Air-conditioning also popularly known as aircon, a/c or ac is a procedure wherein the properties of air are transformed and modified to lower the humidity and temperature in a particular area and bring it to a more favourable condition, with the aim of spreading cold air in the area occupied by people in order to enhance comfort levels. On a general note, any form of technology involving cooling, air modification, ventilation, air movement etc. that involves an alteration of the condition of air is referred to as air conditioning.

Considered to be one of the major home appliances, system or mechanisms, an air conditioner uses the same technology as that of a simple refrigeration cycle, including the addition of evaporation, especially for motor vehicles and cooling air in large buildings.

The first modern electrical air-conditioning unit was invented in 1902, in Buffalo, New York by Willis Carrier. Carrier began to experiment with the process of air-conditioning as a means of solving an application trouble for a publishing and printing company in Brooklyn and thus designed and built the first working air-conditioner in 1902. The first air-conditioner not only helped in controlling the temperature but also restrained the humidity levels that further helped in enhancing the manufacturing process at the printing plant. Over a period of time, Carrier’s technology was used in various work environments to help enhance workplace productivity. Eventually the need for residential air conditioners also began to rise as demand boomed substantially in the 1950s.

Air conditioners these days are used not only in construction buildings but also in major types of transportation including spacecraft, aircraft, ships, trains, and various modes of land vehicles.

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