ENERGY STAR Program

Learn how to identify windows and doors that will provide the best energy efficiency and savings for your home.

The ENERGY STAR program for windows divides the country into four distinct climate zones to recognize the varying heating and cooling months among the states. For patio doors, there is only one U-Factor and one Solar Heat Gain Coefficient (SHGC) requirement for Energy Star compliance.

Please consult your home improvement or new construction professional for specific thermal properties that vary based on glass options and grid choices, and verify your window’s actual performance to ensure Energy Star rating in your specific climate zone.

Learn more about the ENERGY STAR program by visiting their website at www.energystar.gov.

Window Criteria

The chart to the right provides U-Factor and Solar Heat Gain Coefficient (SHGC) values used to determine if a window meets ENERGY STAR requirements for a given climate zone.

Click image to enlarge.

Door Criteria

The chart to the right provides U-Factor and Solar Heat Gain Coefficient (SHGC) values used to determine if a door meets ENERGY STAR requirements for a given climate zone.

Click image to enlarge.

Low-E and Argon Gas

Learn how Low-E coatings on glass and argon gas filled between glass panes reduces energy usage and improves the year-round comfort of your home.

Understanding Condensation

Learn more about the causes of condensation on windows in your home, as well as ways to reduce or eliminate it.

Energy Tax Credit

Learn more about the 2021 Energy Tax Credit extension and download the Ellison Manufacturer’s Certification Statement.

Learn More

Energy Savings

With multiple glass options to increase energy efficiency, there is a glass package to fit any climate need and budget. Visit the Glass section of our site to learn more about available options and energy efficiency.

View Energy Saving Options

The Ellison Warranty

Every Ellison window and patio door is backed by a limited lifetime warranty on vinyl, glass and all working parts. Each product is individually registered with a product identification number, making ordering replacement parts throughout the warranty period easy and efficient.

View Warranty & Support Details