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2. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   Surface #1 is facing outside, surface #2 is the inside surface of the exterior pane, surface #3 is the outside surface of the interior pane, and surface #4 is the inside surface of interior pane. The window frame is labelled #5, a spacer is indicated as #6, seals are shown in red (#7), the internal reveal is on the right hand side (#8) and the ...

3. Window insulation - Wikipedia

   en.wikipedia.org/wiki/Window_insulation

   Single glass windows are no longer in general use. [4] The insulation provided by double or triple glazing can be further improved by selecting windows with low-e coatings, thermal breaks and argon or other similar gas between the panes, and also by selecting windows with high energy-efficient frames.

4. Storm window - Wikipedia

   en.wikipedia.org/wiki/Storm_window

   Triple-Track: Consisting of two window panes and a half-screen on three separate tracks, allowing for adjustable ventilation. Two-Track Sliders: Designed for horizontal opening, suitable for slider windows. Basement Storm Windows: Typically a single fixed pane of glass covering the window. "The Best Storm Window Options for Added Insulation".

5. Window insulation film - Wikipedia

   en.wikipedia.org/wiki/Window_insulation_film

   A film is attached to the window frame to trap a pocket of air between the glass and the film, creating a double-glazed system with an insulating gap of still air. Thermal conductivity of still air is 0.024 W/(m.K) and much lower than that of glass (0.96 W/(m.K)). [1]

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. 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 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]