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.

Combat Rising Energy Hereʼs cool news for homeowners: you can stop rising energy costs in their tracks with high-performance windows. The average cost of energy used to heat and cool homes rose more than thirty-three percent in the last decade. And that trend is likely to continue.
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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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