The answer to 'what does air conditioner do' is an air conditioner is a device that cools and dehumidifies the air in a home or building. It works by removing heat and moisture from the indoor air and transferring it outside, leaving the indoor air cooler and drier. Air conditioners use refrigeration technology to absorb heat from the indoor air and expel it outdoors, using a compressor, condenser, and evaporator coil to circulate a refrigerant that facilitates this heat transfer process.
In addition to cooling the air, air conditioners also help to remove excess humidity, improving indoor comfort and air quality. They are an essential appliance for maintaining a comfortable indoor environment, especially during hot and humid weather conditions.