Three (3) RESNET® HERS® Standards Addenda, which revise HERS Technical Standards (Chapter 3) and Quality Assurance (Chapters 1 & 9), become mandatory for homes and buildings with a Building Permit Date* on or after January 1, 2026: Summary of Changes: Addendum 67 – Chapter 1 QA Update Based on changes from Addendum 75, Addendum 67 similarly updates Chapter 1, ‘National Standard for Rating Quality Assurance Providers’, for consistency with Chapter 9. Addendum 75 – Chapter 9 QA Update Addendum 75 is a major update to the Quality Assurance standards for the RESNET HERS®. It establishes a more rigorous legal construct based on evolving experience with legal challenges to disciplinary actions. It also clarifies Remote QA Field Reviews. Addendum 85 – Chapter 3 Temporarily Converted Garages This Addendum provides specific rules for rating model homes which may have temporarily converted a garage for a sales or construction office. This allows the model home to be rated before the conversion of the space back to a garage. Raters will need to assess whether the space meets the new definition for Temporarily Converted Garage and potentially modify their blower door test procedure and how they enter this space into their rating software. Visit https://www.resnet.us/about/standards/ for information on current standards as well as those out for public comment, and historic standard information.
