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air conditioning wikipedia the free encyclopedia

air conditioning wikipedia the free encyclopedia


Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering

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Air doorWikipedia

The American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a

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