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LINCOLN GREEN ENERGY
The website of the Lincoln, MA Green Energy Committee
Climate Minute #2 Windows Appendix 1
Replacing a Fixed 3’x4’ Single-glazed Window with Triple-glazed
The “Installed Costs” below are based on a recent price check. Since prices change fast in the window market, please take these costs only as illustrations for comparison.
*U-value (reciprocal of R-value) is the rate of heat transfer through the window. Lower is better.
**Assumes installation of about 10 windows at the same time, which lowers the overall cost per window; includes $500/window for installation.
***Assumes (A) heating with good cold-climate heat pump and (B) electricity rates at Lincoln Standard Green level. Does not assume any incentives, which may shorten the payback period by a few years.
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