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2. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   Fitting a second pane of glass to improve insulation began in Scotland, Germany, and Switzerland in the 1870s. [3] Insulating glass is an evolution from older technologies known as double-hung windows and storm windows. Traditional double-hung windows used a single pane of glass to separate the interior and exterior spaces.

3. 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 ...

4. Window - Wikipedia

   en.wikipedia.org/wiki/Window

   The panes of glass are separated, creating an insulating air pocket that inhibits heat transfer much better than single pane windows. Double-paned windows have two parallel panes (slabs of glass) with a separation of typically about 1 cm; this space is permanently sealed and filled at the time of manufacture with dry air or other dry ...

5. Quadruple glazing - Wikipedia

   en.wikipedia.org/wiki/Quadruple_glazing

   Researchers found that on average, quad-pane windows saved 24% heating and cooling energy compared with a high-performing double- pane window. For new construction and window replacements, the quad-pane windows have payback between one and six years, depending on climate zone and utility rates. [12]

6. Chambranle - Wikipedia

   en.wikipedia.org/wiki/Chambranle

   Chambranle (Moravec, Czech Republic)In architecture and joinery, the chambranle is the border, frame, or ornament, made of stone or wood, that is a component of the three sides round chamber doors, large windows, and chimneys.

7. U.S. forces under fire in Middle East as America slides ... - AOL

   www.aol.com/news/u-forces-under-fire-middle...

   A defective drone in Iraq may have helped keep America from being dragged deeper into a widening Middle East conflict. The drone, which was launched at the Erbil air base by an Iranian-backed ...