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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.
- Home Energy Projects: An Energy Conservation Guide for Do-it-yourselfers. DIANE Publishing. 1996. p. 62. ISBN 0-7881-3373-X.
- Oliver R. Williamson, Sarah Cory Rippey (1906). The Complete Home. Original from the University of California: D. Appleton and company. p. 51.
- "History of Storm Windows Beautiful Home Design". Retrieved 4 June 2012.
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