Decoding the Window Rating Label

Like a food label that lists calories and fat grams, the NFRC label lists a window’s heat retention, air leakage, and other properties in a standardized way that allows for comparison. But not every food with a nutrition label is healthy, and not every window with an NFRC label has the highest energy savings. Only the most efficient windows receive the Energy Star label. Here are some helpful tips on what to look for:

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