What Do Energy Star Window Ratings Mean

Energy Star windows help lower energy bills and boost efficiency. Discover what these ratings mean and where to find qualifying windows .

Understanding ENERGY STAR window ratings can help you save on energy bills. Learn how U-factor, SHGC, and climate zones affect window performance.
Window Ratings

Know how to buy energy -efficient windows with window ratings . Find out about window ratings certifications, ENERGY STAR ® program, and more.
Understanding Energy Star window glass ratings is crucial for homeowners looking to improve energy efficiency and reduce energy consumption. By choosing windows and doors with the Energy Star certification, you can benefit from lower energy bills, enhanced insulation, and a smaller carbon footprint.

Energy Star For Windows
Ratings for Energy Star windows , doors, and skylights are based on U-factor and Solar Heat Gain Coefficient, or SHGC. Recall that U-factor is the inverse of R-value.
Lower energy consumption also reduces greenhouse gas emissions from power plants and homes. Thanks to advances in technology, today's ENERGY STAR certified windows , doors, and skylights offer greater savings than ever before. Just look for the correct ENERGY STAR label for where you live.

PDF Guide to Energy
Guide to Energy -Efficient Windows Replacing your home's windows with ENERGY STAR ® qualified windows will improve indoor comfort and filter out damaging ultraviolet light, while potentially saving you hundreds of dollars a year on heating and cooling costs.
Windows have many uses in your home from adding windows ; depicts a certified light to making your home more visually appealing. window for the U.S. However, old, poorly made, drafty, or degraded Northern Zone windows can waste lots of energy and leave you very uncomfortable when weather is the most extreme.

ENERGY STAR Windows
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. To find ENERGY STAR windows for your specific climate zone, use our Window Selection Tool.





Energy -efficient windows and doors are essential for saving energy , reducing bills, and ensuring a comfortable living environment. On October 23, 2023, the ENERGY STAR ® program introduced new criteria for doors and windows to ensure that they meet stringent energy efficiency standards.