Energy Savings

With multiple glass options to increase energy efficiency, there is a glass package to fit any climate need and budget.

Choose Low-E for the most effective, insulating solar control glass available. Its special, double layer of silver coating dramatically limits the sun’s penetrating heat during the summer by reflecting long-wave heat energy. During cold winter months, Low-E maintains your home’s warm, comfortable indoor temperature by permitting short-wave heat energy to enter, while keeping cold temperature out.

Ellison offers a number of different glass systems, which combine Low-E with other energy efficient options. This helps Ellison windows and doors meet ENERGY STAR requirements for the various climate zones across the United State. Visit the ENERGY STAR section of our website to learn more.

Low-E Glass Diagram

Low-E In Summer

In the summer, Low-E glass reduces heat gain from the sun to help keep the home cooler.

Low-E Glass Diagram

Low-E In Winter

In the winter, Low-E glass lets the warm, solar rays in while blocking the heat in the home from getting out.

Optional Low-E Glass Packages

Glass System
Low-E Glass

Low-E glass is coated with a microscopic layer of silver that reflects radiant solar energy while permitting visible light to pass through the glass, providing more comfort and lower energy costs.

Glass System
Low-E Glass with Argon Gas

Argon gas works like an insulating blanket between two panes of glass to further improve thermal efficiency and decrease outside sound levels.

Glass System
Ultra Low-E Glass with Argon Gas

Choose our ultimate glass package for optimal energy efficiency and maximum cost savings. Ultra Low-E glass offers three invisible layers of silver coating in addition to the superior thermal performance of argon gas.

Glass System
Triple-Pane, R-5 Compliant Glass

Triple-pane, R-5 compliant glass with Super Spacer sealant system provides industry-leading thermal resistance, noise reduction and protection from the sun. The Series 1800 offers this option with both Low-E glass with argon gas or Ultra Low-E glass with argon gas, for the ultimate in insulation. (Note: Only available on Series 1800 Windows)

Low-E and Argon Gas

Learn how Low-E coatings on glass and argon gas filled between glass panes reduces energy usage and improves the year-round comfort of your home.

Understanding Condensation

Learn more about the causes of condensation on windows in your home, as well as ways to reduce or eliminate it.


Looking for ENERGY STAR qualified products? Learn more about the climate zones and performance criteria used to identify ENERGY STAR compliant windows and doors.


Understanding Condensation

Condensation is a direct result of interior humidity and the difference between indoor and outdoor air temperature. Click the button below to download our Understanding Condensation guide for windows and doors.

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The Ellison Warranty

Every Ellison window and patio door is backed by a limited lifetime warranty on vinyl, glass and all working parts. Each product is individually registered with a product identification number, making ordering replacement parts throughout the warranty period easy and efficient.

View Warranty & Support Details