Air Conditioning (A/C)

A unit that cools the air temperature by removing the heated air and replacing it with air cooled by the unit. A compressor compresses a refrigerant gas (e.g. Freon) so that it heats up. This heated gas then runs through an expansion valve, cooling it down. This colder gas passes through coils, absorbing the heat from air that has been extracted from the building, thus cooling it down. This cool air is then blown back into the building.