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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A Better Choice for Energy Efficiency Windows and doors account for up to 25% of your energy use. Save money by installing energy efficient windows and doors. Reduce your energy consumption, insulate your home better, protect the environment and lower your heating and cooling bills.
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