The public review and comment period is now open for NFRC 200-2023[E0A6]: Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence. The review is in accordance with the American National Standards Institute’s (ANSI) process, after the National Fenestration Rating Council (NFRC) board of directors approved the document, NFRC officials said.
The document, with changes from previous versions highlighted in markup format, is available on NFRC’s website, after appearing in the Standards Action on August 8, 2025, marking the beginning of the 45-day comment period.
All changes subject to public review have been previously balloted and approved by NFRC membership and its board of directors.
The NFRC Standards Committee oversees the review process, requiring the balanced participation of a variety of stakeholders. The committee is currently seeking a new member in the General Interest category, including: 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.
The review and comment period is open through September 22, 2025.