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Under floor radiant systems are evaluated for sustainability through the principles of efficiency, entropy, exergy [33] and efficacy. When combined with high-performance buildings, underfloor systems operate with low temperatures in heating and high temperatures in cooling [34] in the ranges found typically in geothermal [35] and solar thermal ...
Radiant heating and cooling originated as separate systems but now share a similar form. Radiant heating has a long history in Asia and Europe. The earliest systems, from as early as 5000 BC, were found in northern China and Korea. Archaeological findings show kang and dikang, heated beds and floors in ancient Chinese homes. Kang originated in ...
The control circuit in a household HVAC installation. The wires connecting to the blue terminal block on the upper-right of the board lead to the thermostat. The fan enclosure is directly behind the board, and the filters can be seen at the top. The safety interlock switch is at the bottom left. In the lower middle is the capacitor.
Such systems typically run between 100 and 500 volts, however their classifications and specifications vary greatly by geographical area (see Mains electricity by country). Mains power is typically distributed through insulated copper wire concealed in the building's subfloor, wall cavities and ceiling cavity.
The three basic types of radiant cooling are direct, indirect, and fluorescent: Direct radiant cooling - In a building designed to optimize direct radiation cooling, the building roof acts as a heat sink to absorb the daily internal loads. The roof acts as the best heat sink because it is the greatest surface exposed to the night sky.
Gypsum concrete is a building material used as a floor underlay [45] used in wood-frame and concrete construction for fire ratings, [45] sound reduction, [45] radiant heating, [46] and floor leveling. It is a mixture of gypsum, Portland cement, and sand. [45] One of its advantages is the lightweight nature.
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