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2. These 10 Standing Air Conditioners Will Help You ... - AOL

   www.aol.com/news/cool-down-smart-c-units...

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3. The best portable air conditioners - AOL

   www.aol.com/news/best-portable-air-conditioners...

   With 14,000 BTUs of cooling power (the most of any single-hose portable air conditioner on this list), this portable AC is designed to cool a room up to 700 square feet in size, De’Longhi says ...

4. Our Editor Tried the Best Air Conditioners on Amazon ... - AOL

   www.aol.com/editor-tried-best-air-conditioners...

   The small but mighty portable air conditioner can hold up to 1.5 liters of water in its reservoir to project cool air for about 12 hours at a time. ... this window air conditioner is most ideal ...

5. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The turn down ratio depends on the system configuration and manufacturer. It modulates from 15 or 25% up to 100% at full capacity with a single inverter from 12 to 100% with a hybrid tandem. This method is the most efficient way to modulate an air conditioner's capacity. It is up to 58% more efficient than a fixed speed system. [citation needed]

6. Heating, ventilation, and air conditioning - Wikipedia

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

   Then the mixture air enters an indoor or outdoor heat exchanger section where the air is to be cooled down, then be guided to the space creating positive air pressure. The percentage of return air made up of fresh air can usually be manipulated by adjusting the opening of this vent. Typical fresh air intake is about 10% of the total supply air.

7. 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 ...