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2. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Air conditioners, which typically use vapor-compression refrigeration, range in size from small units used in vehicles or single rooms to massive units that can cool large buildings. [6] Air source heat pumps , which can be used for heating as well as cooling , are becoming increasingly common in cooler climates.

3. The Best Window Air Conditioners, According to ... - AOL

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

   Friedrich Chill Premier 10000 BTU Smart Window Air Conditioner CCF10A10A. Best for: Large rooms This model can cool a 400- to 500-square-foot space with ease thanks to its 10,000 BTUs and eight ...

4. The best portable air conditioners - AOL

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

   Best portable air conditioner for large rooms: De'Longhi De’Longhi EX390LVYN 14,000 BTU Portable Air Conditioner. Cooling power: 14,000 BTUs. Room size: Up to 700 square feet. Hose type: Single hose

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

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

   Instead of paying thousands of dollars to install ductwork throughout a home, shopping this split air conditioner can be a worthy investment to cool multiple rooms at a time. It gets stellar ...

6. Heating, ventilation, and air conditioning - Wikipedia

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

   Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.

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 ...