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This website provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for proper use of
efficient products. These members have made a commitment towards manufacturing
and promoting energy efficient windows.
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National Fenestration Rating Council (NFRC) is a non-profit, public/private
organization created by the window, door and skylight industry. It is comprised of
manufacturers, suppliers, builders, architects and designers, specifiers, code officials,
utilities and government agencies. NFRC provides consistent ratings on window, door
and skylight products.
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