Understanding Window Ratings

Window Ratings

Pick the Right Window for your Climate

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Windows for every season

Benefits: Energy & Cost Savings

Find the best energy-efficient windows for your home in just a few clicks with the Window Selection Tool.

This searchable database helps you compare different window types and options to find the ones that are right for your home and climate. Data comes directly from the NFRC Certified Products Directory of ENERGY STAR® certified windows.

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provides unbiased information and education to the public on the energy efficiency, technical, and human considerations that influence window selection and use. We do not sell, service, install, or recommend products, or endorse manufacturers. Descriptions and specifications of the products in the Window Selection Tool are provided by the manufacturer. NFRC is not liable for any manufacturing defects or inaccurate product descriptions and specifications and does not guarantee the performance of NFRC-certified windows, doors, and skylights.

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National Fenestration Rating Council
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Greenbelt, MD 20770
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