In the United States there are 3 common type of cooling systems are mostly likely use in the United State and they have other but those. 3 types they are used in residential and commercial, Central air conditioning, Packaged, Ductless mini split systems. All three are used in homes and offices throughout the nation to cool up your homes and your office building.

You must know how refrigerants work to understand how an air-conditioning system works. The refrigerant enters the compressor as a low-pressure, superheated gas. The compressor pumps the gas towards the condenser, where it cools and condenses, turning into vapour and then a cool, high-pressure liquid. This process produces hot air, which the condenser (contained in the outside unit) blows away with a fan. The liquid arrives at the metering device, which lowers its pressure and turns it back into a vapour. The vapour enters the evaporator, where it absorbs heat from the space being cooled. This causes the vapour to boil, which turns it back into superheated low-pressure gas. This process produces cool air, which the air condition unit fan blows into the room. The gas enters the compressor, for the cycle to start over.