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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

"The installation crew was very professional and answered what questions I had. And they cleaned up when they were finished. We're very pleased with our windows & patio doors. Highly recommend Renewl by Anderson."

Pamela D
Feb 13, 2023

"Expert services from estimate until completion. Was kept informed during the whole process"

Michael Koenen
Apr 21, 2023

"Truly an easy and professional experience from start to finish of the project. The new windows in my home has improved the curb appeal of the home and I’m looking forward to seeing the impact it will have on my utility costs. Would recommend this company to anyone looking for replacement windows."

Cathy Wiggins
Apr 18, 2023

"Every step of the process in getting our windows was seamless. The sales associate, the person who took measurements, the person who updated me about our order every 2 weeks while it was being filled, and the people who installed the windows were all professional, helpful, and kind. Especially to my kids!"

Dru Pyron Caldwell
Apr 16, 2023

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