ENERGY STAR helps you meet and exceed energy-efficient standards to make your building or renovation purchases easier and long-lasting. Learn how you can save money, energy and the environment with a simple window replacement.

Window Performance Comparison Chart Many windows have spacer options, which can make a real difference in performance and comfort. The better the glass edge insulates, the less energy is lost, and the more comfortable it is near the window. As this chart shows, Envirosealed windows with Duralite warm-edge window spacers provide the best performance among available options, whether in new homebuilding or remodeling projects.
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25% adds up to more than a few cents Windows and doors account for up to 25 percent of your home's energy
consumption. Use this energy bill saving calculator to see how much you can save on your heating and cooling bills with energy – efficient Envirosealed Windows™ and Doors.
Calculate your savings