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Air-Conditioning Systems

An air-conditioning or HVAC&R system consists of components and equipment arranged in sequentialorder to heat or cool, humidify or dehumidify, clean and purify, attenuate objectionable equipment noise,transport the conditioned outdoor air and recirculate air to the conditioned space, and control and maintainan indoor or enclosed environment at optimum energy use.

The types of buildings which the air-conditioning system serves can be classified as:

• Institutional buildings, such as hospitals and nursing homes

• Commercial buildings, such as offices, stores, and shopping centers

• Residential buildings, including single-family and multifamily low-rise buildings of three or fewerstories above grade

• Manufacturing buildings, which manufacture and store products

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