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  2. Thermal transmittance - Wikipedia

    en.wikipedia.org/wiki/Thermal_transmittance

    Although the concept of U-value (or U-factor) is universal, U-values can be expressed in different units. In most countries, U-value is expressed in SI units, as watts per square metre-kelvin: W/(m 2 ⋅K) In the United States, U-value is expressed as British thermal units (Btu) per hour-square feet-degrees Fahrenheit: Btu/(h⋅ft 2 ⋅°F)

  3. Dynamic insulation - Wikipedia

    en.wikipedia.org/wiki/Dynamic_insulation

    With this definition, the U-value of the dynamic wall decreases exponentially with increasing air speed. As stated above the conductive heat flow into the insulation on the warm side is very much greater than that leaving the cold side. In this case it is 6.21 X 4 / 0.0504 = 493 times for an air speed of 1 mm/s (Table 1).

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  5. Window insulation - Wikipedia

    en.wikipedia.org/wiki/Window_insulation

    The U-value is used to refer to the amount of heat that can pass through a window, called thermal transmittance, with a lower score being better. [1] The U-factor of a window can often be found on the rating label of the window. Although the concept of U-value (or U-factor) is universal, U-values can be expressed in different units. In most ...

  6. Heat transfer coefficient - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer_coefficient

    Architects and engineers call the resulting values either the U-Value or the R-Value of a construction assembly like a wall. Each type of value (R or U) are related as the inverse of each other such that R-Value = 1/U-Value and both are more fully understood through the concept of an overall heat transfer coefficient described in lower section ...

  7. A.J. Dybantsa, No. 1-ranked college basketball recruit ...

    www.aol.com/sports/j-dybantsa-no-1-ranked...

    A.J. Dybantsa, the top college basketball recruit in the class of 2025, announced his commitment to BYU during Tuesday's episode of ESPN's "First Take." "A lot stood out on my visit," Dybantsa ...

  8. 76ers All-Star Tyrese Maxey reportedly out 'couple of weeks ...

    www.aol.com/sports/76ers-star-tyrese-maxey...

    The Philadelphia 76ers' season might be cursed. Shams Charania of ESPN reported Thursday that Tyrese Maxey, one of the Sixers' stars, is expected to miss a "couple of weeks" with a right hamstring ...

  9. On Today's Date: First Northeast Snowstorm Of A ... - AOL

    www.aol.com/news/todays-date-first-northeast...

    For both Baltimore (77 inches) and Washington, D.C. (56.1 inches), 2009-2010 remains the snowiest season on record. Jonathan Erdman is a senior meteorologist at weather.com and has been covering ...