Heating, ventilation, and air conditioning systems regulate temperature, humidity, and indoor air quality in vehicles and buildings. They are designed to provide thermal comfort and to control airborn
Diagram showing main components of an HVAC system
Rooftop HVAC unit with view of fresh-air intake vent
Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space.
The control circuit in a household HVAC installation. The wires connecting to the blue terminal block on the upper-right of the board lead to the thermostat. The fan enclosure is directly behind the board, and the filters can be seen at the top. The safety interlock switch is at the bottom left. In the lower middle is the capacitor.
Air conditioning
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Air conditioning, often abbreviated as A/C or air con, is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and, in some cases, controlling the hum
Heating, ventilation, and air conditioning
…are sensitive to environmental factors. In warm or humid climates, maintaining thermal comfort solely via natural ventilation might not be possible. Air conditioning systems are used, either as backups or supplements. Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers…
An array of air conditioner condenser units outside a commercial office building
The István Röck factory exhibits a small home refrigerator, an air cooling device for large rooms, and a large industrial refrigerator (in the background) at the 1896 National Millennium Exhibition in Budapest
Willis Carrier, who is credited with building the first modern electrical air conditioning unit
The infrared transmitting LED on the remote