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2. Tested and Approved: The Best Air Conditioners for Staving ...

   www.aol.com/lifestyle/best-air-conditioners...

   (Pro tip: It’s best to remove the unit in the fall, clean it, and store it indoors for the longevity of your a/c.) Window air conditioners are heavy, weighing anywhere from 50 to 80 pounds, so ...

3. The 20 best Walmart deals this week: Bedding, beauty ... - AOL

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   Midea 5,000 BTU Mechanical Window Air Conditioner. ... This small unit packs a big bunch, especially as a secondary AC to keep back rooms cool and crisp. It's simple to use, too, with two ...

4. The 6 best-looking window air conditioners that look like decor

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   If you're searching for the best-looking window air conditioner for a small room like a cozy bedroom or a tiny living room, 8,000 BTUs is the power sweet spot, and this Frigidaire Air Conditioner ...

5. 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]

6. 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 ...

7. Radiant heating and cooling - Wikipedia

   en.wikipedia.org/wiki/Radiant_heating_and_cooling

   Passive daytime radiative cooling uses a material that fluoresces in the infrared atmospheric window, a frequency range where the atmosphere is unusually transparent, so that the energy goes straight out to space. This can cool the heat-fluorescent object to below ambient air temperature, even in full sun. [14] [15] [16]