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Flashover normally occurs at 500 °C (932 °F) or 590 °C (1,100 °F) for ordinary combustibles and an incident heat flux at floor level of 20 kilowatts per square metre (2.5 hp/sq ft). [ jargon ] An example of flashover is the ignition of a piece of furniture in a domestic room.
Gypsum concrete is lightweight and fire-resistant. A 1.5-inch slab of gypsum concrete weighs 13 pounds per square foot versus 18 pounds per square foot for regular concrete. [10] Even though gypsum concrete weighs less, it still has the same compressive strength as regular concrete, based on its application as underlayment or top coat flooring ...
The ground floor with a slab on grade has less temperature rise compared to middle and top floors, and an increase of the supply air temperature causes a decrease in the temperature rise. The temperature rise is not significantly affected by the perimeter zone orientation, the internal heat gain and the window-to-wall ratio. [16]
Underfloor heating and cooling is a form of central heating and cooling that achieves indoor climate control for thermal comfort using hydronic or electrical heating elements embedded in a floor. Heating is achieved by conduction, radiation and convection. Use of underfloor heating dates back to the Neoglacial and Neolithic periods.
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Wright reportedly was so impressed [citation needed] that he invented radiant floor heating which uses hot water as the heating medium. Wright introduced floor heating to American houses in the US in the 1930s. [7] Instead of ondol-hydronic radiant floor heating, modern-day houses such as high-rise apartments have a modernized version of the ...
The CDC report noted that exposure to formaldehyde contained in the flooring was higher than original calculated, increasing the cancer risk by about three times from an earlier version of the report.
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