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What is Low-E glass?
Low-E (low-emissivity) glass has an invisible metallic coating, thinner than a human hair, that reflects heat while letting natural light through. It has become the standard for energy-efficient windows.
How Low-E coatings work
Regular glass lets heat pass through easily in both directions. A Low-E coating changes that. Microscopic silver layers reflect infrared radiation, which is heat, while visible light passes through.
In winter, the coating reflects your indoor heat back inside instead of letting it escape. In summer, it reflects the sun's heat back outside before it can enter your home. You keep the clear view and the daylight.
With Low-E glass
Benefits you'll notice
No cold spot by the window
Standard windows create cold or hot zones near the glass. Low-E glass narrows that difference, so you can use the seat by the window in winter, and summer sun won't turn your reading nook into a sauna.
Less fading
Low-E glass blocks much more ultraviolet light than regular glass, which helps protect drapes, carpet, furniture and floors from fading.
Lower energy costs
Reflecting heat in the right direction means your furnace and air conditioner work less, season after season.
Low-E in a cold climate
See what Department of Energy research found for low-E storm windows in Iowa, Minnesota and Wisconsin, by climate zone.
Ask about Low-E on your order.
Available on our storm doors and storm windows.