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  2. Winter Heating: How To Choose the Best System for Your ... - AOL

    www.aol.com/finance/winter-heating-choose-best...

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  3. Cold district heating - Wikipedia

    en.wikipedia.org/wiki/Cold_district_heating

    The annual performance factor of heat pumps is also relatively high, especially compared to air-sourced heat pumps. A study of 40 systems commissioned up to 2018 showed that the heat pumps achieved an seasonal COP of at least 4 for the majority of the systems studied; the highest seasonal COP values were about 6. [1]

  4. Seasonal energy efficiency ratio - Wikipedia

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

    "Cold climate" heat pumps are designed to optimize efficiency below 0 °F (−18 °C). As of 2023 heat pumps are marketed that will extract heat from outdoor temperatures as low as −40 °F (−40 °C). In the case of cold climates, water or ground-source heat pumps are often the most efficient solution.

  5. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    An air source heat pump can be used to air condition the building during hot weather, and to warm the building using heat extracted from outdoor air in cold weather. Air-source heat pumps are generally uneconomic for outdoor temperatures much below freezing. In colder climates, geothermal heat pumps can be used to extract heat from the ground ...

  6. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    In cold weather, a heat pump can move heat from the cool outdoors to warm a house (e.g. winter); the pump may also be designed to move heat from the house to the warmer outdoors in warm weather (e.g. summer). As they transfer heat rather than generating heat, they are more energy-efficient than other ways of heating or cooling a home. [2]

  7. US aims to speed heat pump manufacturing using Cold War-era law

    www.aol.com/us-aims-speed-heat-pump-161414522.html

    WASHINGTON (Reuters) -The U.S. will fund nine projects with $169 million from last year's climate bill to speed manufacturing of heat pumps, systems that can heat and cool homes and businesses ...

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