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  2. Heating degree day - Wikipedia

    en.wikipedia.org/wiki/Heating_degree_day

    For example, temperatures often drop below the base temperature during night (daily low temperature in diurnal variation), but because of insulation, heating is unnecessary. In the end of spring and in the beginning of fall or in the winter depending on the climate, sufficient insulation keeps the indoor temperature higher than the outdoor ...

  3. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    The mono-sulfate (AFm) now more soluble at low temperature slowly dissolves to recrystallize as the less soluble ettringite (AFt). AFt crystal structure hosts more water molecules than AFm. So, AFt has a higher molar volume than AFm because of its 32 H 2 O molecules. During months, or years, after young concrete cooling, AFt crystallizes very ...

  4. Diurnal air temperature variation - Wikipedia

    en.wikipedia.org/wiki/Diurnal_air_temperature...

    This explains why an area like the Pinnacles National Park can have high temperatures of 38 °C (100 °F) during a summer day, and then have lows of 5–10 °C (41–50 °F). At the same time, Washington D.C. , which is much more humid, has temperature variations of only 8 °C (14 °F); [ 1 ] [ dead link ‍ ] urban Hong Kong has a diurnal ...

  5. Underfloor air distribution - Wikipedia

    en.wikipedia.org/wiki/Underfloor_air_distribution

    The same study found that air temperature rise in summer is higher than in winter and it also depends on the climate. [16] 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.

  6. Concrete slab - Wikipedia

    en.wikipedia.org/wiki/Concrete_slab

    Concrete has a relatively high thermal mass, meaning that it takes a long time to respond to changes in ambient temperature. [9] This is a disadvantage when rooms are heated intermittently and require a quick response, as it takes longer to warm the entire building, including the slab.

  7. Living and dying in America’s hottest big city: One week in ...

    www.aol.com/living-dying-america-hottest-big...

    Over the past 100 years, the average July temperature in Phoenix has risen dramatically. In the 1920s, it ranged from 89.3 to 92.7 degrees; in the past decade, it sat between 94.7 and 102.7 degrees.

  8. Urban heat island - Wikipedia

    en.wikipedia.org/wiki/Urban_heat_island

    A definition of urban heat island is: "The relative warmth of a city compared with surrounding rural areas." [14]: 2926 This relative warmth is caused by "heat trapping due to land use, the configuration and design of the built environment, including street layout and building size, the heat-absorbing properties of urban building materials, reduced ventilation, reduced greenery and water ...

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  1. Related searches low temperature during concrete laying on floor drain is higher than night

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