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Weather-Stripping Windows with V-Strip
An in-depth window study on six homes compares the effectiveness of plastic vs. metal weatherstripping.
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Energy-Efficient Window Retrofits: Install with Care
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Retrofitting a house with high- performance windows can produce significant energy savings and improved comfort. However, when the right window is installed incorrectly--or worse yet, the wrong window is installed incorrectly--energy savings will be few, structure and furnishings may be damaged, and the occupants' safety may be jeopardized. [continue reading]

Selecting Windows for Energy Efficiency
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An understanding of some basic energy concepts is essential to choosing appropriate windows and skylights. [continue reading]

PRISM Does Windows
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A new and improved version of the most widely used computer software for analyzing retrofit energy savings from utility billing data is now available. [continue reading]

Don't Throw that Window Out the Window!
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There are many ways to retrofit a window. Most strategies involve replacing the glass, frame, and sash with double-paned low-E glass, and a new wood or vinyl frame and sash. [continue reading]

"Superwindow" Retrofits Show Significant Energy Savings
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Windows account for a fairly large percentage of the heat loss of houses. Even in new homes built to stringent energy code, windows still account for about 25% of the overall conductive heat loss. [continue reading]

Sizing Up Skylights
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Skylights, like windows, are distinctive features of homes that greatly influence their aesthetics. [continue reading]

Out The Window with U-Guessed-It Values
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Thermal performance in a window is expressed as a "U-value," a measure of heat transfer through it--the greater the heat loss, the higher the U-value. [continue reading]

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Macie Melendez
Adventures in Blower Door Testing
When Steve Mann (of Home Energy Services) asks you to come along for the first blower door testing in a ...


























