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Which Renewal by Andersen® Glass Option Is Right for You?

When it’s time to get new replacement windows for your home, it’s a good idea to consider the multiple glass panes in insulated glass units (IGUs) instead of the old single-pane glass windows of old. Renewal by Andersen® manufactures and installs multiple-pane glass windows that help conserve energy and make for a more comfortable indoor environment.

Which Renewal by Andersen® Glass Option Is Right for You?

In this post, you will learn about the type of glass that comes with your new windows.

High-Performance™ Low-E4®

Our windows and doors come with High-Performance™ Low-E4® dual-pane glass as a standard feature. This is the glass for areas that experience plenty of sun and minimal cloud cover. It can filter out the sun’s heat while allowing in plenty of light. This is ideal for all climates.

High-Performance Low-E4 SmartSun™

Upgrade to this type of glass for all the benefits of Low-E4 glass plus up to 95% filtration of the sun’s harmful ultraviolet (UV) rays, all while providing your home with lots of daylighting. High-Performance Low-E4 SmartSun™ is also ideal for all climates.

High-Performance Low-E4 SmartSun With HeatLock® Technology™

Upgrade to High-Performance Low-E4 SmartSun glass with HeatLock® Technology to enjoy the benefits of SmartSun plus a special coating that saves energy and reflects heat back into the room. Enjoy warmer indoor environments during even the coldest winters with this glass option.

High-Performance Low-E4 Sun Glass

Sun Glass offers outstanding thermal performance with the benefits of High-Performance Low-E4 glass plus a subtle tint for added heat blocking. This is the perfect choice for homes in southern climates.

High-Performance Low-E4 PassiveSun® Glass

For homes in northern climates, ask your windows company about PassiveSun® glass. This protects you in cold weather and allows the sun’s heat to enter your home, leading to savings in indoor heating.

Renewal by Andersen of St. Louis offers some of the best window glass products in the industry. Get in touch with us today at (314) 332-2364, or contact us via this page.

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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