The Full form of HVAC is Heating Ventilation and Air Conditioning. It is a technology used to regulate room temperature, humidity, and Air flow in a particular given area. Its usage is to provide thermal comfort and acceptable indoor air quality. This technology is based on the inventions of some famous scientists like Michael Faraday, Reuben Trane, Nikolay Lvov, James Joule, Willis Carrier, William Rankine, Sadi Carnot, and many others. It works on the principle of thermodynamics, fluid mechanics, and heat transfer.

These systems can be used for both domestic and commercial purposes. It is comprised of central air conditioning, heating, and ventilation system. The main components of the Heating Ventilation and Air Conditioning systems are furnace, heat exchanger, evaporator coil, condensing unit, refrigerant lines, thermostat, ducts, and vents. HVAC technology is used to create a comfortable and luxurious environment indoor or in vehicles. Its main aim is to provide proper ventilation, thermal comfort, and to remove unpleasant smell and unnecessary moisture within reasonable installation, operational, and maintenance costs.

It is also very important in the design of medium to large industrial and office building. Some of the main examples of the use of this technology are: Business Offices, Restaurants, Shopping Malls, Colleges, Hotels, Vehicles, and Schools etc.