Air conditioners alter the condition of air by removing heat or humidity to deliver a more comfortable environment. They typically distribute conditioned air to an occupied space to improve comfort and air quality.
Cooling is typically achieved via a refrigeration cycle, although there are other methods such as evaporation or free cooling.
They come in many types, including split systems, window units, ducted systems, multi split systems, portable units, and packaged systems.
Air conditioning can also sometimes be referred to as HVAC, which stands for Heating, Ventilation, and Air Conditioning.