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Storm windows are windows that are mounted outside or inside of the main glass windows of a house. It may also refer to a small openable flap found in the side window on light aircraft. On houses they serve as a retrofit on existing windows in order to improve their thermal efficiencies. Similarly, storm doors (also called "screen doors") allow similar energy savings with less efficient primary doors - and allow a screen for summer ventilation. Storm windows can be mounted externally or internally; 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. Aside from insulation, storm windows provide an additional measure of protection for homes against damages to costly glass panes during inclement weather.〔(【引用サイトリンク】title=History of Storm Windows Beautiful Home Design )〕 ==Energy upgrade== Storm windows are a typical energy upgrade solution for cold climates. They are mostly intended to improve the insulation value (U-value) of existing windows, especially single-glazed units.〔("Storm Windows" ); Energy.gov〕 Storm windows do not make sense in buildings with energy efficient windows, or in hot or moderate climates; they only make sense in buildings where windows are a major cause of heat loss and lack of thermal comfort. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Storm window」の詳細全文を読む スポンサード リンク
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