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Windows -- Thermal properties.

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View Resource Efficient Windows

The Efficient Windows Collaborative (EWC) operates this informative site about the benefits and energy saving characteristics of efficient windows. A good overview of the various types is given in the How Windows Work section. This explains many different glazings, frames, and operating designs of the windows. The three main technologies used to improve insulating performance are covered, and...

https://www.efficientwindows.org/