Air conditioner

The external section of a generic single-room air conditioning unit. For ease of installation, units are typically fitted into windows or, as in this photograph, a hole in the wall
The internal section of the same unit. The front panel swings down to reveal the controls
Note:the term "air conditioning" refers to any form of "Heating, ventilation and air-conditioning". This article deals specifically with units used as part of a cooling system.

An air conditioner (AC) is a system or a machine that treats air in a defined, usually enclosed area via a refrigeration cycle in which warm air is removed and replaced with cooler air.

In construction, a complete system of heating, ventilation, and air conditioning is called HVAC. Whenever Refrigeration is added it is called HVACR. Whether in homes, offices, or vehicles, its purpose is to provide comfort by altering the properties of the air, usually by cooling the air inside. The main function of an air conditioner is to change adverse temperatures.


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