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  2. Window insulation - Wikipedia

    en.wikipedia.org/wiki/Window_insulation

    Clear double glazing has a U-factor between 1.8 and 3 W/(m 2 ⋅K) or between 0.3 and 0.5 Btu/(h⋅ft 2 ⋅°F) (about R-2) Clear triple glazing has a U-factor between 0.5 and 1 W/(m 2 ⋅K) or between 0.1 and 0.2 Btu/(h⋅ft 2 ⋅°F) (about R-3). Double and triple glazing are critical for energy efficiency. Single glass windows are no longer ...

  3. Insulated glazing - Wikipedia

    en.wikipedia.org/wiki/Insulated_glazing

    While the standard double glazing is most widely used, triple glazing is not uncommon, and quadruple glazing is produced for cold environments such as Alaska or Scandinavia. [16] [17] Even quintuple and six-pane glazing (four or five cavities) is available - with mid-pane insulation factors equivalent to walls. [18] [19] [20]

  4. Thermal transmittance - Wikipedia

    en.wikipedia.org/wiki/Thermal_transmittance

    The frame and double sealing of the window system are the actual weak points in the window insulation. Typical thermal transmittance values for common building structures are as follows: [citation needed] Single glazing: 5.7 W/(m 2 ⋅K) Single glazed windows, allowing for frames: 4.5 W/(m 2 ⋅K) Double glazed windows, allowing for frames: 3.3 ...

  5. Sensitivity analysis of an EnergyPlus model - Wikipedia

    en.wikipedia.org/wiki/Sensitivity_analysis_of_an...

    The walls are made of 25 cm thick bricks without insulation except for the cellar. The windows and glassdoors are standard double glazed with an intermediate layer of air We have used EnergyPlus for simulating the house model. For building our simulation framework we have used the software tool Building Controls Virtual Test Bed (BCVTB).

  6. R-value (insulation) - Wikipedia

    en.wikipedia.org/wiki/R-value_(insulation)

    Installed faced fiberglass batt insulation with its R-value visible (R-21) [1]. The R-value (in K⋅m 2 /W) is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3]

  7. Building insulation - Wikipedia

    en.wikipedia.org/wiki/Building_insulation

    The resistance to conducted heat loss for standard single glazing corresponds to an R-value of about 0.17 m 2 ⋅K⋅W −1 or more than twice that for typical double glazing (compared to 2–4 m 2 ⋅K⋅W −1 for glass wool batts [38]).

  8. Calculation of glass properties - Wikipedia

    en.wikipedia.org/wiki/Calculation_of_glass...

    The calculation of glass properties allows "fine-tuning" of desired material characteristics, e.g., the refractive index. [1]The calculation of glass properties (glass modeling) is used to predict glass properties of interest or glass behavior under certain conditions (e.g., during production) without experimental investigation, based on past data and experience, with the intention to save ...

  9. Solar gain - Wikipedia

    en.wikipedia.org/wiki/Solar_gain

    The shading coefficient (SC) is a measure of the radiative thermal performance of a glass unit (panel or window) in a building.It is defined as the ratio of solar radiation at a given wavelength and angle of incidence passing through a glass unit to the radiation that would pass through a reference window of frameless 3 millimetres (0.12 in) Clear Float Glass. [3]

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