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2. Is Central Air Worth the Cost? Plus, What You Can Do Instead

   www.aol.com/central-air-worth-cost-plus...

   Window Units and Portable Air Conditioners If you can spend most of your time in a couple of rooms in your home during the hottest months, consider a window or portable air conditioning unit.

3. Rheem Manufacturing Company - Wikipedia

   en.wikipedia.org/wiki/Rheem_Manufacturing_Company

   One of the most significant events came in 1956 with the introduction of "Rheemaire" central air conditioning and heating systems for homes. This eventually became one of the company's primary business areas. [12] [16] In 1968 [17] a plant was opened in Bergum (Burgum in Frisian) in the Netherlands. The plant was successful but had to close its ...

4. Lennox Merit Series air conditioner - Wikipedia

   en.wikipedia.org/wiki/Lennox_Merit_Series_air...

   The Merit series is the lowest cost Lennox air conditioner, and there are 4 models of Single-stage with a 13, 14, 15 or 16 Seasonal energy efficiency ratio (SEER) rating. [2] The units are also available with ratings from 1.4 tons to 5 tons. [1] The company offers a warranty of up to ten years [3]

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. 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 ...

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 ...