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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. 5 things you should (and should not) do to make your AC unit ...

   www.aol.com/news/5-things-not-ac-unit-140622695.html

   5 expert tips for making your air conditioning unit run better. Here’s what Smith recommends: 1. Annual maintenance: “Have a professional come check the controls to make sure the electricity ...

4. Should You Cover Your AC Unit In The Winter? Experts Explain

   www.aol.com/cover-ac-unit-winter-experts...

   Here's what they had to say about whether or not you should cover your ac unit in the winter, and how to properly maintain your system until you need it again. ... there is a time you can ...

5. AOL.com - AOL Help

   help.aol.com/products/aol

   AOL.com offers the latest in news, entertainment, finance, lifestyle and weather, as well as trending videos and search.

6. Glossary of HVAC terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_HVAC_terms

   A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons. The high setting is used during extreme weather, and the low setting is used during moderate weather. This type of air conditioner produces a balanced temperature and is in use for a longer period of time.

7. Power supply - Wikipedia

   en.wikipedia.org/wiki/Power_supply

   An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics because of their safety; the hazardous 120 or 240 volt main current is transformed down to a ...