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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. In the summer, a window screen would be installed on the exterior over the double-hung window to keep out animals and insects.
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.
Overhead cross-section of a double-paned window. The strategy to reduce conduction is the use of Insulated glazing, where two or more panes of glass are used in series, each separated from each other by a space. Double-paned windows are the norm in new residential installations, as they offer substantial energy savings in comparison to single ...
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]
Storm windows exist in North America, but are uncommon in continental Europe, where double, triple or quadruple glazing is prevalent. Storm windows can be made of glass, rigid plastic panels, or flexible plastic sheets; and may be permanently or temporarily mounted. They function similarly to insulated glazing. The term may also refer to a ...
Modern double-glazed sash windows are available. These may have true muntins or "glazing bars", or may imitate them by applying them to the surface of the glazing, giving the appearance of multiple small panes , whereas each sash consists of only one large double-glazed unit.
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