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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...

    Some homes are able to keep naturally cooler than others, but many people consider installing central air conditioning to keep their homes tolerable. See Our List: 100 Most Influential Money Experts

  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. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [ 1 ] [ 2 ] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs.

  5. Is It Cheaper To Run Space Heaters Or Central Heat? - AOL

    www.aol.com/cheaper-run-space-heaters-central...

    Consumer Reports’ lab engineers tested more than 90 space heaters and found that the highest-rated models can heat an average-sized room (200 square feet) in about 15 minutes, with individual ...

  6. Extreme heat has people cranking up their air conditioners ...

    www.aol.com/news/extreme-heat-people-cranking...

    That boost allowed state officials to help more than 100,000 residents a year with utility bills and installing new air conditioners, up from 65,000 households before the influx.

  7. 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]

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