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  2. Heating, ventilation, and air conditioning - Wikipedia

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

    For example, a conventional heat pump system used to heat a building in Montana's −57 °C (−70 °F) low temperature or cool a building in the highest temperature ever recorded in the US—57 °C (134 °F) in Death Valley, California, in 1913 would require a large amount of energy due to the extreme difference between inside and outside air ...

  3. 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, but ...

  4. Variable refrigerant flow - Wikipedia

    en.wikipedia.org/wiki/Variable_refrigerant_flow

    Variable refrigerant flow. Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. [1] Similar to ductless mini-split systems, VRFs use refrigerant as the primary cooling and heating medium, and are usually less complex than conventional chiller -based ...

  5. 7 ways to save money on your heating bill when it's cold

    www.aol.com/news/7-ways-save-money-heating...

    Heat loss through windows is responsible for up to 30% of residential energy loss, which means that in the winter you are literally paying to heat the entire neighborhood.. Although you may be ...

  6. New Yorkers deserve cleaner heat — and lower heating bills ...

    www.aol.com/yorkers-deserve-cleaner-heat-lower...

    Fleming says his system produces more energy than his home uses. As gas bills rise and heat pumps buoyed by federal and state incentives gain popularity, many gas customers are switching to the ...

  7. 7 Ways to Reduce Energy Bills During Summer Heat - AOL

    www.aol.com/7-ways-reduce-energy-bills-035900718...

    Peak time for many electricity providers is noon-6 p.m., meaning using appliances that heat up your home outside of this timeframe when conventional heating and cooling systems are likely running ...

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