Schedule a Free Consultation



How Low-E Glass Can Keep You Comfortable All Year Long

Glass windows that are poorly insulated are a leading cause of energy loss in a typical home. When it is cold outside, the heated air inside your home can radiate through the glass to the outside, making your furnace or boiler “kick in” more often. At the same time, chilly outside air can “leak” into your home through an ordinary glass pane – even if they are dual pane windows. During the hot, humid summer months, cool, conditioned air can escape while warm air infiltrates.

That’s what makes Renewal by Andersen’s High Performance™ Low-E4 glass such an important part of your new windows’ energy efficiency. With our High Performance™ Low-E4 installed, your windows become an effective barrier against thermal conductivity and energy loss.

Renewal by Andersen’s High Performance™ Low-E4 glass is 45% more energy efficient in summer and 56% more energy efficient in winter as compared to ordinary dual panel glass.* Sounds good, right? Well those numbers weren’t high enough for Renewal by Andersen, so they started to produce High Performance™ Low-E4 SmartSun™ glass, which is 70% more energy efficient in summer and 45% more energy efficient in winter as compared to ordinary dual panel glass.*

What Makes Glass Low-E?

Low-E glass is a way to control the heat being allowed into and out of your home. Low-E is a specially coated glass that allows light to pass through, but controls the “emissivity” of heat energy. Emissivity is a measurement of how readily a material radiates absorbed energy. The lower the emissivity value, the more energy efficient the material.

By blocking heat-generating ultraviolet light and reflecting heat back to its source, the High Performance™ Low-E4 glass in our Renewal by Andersen windows mean you’ll need less heating or air conditioning to keep your home at a comfortable temperature. High Performance™ Low-E4 makes our windows some of the most energy efficient windows in St. Louis homes.

FREE Estimate on Replacement Windows in St. Louis

Draw inspiration for your window replacement project from a leading local expert on replacement windows and doors – Renewal by Andersen of St. Louis. Call us today at (314) 310-3636 to schedule a FREE in-home estimate.

*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

"Scheduled for December, Installed in October, High quality windows and Excellent install team. I haven't seen people work together like that in years. I am definitely impressed."

Raymond Mills
Oct 13, 2022

"The service provided by Renewal by Anderson is great, both on the sales and the installation side. Our sales representative was very accommodating and helpful. The installation crew was efficient and they all were professional. These are really nice windows and a great upgrade especially from builder-grade windows."

Brad Allen
Nov 17, 2022

"It is great to do business with a company that still cares about what they do and respects the end goals. We appreciate your craftsmanship professionalism, and cannot say enough about the wonderful experience. It was clear from the onset of the installation we got the A Team and we certainly appreciate that."

1speedwagon
Nov 17, 2022

"Everyone I worked with from setting up the initial appointment to the salesman to the installers to everyone who checked on us and kept us updated on the progress of the windows was courteous, professional, and responsive. There’s always someone who is willing to answer your question without jumping through hoops which is rare these days! The installers were on time, did a beautiful job, cleaned up the space better than I expected, and even helped me with some blinds I couldn’t remove and fixed my squeaky front door! I’ve already recommended Renewal by Anderson to friends!"

Karen Mortillaro
Nov 19, 2022

View All Reviews