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  2. The 20 best Walmart deals this week: Bedding, beauty ... - AOL

    www.aol.com/lifestyle/the-20-best-walmart-deals...

    Midea 5,000 BTU Mechanical Window Air Conditioner. $144 $149 Save $5. Why wait until summer to buy a new AC when this one is on sale right now? This small unit packs a big bunch, especially as a ...

  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. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    The Mitsubishi model was the first air conditioner with a cross-flow fan. [64] [65] [66] In 1969, the first mini-split air conditioner was sold in the US. [67] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in ...

  5. Heating, ventilation, and air conditioning - Wikipedia

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

    Multiple inventions within this time frame preceded the beginnings of the first comfort air conditioning system, which was designed in 1902 by Alfred Wolff (Cooper, 2003) for the New York Stock Exchange, while Willis Carrier equipped the Sacketts-Wilhems Printing Company with the process AC unit the same year.

  6. Editors Say These Neck Fans Kept Them Cool During the Hottest ...

    www.aol.com/8-best-wearable-air-conditioners...

    Portable Neck Fan. Jisulife's Portable Neck Fan offers more features than almost any other wearable air conditioner at this price. It features 78 air outlets that deliver a steady, cool (though ...

  7. Inverter compressor - Wikipedia

    en.wikipedia.org/wiki/Inverter_compressor

    This is a very common unit type. The rising cost of energy means that air conditioning manufacturers must develop a new generation of high-efficiency, cost-effective air conditioners for commercial buildings that meet or exceed a part-load efficiency standard of typically 18 IEER. The aim is to reduce energy use by 30% over current equipment.

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