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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. Ondol - Wikipedia

    en.wikipedia.org/wiki/Ondol

    Ondol (ON-dol; / ˈ ɒ n. d ɒ l /, [1] Korean: 온돌; Hanja: 溫突/溫堗; Korean pronunciation:) or gudeul (구들; ) in Korean traditional architecture is underfloor heating that uses direct heat transfer from wood smoke to heat the underside of a thick masonry floor. In modern usage, it refers to any type of underfloor heating, or to a ...

  5. Underfloor air distribution - Wikipedia

    en.wikipedia.org/wiki/Underfloor_air_distribution

    Underfloor air distribution (UFAD) is an air distribution strategy for providing ventilation and space conditioning in buildings as part of the design of a HVAC system. UFAD systems use an underfloor supply plenum located between the structural concrete slab and a raised floor system to supply conditioned air to supply outlets (usually floor ...

  6. Pilae stacks - Wikipedia

    en.wikipedia.org/wiki/Pilae_stacks

    Pilae stacks are stacks of pilae tiles, square or round tiles, that were used in Roman times as an element of the underfloor heating system, [1] common in Roman bathhouses, called the hypocaust. The concept of the pilae stacks is that the floor is constructed at an elevated position, allowing air to freely circulate underneath and up, through ...

  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    The whole floor is evenly heated. Thus, the room is heated from the bottom up. Radiant floor heating eliminates the draft and dust problems associated with forced air heating systems. radiation The transfer of heat directly from one surface to another (without heating the intermediate air acting as a transfer mechanism). SEER

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