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What Makes an ENERGY STAR®-Rated Replacement Window?

Products that have earned the ENERGY STAR® label consume 20 to 30 percent less energy than other similar products. When it comes to replacement windows, choosing ENERGY STAR products doesn’t just help lower your energy bill; it also results in a more comfortable home.

What Makes an ENERGY STAR®-Rated Replacement Window?

In today’s post, your leading window replacement expert, Renewal by Andersen® of Seattle, discusses the qualities a window needs to have to be ENERGY STAR-rated.

U-Factor – This measures the way heat circulates through a window. Windows with a lower U-factor offer better insulation.

Solar Heat Gain Coefficient (SHGC) – This is a value of the amount of heat and light that can enter your home through the window. The lower the SHGC, the less air travels inside.

Air Leakage (AL) – This measures the amount of air that passes through the frame and joints per square foot of window space. A lower AL rating means less air flow. Renewal by Andersen® casement windows are created from quality materials that create weather-tight and energy-efficient windows.

Your Trusted ENERGY STAR Partner

Andersen Corporation was recently recognized as a 2019 ENERGY STAR Partner of the Year — Sustained Excellence Award winner, the highest award given by ENERGY STAR for protecting the environment through superior energy efficiency achievements. Andersen was the first company to earn the award in 1999.

“Our customers trust Andersen for beautiful, enduring, high-performing windows and doors that also offer the highest standards of energy efficiency,” says Annie Zipfel, Andersen Corporation’s senior vice president and chief marketing officer. “We are proud to align with the EPA and the ENERGY STAR program to help customers choose energy efficient products and continue to build awareness for the importance of energy efficiency.”

The company is working on reducing energy use within its operation. One of Andersen’s biggest goals is to reduce their energy use by 20 percent by 2020.

Choose Renewal by Andersen of Seattle for high-quality and energy-efficient windows and doors. We offer double-hung, picture, sliding and bay windows. Call us at (206) 686-7733 or complete our online form for a free consultation. We work with homeowners in Seattle.


"Our windows are beautiful, thank you so much!"

Jess | WA
November 30

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