Air Conditioning

Air Conditioning

An air conditioner (often referred to as AC) is a major or home appliance, system, or mechanism designed to change the air temperature and humidity within an area (used for cooling and sometimes heating depending on the air properties at a given time). The cooling is typically done using a simple refrigeration cycle, but sometimes evaporation is used, commonly for comfort cooling in buildings and motor vehicles. In construction, a complete system of heating, ventilation and air conditioning is referred to as "HVAC".

The basic concept behind air conditioning is known to have been applied in ancient Egypt where reeds hung in windows had water trickling down. The evaporation of water cooled the air blowing through the window, though this process also made the air more humid. In Ancient Rome, water from aqueducts was circulated through the walls of certain houses to cool them down. Other techniques in medieval Persia involved the use of cisterns and wind towers to cool buildings during the hot season. Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1911 by Willis Haviland Carrier. The introduction of residential air conditioning in the 1920s helped start the great migration to the Sunbelt.

Read more about Air ConditioningRefrigeration Cycle, Humidity Control, Energy, Uses, Health Issues

Other articles related to "air, air conditioning":

Liz Constable - Minister in The Barnett Government
... policy which left children with no air-conditioning for new buildings outside the "air cooling zone" established by the state Government and so regularly subject to internal temperatures of heat above 35 degrees in ... Despite the Commonwealth providing the funding for the air-conditioning, the WA State Government, and Constable's department, did not allow schools to install the funded air conditioning in new building ... Constable had said if schools arranged for independent contractors to install air-conditioning within 12 months of construction, it would void the building warranty ...
Sustainable Automotive Air Conditioning
... Sustainable automotive air conditioning is the subject of a debate – nicknamed the Cool War – about the next-generation refrigerant in car air ...
Sustainable Automotive Air Conditioning - Arguments - Arguments Against CO2
... Over a car’s life cycle, however, CO2 air conditioning systems will be more cost-efficient than any currently used or proposed new chemical blends ... non-flammable refrigerant) by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) – the highest safety class possible ... As the charge of CO2 to the air conditioning systems is very small (200-400 g) there is no realistic danger for the passengers, even in case of accidental ...
Air Conditioning, Heating And Refrigeration Institute
... The Air Conditioning, Heating, and Refrigeration Institute (AHRI), formed in 2008 by a merger of the Air-Conditioning and Refrigeration Institute (ARI) and the ...
Salmon Conservation - Past Policy Choices
... The technology for cheap, effective home and commercial air conditioning developed rapidly after World War II ... the indirect effect on salmon of widespread adoption of air conditioning was clear (1) greatly increased demand for electricity and (2) increased overall regional ... Much of the West Coast is hot during summer months, thus air conditioners found a receptive market ...

Famous quotes containing the words conditioning and/or air:

    The climacteric marks the end of apologizing. The chrysalis of conditioning has once for all to break and the female woman finally to emerge.
    Germaine Greer (b. 1939)

    It so happened that, a few weeks later, “Old Ernie” [Ernest Hemingway] himself was using my room in New York as a hide-out from literary columnists and reporters during one of his rare stopover visits between Africa and Key West. On such all-too-rare occasions he lends an air of virility to my dainty apartment which I miss sorely after he has gone and all the furniture has been repaired.
    Robert Benchley (1889–1945)