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  2. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    Saddle-style window mounted heat pump 3D sketch. Window mounted heat pumps run on standard 120v AC outlets and provide heating, cooling, and humidity control. They are more efficient with lower noise levels, condensation management, and a smaller footprint than window mounted air conditioners that just do cooling. [40]

  3. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    An industrial furnace, also known as a direct heater or a direct fired heater, is a device used to provide heat for an industrial process, typically higher than 400 degrees Celsius. [1] They are used to provide heat for a process or can serve as reactor which provides heats of reaction.

  4. Radiant heating and cooling - Wikipedia

    en.wikipedia.org/wiki/Radiant_heating_and_cooling

    Radiant heating and cooling is a category of HVAC technologies that exchange heat by both convection and radiation with the environments they are designed to heat or cool. There are many subcategories of radiant heating and cooling, including: "radiant ceiling panels", [ 1 ] "embedded surface systems", [ 1 ] "thermally active building systems ...

  5. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    Reducing the output temperature to around 30 °C (86 °F) which requires piped floor, wall or ceiling heating, or oversized water to air heaters. Increasing the input temperature (e.g. by using an oversized ground source or by access to a solar-assisted thermal bank [ 10 ] ).

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

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

    Central heating units that use fuels such as natural gas and coal to generate electricity are considered the least efficient, according to a blog from Ventwerx HVAC, a California HVAC repair and ...

  7. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    The efficiency of air source heat pumps is measured by the coefficient of performance (COP). A COP of 4 means the heat pump produces 4 units of heat energy for every 1 unit of electricity it consumes. Within temperature ranges of −3 °C (27 °F) to 10 °C (50 °F), the COP for many machines is fairly stable.

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