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2. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   All modern air conditioning systems, even small window package units, are equipped with internal air filters. [citation needed] These are generally of a lightweight gauze-like material, and must be replaced or washed as conditions warrant. For example, a building in a high dust environment, or a home with furry pets, will need to have the ...

3. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Innovations in the latter half of the 20th century allowed more ubiquitous air conditioner use. In 1945, Robert Sherman of Lynn, Massachusetts, invented a portable, in-window air conditioner that cooled, heated, humidified, dehumidified, and filtered the air. [37] The first inverter air conditioners were released in 1980–1981. [38] [39]

4. Fire escape - Wikipedia

   en.wikipedia.org/wiki/Fire_escape

   The installation of window air conditioners in individual apartment units with fire escape-facing windows, often installed against code or local ordinance by residents, [6] which require the unit to be affixed to the window sash, also make a fire escape nearly useless in the summer months; the bulk and weight of an air conditioner unit placed ...

5. R-410A - Wikipedia

   en.wikipedia.org/wiki/R-410A

   R-410A is a refrigerant fluid used in air conditioning and heat pump applications. It is a zeotropic but near-azeotropic mixture of difluoromethane (CH 2 F 2, called R-32) and pentafluoroethane (CHF 2 CF 3, called R-125). R-410A is sold under the trademarked names AZ-20, EcoFluor R410, Forane 410A, Genetron R410A, Puron, and Suva 410A.

6. Central vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Central_vacuum_cleaner

   The original "Vroom" system, which is still available, uses suction to operate a cabinet-mounted hose reel with a 24 ft (7.3 m) hose, rather than storing the hose within the wall piping. A modular vacuum hose called "QuickClick" is available in 10/15/20 foot (3/4.5/6 m) lengths, allowing a custom-length hose to be quickly set up or taken apart ...

7. Evaporative cooler - Wikipedia

   en.wikipedia.org/wiki/Evaporative_cooler

   An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles.