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What is Low-E glass & is it worth the cost?

by Katie
| Dec 28, 2016


Improved energy efficiency is always a valued asset in any home; whether you are looking to tighten up your windows or your entryway. What is Low-E glass? How does it work? Is it worth it?

What is Low-E Glass?

Low-E glass stands for low emissivity. Low-E glass is clear glass that has been treated with a metallic oxide coating that is nearly invisible to the naked eye. Though the coating is thin (1/100th the thickness of a human hair), it is extremely durable and creates a surface that reflects heat and blocks UV rays, while allowing visible light to pass through.

What does it do? How does Low-E glass work?

Low-E glass makes your home more comfortable in every season. The coating on the glass acts as an insulator in the winter. It prevents heat from escaping through the glass, helping keep the building more comfortable and reducing cold drafts near windows. In the summer time, that coating is also key to keeping your home cool. The low-e glass helps block radiant heat and ultraviolet rays.

What does this all mean? It means reducing your home's energy use for heating and cooling, leading to lower energy bills each month. Low-E glass reflects heat out in the summer and keeps the warmth inside a building in the winter, leaving your home feeling more comfortable while saving energy. That's good for you and the environment!

low-e glass inforgraphic

In addition to energy savings, low-e glass helps protect furnishings from fading. Think about all the sunlight that comes into your entry way and through your windows. Having low-e glass on your storm door and storm windows helps reduce fading on hardwood floors, curtains and other interior furnishings.

Is it worth it?

Absolutely! Low-e glass options are definitely worth the investment. For just a few more dollars than standard glass, you get the energy savings, improved year-round comfort, and protection from low-e glass. And that little extra cost can pay for itself with the money you’ll save on utility bills!

Over the past fifteen years, several research studies have proven the energy savings of low-e glass, particularly for storm windows. Learn more.


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