ENERGY STAR® LogoThe Department of Energy (DOE) and the Environmental Protection Agency (EPA) have created an ENERGY STAR® designation for products that meet specific energy performance criteria. If a window has the ENERGY STAR designation, it will be labeled to show the zones in which it is qualified. Climate zones have different recommended energy-efficient performance levels for windows, doors, and skylights. You can use the NFRC label or the NFRC Certified Products Directory to compare ENERGY STAR products.

Climate Zones

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ES_ME_2023Windows for residential buildings are eligible for ENERGY STAR Most Efficient recognition in 2023.

View the criteria for windows for the ENERGY STAR Most Efficient Program.

Information and data on this website follow the U.S. ENERGY STAR criteria. Canada is an international partner in the ENERGY STAR program. The criteria for fenestration in Canada are different than in the United States. For information on products in Canada, see Natural Resourses Canada.