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  2. Packaged terminal air conditioner - Wikipedia

    en.wikipedia.org/wiki/Packaged_terminal_air...

    Packaged terminal air conditioner installed in a residential apartment. A packaged terminal air conditioner (PTAC) is a type of self-contained heating and air conditioning system intended to be mounted through a wall. [1] The first practical semi-portable air conditioning unit invented by engineers at Chrysler Motors. It entered the market in ...

  3. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons. The high setting is used during extreme weather, and the low setting is used during moderate weather. This type of air conditioner produces a balanced temperature and is in use for a longer period of time.

  4. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Packaged air conditioners (also known as self-contained units) [75] [76] are central systems that integrate into a single housing all the components of a split central system, and deliver air, possibly through ducts, to the spaces to be cooled.

  5. Frigidaire - Wikipedia

    en.wikipedia.org/wiki/Frigidaire

    In addition to manufacturing room air conditioners, Frigidaire also provided the factory air conditioning systems for General Motors (GM) automobiles. From the 1950s through the 1970s, these units developed a reputation for providing powerful air conditioning systems on virtually all GM cars and trucks from the largest Cadillacs to the small ...

  6. Medical Unit, Self-contained, Transportable - Wikipedia

    en.wikipedia.org/wiki/Medical_Unit,_Self...

    Medical Unit, Self-contained, Transportable (MUST) was a type of medical equipment system developed for field hospitals in the United States Army in the late 1950s and early 1960s. The system used inflatable shelters for ward and patient care space, and expandable shelters for operating rooms and other sections.

  7. Chlorofluorocarbon - Wikipedia

    en.wikipedia.org/wiki/Chlorofluorocarbon

    In 1932, Carrier began using R-11 in the worlds first self-contained home air conditioning unit known as the "atmospheric cabinet". As a result of CFCs being largely non-toxic, they quickly became the coolant of choice in large air-conditioning systems.

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