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Whats the best way to evaluate a windows energy performance?

April 26, 2017best energy PERFORMANCE window

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Whats the best way to evaluate a windows energy performance?

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The easiest way to compare energy performance of different windows and doors is to read the National Fenestration Rating Council (NFRC) label. It provides valuable efficiency information about the product including the u-value, solar heat gain and visible light transmittance values. Also check to see if the product is ENERGY STAR® approved.