National Fenestration Rating Council

National Fenestration Rating Council North America's largest independent, non-profit, third-party rating and labeling system for the energy performance of windows, doors, and skylights.

Celebrating 35 years of fair, accurate and credible ratings.

As homeowners seek ways to stay comfortable during record summer temperatures, trusted thermal performance data is more ...
07/08/2026

As homeowners seek ways to stay comfortable during record summer temperatures, trusted thermal performance data is more important than ever.

Here, Better Homes & Gardens highlights solar window film, the growing consumer interest in energy-efficient solutions, and the role NFRC ratings play in helping consumers make informed decisions.

Here's how solar window film can help reduce energy use and save on utilities this summer.

06/09/2026

Reminder! The following document is open for public review and comment through June 29: NFRC 100-2026[E0A0]: Procedure for Determining Fenestration Product U-factors

GREENBELT, MD (May 21, 2026) — The National Fenestration Rating Council (NFRC) Board of Directors has approved an NFRC document, now open for public review in accordance with the American National Standards Institute’s (ANSI) process. The public review and comment period run from...

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6305 Ivy Lane, Ste 410
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