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2. Seasonal energy efficiency ratio - Wikipedia

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

   (72,000 BTU/h) × (1000 h/year) × ($0.12/kW·h) ÷ (10 BTU/W·h) ÷ (1000 W/kW) = $860/year. Example 2. A residence near Chicago has an air conditioner with a cooling capacity of 4 tons and an SEER rating of 10. The unit is operated 120 days each year for 8 hours per day (960 hours per year), and the electric energy cost is $0.10 per kilowatt ...

3. British thermal unit - Wikipedia

   en.wikipedia.org/wiki/British_thermal_unit

   The British thermal unit ( Btu) is a measure of heat, which is a form of energy. It was originally defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is also part of the United States customary units. [ 1] The SI unit for energy is the joule (J); one Btu equals about 1,055 J ...

4. Ton of refrigeration - Wikipedia

   en.wikipedia.org/wiki/Ton_of_refrigeration

   US Customary and Imperial. 12,000.00 Btu IT /h. 2,593.90 ft⋅lbf/s. A ton of refrigeration ( TR or TOR ), also called a refrigeration ton ( RT ), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment. It was originally defined as the rate ...

5. Stay Cool and Save Energy With the Best Ductless Air Conditioners

   www.aol.com/dont-lose-cool-grab-one-145500276.html

   Ductless mini-split air conditioners are a sleeker alternative to window AC units and bulky HVAC systems. ... The 9,000-BTU system can be used for heating and cooling in spaces up to 350 square ...

6. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [ 2][ 3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [ 4] Heat pumps are similar in many ways to air conditioners ...

7. Windmill vs. July: What’s the best air conditioner? - AOL

   www.aol.com/news/windmill-vs-july-best-air...

   The Windmill AC $319.99 at Best Buy. The Windmill AC $299.00 at Windmill air. Windmill, unlike July, has two types of window air conditioners: its original model (starting at $339) and a ...