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2. Heating, ventilation, and air conditioning - Wikipedia

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

   Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

3. 6 of the Most Common Home Renovations — Are They Worth It ...

   www.aol.com/finance/6-most-common-home...

   Heating and Air Conditioning Upgrades. There’s no getting around replacing heating, ventilation and air conditioning (HVAC) equipment once it’s broken down and is beyond repair. But replacing ...

4. Condenser (heat transfer) - Wikipedia

   en.wikipedia.org/wiki/Condenser_(heat_transfer)

   A condenser is designed to transfer heat from a working fluid (e.g. water in a steam power plant) to a secondary fluid or the surrounding air. The condenser relies on the efficient heat transfer that occurs during phase changes, in this case during the condensation of a vapor into a liquid. The vapor typically enters the condenser at a ...

5. 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]

6. Should You Close Vents In Unused Rooms During Winter ... - AOL

   www.aol.com/lifestyle/close-vents-unused-rooms...

   As the return removes the cool or hot air, Martin says, the supply vents replace this air with the opposite of what it is removing. In most homes, the furnace (forced air) and air conditioner ...

7. Crankcase heater - Wikipedia

   en.wikipedia.org/wiki/Crankcase_heater

   Some air conditioning equipment manufacturers install crankcase heaters either in the compressor (insertion type), or mount them externally around the base of the compressor (bellyband type). The two wires of the heater are wired directly to the input side of the contact from the main power supply, and power is always supplied to the heater.