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The ENERGY STAR Most Efficient 2021 designation recognizes the most efficient products among those that qualify for the ENERGY STAR program. The Great Lakes Window ecoSmart windows represent the leading edge in energy efficient products this year.
Offers almost two times the insulating properties of typical fiberglass insulation.
Delivers unsurpassed strength and durability at the meeting rail of double hung and sliding windows.
Provides additional strength at the sill to keep your windows square so they work like new for years to come.
Enhances strength and durability by fusion-welding ecoCore reinforcement into frame and sash cavities. Combined with SmartCore in select profiles, this upgrade greatly enhances thermal properties.
Select from a variety of colors for your vinyl replacement windows to match the interior and exterior of your home.Learn More
Complete your windows with matching hardware that looks sleek and elegant while keeping your home safe.Learn More