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2. Window insulation film - Wikipedia

   en.wikipedia.org/wiki/Window_insulation_film

   Using the European standard a window with an ideal gap of 17 mm has a simulated U-Value of about 2.8 W/(m 2 K), a window with a much smaller gap of 6 mm has a U-value of about 3.3 W/(m 2 K), while a single glazed window has a U-value of about 5.5 W/(m 2 K). [2] (see also insulated glazing).

3. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   A typical installation of insulated glass windows with uPVC frames. Possibly the earliest use of double glazing was in Siberia, where it was observed by Henry Seebohm in 1877 as an established necessity in the Yeniseysk area where the bitterly cold winter temperatures regularly fall below -50° C, indicating how the concept may have started: [2]

4. 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 ...

5. Glazing (window) - Wikipedia

   en.wikipedia.org/wiki/Glazing_(window)

   The ideal gap size varies by location, but on average it ranges from 15-18 mm thick, giving a final assembly size of 23-26 mm assuming a typical glazing thickness of 4 mm. [9] A double-paned window with air in the gap has an R-value of 2.1, which is much better than the 0.9 that a single pane of glass yields. A triple-paned window, which is not ...

6. Window - Wikipedia

   en.wikipedia.org/wiki/Window

   A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air.Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame [1] in the opening; the sash and frame are also referred to as a window. [2]

7. Quadruple glazing - Wikipedia

   en.wikipedia.org/wiki/Quadruple_glazing

   Standard quadruple glazed window - openable The quadruple glazing, Q-Air, on Deg 8 building in Oslo, Norway (2020). Renovation brings U g value of 0,29 W/(m 2 K) [R-value 20 Quadruple glazing ( quadruple-pane insulating glazing ) is a type of insulated glazing comprising four glass panes, commonly equipped with low emissivity coating and ...