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

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

   This Black & Decker portable air conditioner is best suited to small-room cooling, perhaps even supplementing a central-air system in a tall condominium or townhouse that has an uncomfortably warm ...

3. We Did the Research and *These* Are the Best Air Conditioner ...

   www.aol.com/did-research-best-air-conditioner...

   THE REVIEWS: “This is a very basic air conditioner, good for a small room (used in about 10x12 ft. room),” one shopper notes. “The controls are all knobs, with no temperature settings.

4. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]

5. Central vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Central_vacuum_cleaner

   In fixed-installation central vacuum cleaners, the cleaned air may be exhausted directly outside without the need for further filtration. A well-designed cyclonic separation system does not lose suction power due to airflow restriction until the collection vessel is almost full. This is in marked contrast to filter bag systems, which gradually ...

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. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...