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 May 15 through June 29, 2026.
The document submitted for public review, comment, and the full ANSI consensus process is:
- NFRC 100-2026[E0A0]: Procedure for Determining Fenestration Product U-factors
The document, with changes from previous versions highlighted in markup format, is available here: NFRC Documents in Public Review. The document appears in the May 15th Standards Action, marking the beginning of the 45-day open public comment period.
Process information
All changes subject to public review have been previously balloted and approved by NFRC membership and Board of Directors. As an ANSI-Accredited Standards Developer, NFRC submits any NFRC documents proposed to become ANSI Standards, as well as any proposed amendments or modifications, for public review and comment per ANSI required procedures.
The NFRC Standards Committee oversees the review process. This committee requires the balanced participation of a variety of stakeholders and is currently seeking a new member in the General Interest category, which includes: institutions of higher learning and research; federal, state, or local government and energy or building code offices; nonprofit organizations promoting energy efficiency or conservation; other standards developers involved in energy efficiency and performance; and other interested parties not included in the other categories. For more information and to apply, please contact Jen Padgett at jpadgett@nfrc.org.
