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2. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Air conditioning, often abbreviated as A/C ... The units went on sale in 1932 at US$10,000 to $ ... The value is equal to 12,000 BTU IT per hour, or 3,517 watts. ...

3. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   Air-conditioner sizes are often given as "tons" of cooling, where 1 ton of cooling equals 12,000 BTU/h (3.5 kW). 1 ton of cooling equals the amount of power that needs to be applied continuously over a 24-hour period to melt 1 ton of ice. The annual cost of electric energy consumed by an air conditioner may be calculated as follows:

4. Refrigeration - Wikipedia

   en.wikipedia.org/wiki/Refrigeration

   Refrigeration has many applications, including household refrigerators, industrial freezers, cryogenics, and air conditioning. [5] [6] [7] Heat pumps may use the heat output of the refrigeration process, and also may be designed to be reversible, but are otherwise similar to air conditioning units. [5]

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.

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7. Thermal energy storage - Wikipedia

   en.wikipedia.org/wiki/Thermal_energy_storage

   This features a 12,000 m 3 (420,000 cu ft) reinforced concrete thermal store linked to 4,300 m 2 (46,000 sq ft) of solar collectors, which will supply the 570 houses with around 50% of their heating and hot water.