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Ultra-R, Multi-Cavity, Multi-Coating Glazing System from Hurd


Without exaggeration, the most energy-efficient window glazing on the planet.

Meet the next great advancement in windows: the multi-cavity, multi-coating glazing system of Ultra-R. It uses advanced, coated films suspended inside a premium low-E unit to create as many as four super-insulating, gas-filled cavities.

Available on all Hurd products, Ultra-R glazing achieves the highest insulation values in the window industry—from an impressive R-6 for our standard single film, argon-filled unit, all the way to an unprecedented R-20 for our custom triple film, krypton-filled techno-wonder.

Ultra-R glazing uses Heat Mirror technology, invented at MIT.

Ultra-R’s suspended films reflect heat back to its source, improve thermal insulation, block 99.5% of UV rays, reduce noise up to 20% over typical dual pane windows, and improve your comfort and energy savings dramatically.

About Hurd

Hurd Windows and Doors is headquartered in Medford, Wisconsin. The company markets products under the Hurd brand, which is recognized for its 90-plus year tradition of building custom wood windows and doors to the highest standards of excellence and quality. Hurd products are sold exclusively through more than 400 distributors in the United States and Canada, and in 20 countries worldwide. They are manufactured by approximately 400 craftspeople. With factories in Medford and Merrill, Wisconsin, Hurd products are manufactured in more than 600,000 square feet of production space. For more information, visit or call (715) 748-2011. Toll free: 1-800-433-4873.

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