Our windows and doors can meet or exceed the performance criteria for ENERGY STAR® with a breadth of options available to meet both high performance and the style you are looking for.
ENERGY STAR® is a government-regulated program that was created by the Environmental Protection Agency (EPA), and the U.S. Department of Energy (DOE), to help consumers quickly and easily identify energy saving products. The ENERGY STAR program uses energy values obtained by window and door manufacturers through the National Fenestration Rating Council (NFRC) program. NFRC ratings are based on the energy performance of the total window or door – both glass and frame The ENERGY STAR program for the United States divides the nation into four separate climate zones – Northern, North-Central, South-Central, and Southern. The performance criteria that needs to be met in order to be ENERGY STAR compliant in specific climate zones are shown in the charts provided. Note that this information is per criteria that took effect in 2023.
Kolbe has windows and doors that can meet the strict California Title 24 Building Energy Efficiency Standards. Contact us or talk to your dealer about our products with glass options that help meet these stringent energy efficiency requirements. Search Kolbe's Energy Database
*The effective date for the Northern Zone prescriptive and equivalent energy performance criteria for windows was September 7, 2023. North-Central, South-Central, and Southern criteria will also follow 2023 guidelines.
**Northern zone windows can meet prescriptive (1st row) or alternative energy performance (2nd, 3rd, and 4th rows) criteria to qualify for ENERGY STAR.
Fenestration products may comply for Canada's ENERGY STAR program based on these compliance paths: their total U-factor, their Energy Rating (ER), or both. The Energy Rating is based on a product's overall performance based on three criteria: (1) Solar heat gain, (2) U-factor, and (3) Average air tightness. The higher the ER number, the better the product's thermal performance. The U-factor and ER criteria for Canada is shown in the chart provided. For Kolbe products that qualify for Canada's ENERGY STAR Program, search their site using the Related Links below.
Search Kolbe's Energy Database
*Criteria shown applies to windows, sliding doors, and swinging doors
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