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Renewal by Andersen puts much time and effort into ensuring the lasting energy efficiency of the windows they produce. Each Andersen window is EnergyStar rated. Each one utilizes materials that have been specifically designed for increased energy efficiency, including our exclusive Fibrex material and High Performance™ Low-E4 glass packages. You won’t find a window company with a better understanding of our deeper dedication to energy efficient windows.

The need to save money on monthly energy bills is something to which every homeowner can relate. It seem that every year the prices of gas, oil, and electricity get higher and higher and keeping a home bright and comfortable gets more and more expensive. Renewal by Andersen seeks to counteract those skyrocketing prices with advanced windows that take into account the factors that lead to energy loss or overuse.

Renewal by Andersen’s High Performance™ Low-E4 glass is 45% more energy efficient in winter and 56% more energy efficient in winter as compared to ordinary dual panel glass.*

Renewal by Andersen’s High Performance™ Low-E4 SmartSun™ glass if the most energy efficient glass we have ever offered. High Performance™ Low-E4 SmartSun™ glass is 70% more energy efficient in summer and 45% more energy efficient in winter as compared to ordinary dual panel glass.*

For more information on the energy efficiency properties of Renewal by Andersen windows, make a call to your leading source for energy efficient replacement windows in St. Louis – Renewal by Andersen of St. Louis.

FREE Estimate on Energy Efficient Windows in St. Louis

If you live in or around St. Louis, you have only one choice for the highest quality doors and windows – Renewal by Andersen of St. Louis. Give us a call today at (314) 332-2364 to start on the path towards a brighter, more valuable home.

*Values are based on comparison of Renewal by Andersen double-hung inserted window SHGC to the SHGC for clear dual pane glass non-metal frame default values from the 2006 and 2009 International Energy Conservation Code.

Reviews

"Have nothing but great things to say about the window installation done today by John Hutchinson with Renewal by Andersen! He was friendly, personable and professional and did a great job installing. He did a great job of putting down roller pads and tarps with next to zero clean up. Would highly recommend them for any window replacement needed!"

Mark V.
Jun 26, 2025

"We had our new Renewal by Andersen windows installed on June 5th & 6th, 2025 and we LOVE them! The quality, beauty, and functionality are best-in-class! The whole experience from dinner presentation at Lazy River Grill, the initial in-home sales consultation and measurement, the regular communications from the salesman and concierge, and the installation team’s professionalism and skills made the process so seamless. This is the second home we have opted for Renewal windows and doors and have been delighted both times! Thank you Renewal by Andersen STL! "

Jeff C.
Jun 7, 2025

"I had an excellent experience with RbA STL. Our designer, Courtney, was great and the finished product is awesome. The installation was easy and the gentlemen left our home cleaner than they found it upon entering. I would recommend RbA STL - you’ll get tired from their constant contacts, and that’s a GOOD thing!"

Jeramy D
Jun 3, 2025

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