Thursday, April 15, 2010

Air conditioning is the cooling of indoor air for comfort. In a better sense, the term can refer to any form of cooling, heating, ventilation, or disinfection that improves the condition of air. An air conditioner is an appliance, system, or machine designed to stabilise the air temperature and humidity within an area, typically using a refrigeration cycle but sometimes using evaporation, commonly for comfort cooling in buildings and motor vehicles.
The concept of air conditioning is known to have been applied in Ancient Rome, where aqueduct water was circulated through the walls of certain houses to cool them. Similar 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 1902 by Willis Haviland Carrier.

-Keith 3e3 23

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