low outside air temperature. Due to the appropriate design of the device and additional exchangers, both the functionality of the compressor chiller and free-cooling are carried out by one device, within one housing, the dimensions of which do not differ from a typical compressor cooler.