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Air conditioning Wikipedia.
Its invention was motivated by the small size of modern Japanese homes, and the large size of traditional ducted central split systems. 57 58 59 Multi-zone multi-split systems provide extended cooling and heating capacity up to 60000, BTU's' to multiple rooms or indoor units simultaneously. Large multi-zone systems are known as VRF Variable refrigerant flow systems and are often used in commercial buildings. Multi-zone ductless systems were invented by Daikin in 1973 and VRF systems were also invented by Daikin in 1982.
Air Conditioning Department of Energy.
Refrigerators use energy usually electricity to transfer heat from the cool interior of the refrigerator to the relatively warm surroundings of your home; likewise, an air conditioner uses energy to transfer heat from the interior of your home to the relatively warm outside environment.
Air conditioner Simple English Wikipedia, the free encyclopedia.
Health implications change change source. Air conditioning has as much influence on human health as any generic heating system.Poorly maintained air-conditioning systems especially large, centralized systems can occasionally promote the growth and spread of microorganisms such as Legionella pneumophila, the infectious agent responsible for Legionnaire's' disease.
How Air Conditioning Works YouTube.

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