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  2. Underfloor heating - Wikipedia

    en.wikipedia.org/wiki/Underfloor_heating

    There is a likelihood that underfloor heating may add to offgassing and sick building syndrome in an environment, particularly when the carpet is used as flooring. [citation needed] Electric underfloor heating systems cause low frequency magnetic fields (in the 50–60 Hz range), old 1-wire systems much more so than modern 2-wire systems.

  3. Hypocaust - Wikipedia

    en.wikipedia.org/wiki/Hypocaust

    Hypocaust under the floor in a Roman villa in Vieux-la-Romaine, near Caen, France. A hypocaust (Latin: hypocaustum) is a system of central heating in a building that produces and circulates hot air below the floor of a room, and may also warm the walls with a series of pipes through which the hot air passes.

  4. Little-known but efficient, a different way to heat and cool ...

    www.aol.com/news/little-known-efficient...

    Residential geothermal heat pumps currently make up just 1% of the U.S. heating and cooling market. But they're 20% of the European market, due to a long history of higher fossil fuel prices and ...

  5. Renewable heat - Wikipedia

    en.wikipedia.org/wiki/Renewable_heat

    Water circulates within the system at low temperatures (35 °C - 50 °C) making gas boilers, wood fired boilers, and heat pumps significantly more efficient. Rooms with underfloor heating are cooler near the ceiling, where heat is not required, but warmer underfoot, where comfort is most required.

  6. Heating film - Wikipedia

    en.wikipedia.org/wiki/Heating_film

    A heating film, itself, is a variation of the modern ondol, but it doesn't require hot water and pipes as it is fully electric. There are also many variations of this underfloor heating system, as many underfloor heaters are based on PTC heating element, far-infrared rays, carbon film, or cables, etc. [6]

  7. Radiant heating and cooling - Wikipedia

    en.wikipedia.org/wiki/Radiant_heating_and_cooling

    Underfloor heating systems—electric or hydronic; Wall heating systems; Radiant ceiling panels; Underfloor and wall heating systems often are called low-temperature systems. Since their heating surface is much larger than other systems, a much lower temperature is required to achieve the same level of heat transfer. This provides an improved ...

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