Air conditioning is the process of treating air in an internal environment to establish and maintain required standards of temperature, humidity, cleanliness, and motion. This is how each of these conditions is controlled:
- Temperature : Air temperature is controlled by heating or cooling the air. Cooling technically means the removal of heat, in contrast to heating, the addition of heat.
- Humidity : Air humidity, the water vapour content of the air, is controlled by adding (humidification) or removing (dehumidification) water vapour from the air.
- Cleanliness : Air cleanliness or air quality is controlled by either filtration, the removal of undesirable contaminants using filters or other devices or by ventilation, the introduction ...