May 21, 2026
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 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.
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.
About the National Fenestration Rating Council
Founded in 1989, NFRC is a nonprofit organization that administers a voluntary, uniform rating, labeling, and certification system for the energy performance of windows, doors, curtain walls, skylights, and other fenestration products. Its participants and members include manufacturers, suppliers, utilities, consumer groups, representatives from the building and code industries, scientific and educational organizations, and government agencies. For more information, visit nfrc.org.
Media Contact: Renee Vary, rvary@nfrc.org
Feb 20, 2026
GREENBELT, MD (February 20, 2026) – The National Fenestration Rating Council (NFRC) Board of Directors has approved six NFRC documents, now open for public review in accordance with the American National Standards Institute’s (ANSI) process. The public review and comment period will run from February 20 through April 6, 2026.
The documents submitted for public review, comment, and the full ANSI consensus process are:
- NFRC 100-2026[E0A0]: Procedure for Determining Fenestration Product U-factors
- NFRC 200-2026[E0A0]: Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence
- NFRC 202-2026[E0A0]: Procedure for Determining Translucent Fenestration Product Visible Transmittance at Normal Incidence
- NFRC 203-2026[E0A0]: Procedure for Determining Visible Transmittance of Tubular Daylighting Devices
- NFRC 400-2026[E0A0]: Procedure for Determining Fenestration Product Air Leakage
- NFRC 500-2026[E0A0]: Procedure for Determining Fenestration Product Condensation Index Ratings
The documents, with changes from previous versions highlighted in markup format, are available here: NFRC Documents in Public Review. The documents will appear in the Standards Action on February 20, 2026, marking the beginning of the 45-day open public comment period.
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.
About the National Fenestration Rating Council
Founded in 1989, NFRC is a nonprofit organization that administers a voluntary, uniform rating, labeling, and certification system for the energy performance of windows, doors, curtain walls, skylights, and other fenestration products. Its participants and members include manufacturers, suppliers, utilities, consumer groups, representatives from the building and code industries, scientific and educational organizations, and government agencies. For more information, visit nfrc.org.
Media contact: Renee Vary, rvary@nfrc.org
May 2, 2025
GREENBELT, MD (May 2, 2025) – The National Fenestration Rating Council (NFRC) Board of Directors approved two NFRC documents which are now open for public review according to the American National Standards Institute’s (ANSI) process. The public review and comment period is scheduled to run from May 2 through June 16, 2025.
The two documents submitted for public review, comment, and the full ANSI consensus process are:
- NFRC 100-2023[E0A4]: Procedure for Determining Fenestration Product U-Factor
- NFRC 200-2023[E0A5]: Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence
The documents up for review (with changes from previous versions shown in underline/strikethrough format) are available here: NFRC Documents in Public Review. These documents appeared in the Standards Action on May 2, 2025, marking the beginning of the 45-day open public comment period ending June 16, 2025.
All changes subject to public review have been previously balloted and approved by NFRC membership and the Board of Directors. As an ANSI-Accredited Standards Developer, NFRC submits any NFRC document that it wishes to become an ANSI Standard, as well as any proposed amendments or modifications, for public review and comment in accordance with 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
- Other interested parties not included in the other categories
For more information and to apply, please contact Jen Padgett at jpadgett@nfrc.org.
About the National Fenestration Rating Council
Founded in 1989, NFRC is a nonprofit organization that administers a voluntary, uniform rating, labeling, and certification system for the energy performance of windows, doors, curtain walls, skylights, and other fenestration products. Its participants and members include manufacturers, suppliers, utilities, consumer groups, building and code industry representatives, scientific and educational organizations, and government agencies. For more information, visit nfrc.org.
Contact: Renee Vary, 240-821-9509, rvary@nfrc.org
###
