Products in the wood-Ultrex line from Integrity® by Marvin Windows and Doors was named as Most Efficient by the Environmental Protection Agency (EPA), as part of the EPA’s Energy Star program. Most Efficient products have gone through rigorous testing and independent certification above and beyond regular Energy Star certification.

Integrity Windows and Doors achieved the Most Efficient certification in several climate zones with its tripane Wood-Ultrex Series windows.

For the full list of companies who earned the Most Efficient designation, go to DWM magazine’s website and click on the high-performance windows tab.

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