Proposed Addendum 77 amends requirements of ANSI/RESNET/ICC 301 to improve the assessment of Heat Pump Water Heater (iHPWH) performance when they are located in small, confined spaces that may degrade their rated performance. The addendum adds definitions, establishes requirements for rating software, and adds requirements for inspection of iHPWHs to Appendix B. Comments will be accepted on underlined and strike through text in red print within draft PDS-01. To review and comment on the Draft follow the links below. The public comment period begins April 29, 2026, and ends May 29, 2026. Register for the RESNET HERS Addendum 77 Q&A Webinar here! The webinar will occur on Wednesday, May 20, 2026, at 2:00 p.m. ET. To review the draft addendum, click on “VIEW DRAFT ADDENDUM HERE” below. To submit your comments, click on “SUBMIT COMMENTS HERE” below. Comments are posted online and you will be able to review comments by clicking on “VIEW COMMENTS HERE” below. When submitting a comment, you must close the page out and re-open it to view your comment. Refreshing the page will cause the comment to be submitted a second time. When posting a comment, please refrain from using your device’s autofill feature as this may prevent your comment from being submitted. VIEW DRAFT ADDENDUM HERE VIEW DRAFT ADDENDUM FOR Draft PDS-02, HERS Addendum 104, Appendix A Insulation Installation Grading Update To review the draft addendum, click on Draft PDS-04, HERS Addendum 77, Integrated Heat Pump Water Heater (iHPWH) Submit If you are human, leave this field blank. SUBMIT COMMENTS HERE The public comment period is closed. VIEW COMMENTS HERE Entry Date: May 29, 2026 at 5:37 PM Full Name: Bryan Ahee Affiliation: Bradford White Corporation Address: 200 Lafayette St Middleville, Michigan 49333-7048 Phone Number: 2697933364 Email: bahee@bradfordwhite.com Page Number: 6 Section/Table/Figure Number: Table Note v.3 Comment Intent: Objection Comment Type: Technical Comment and Proposed Change: Download Tips and Reminders for Submitting Public Comments Comments must pertain to the changes shown in the draft as either strike-through or underlined text in red print. Comments not on the changes under consideration will be rejected. Comments should include a specific proposed change to the text of the draft open for comment and an explanation sufficient for the review committees to understand the commenter’s concern or objection. Proposed added text must be underlined and text proposed to be removed must be shown using strike-through. If not submitted in this format, the public comment may be rejected. Do not submit comments on other chapters or on sections or proposed changes that are not identified as open for public comment by red print. Comments not on the proposal under consideration will be rejected. If you submit public comment representing the collective interests of a group of stakeholders, you are encouraged to submit ONE public comment and identify all stakeholders in that comment. While not required, this expedites the ability of the committees to respond to commenters in a timely manner. Public comments are reviewed by committees comprised of volunteer members, that are Raters, Providers, Software Developers and other industry and public interest stakeholders. They are not reviewed by RESNET Staff. Most amendments to RESNET standards are proposed by industry and public stakeholders not RESNET. To learn more about submitting proposed amendments visit this page: https://www.resnet.us/about/standards/submit-proposed-amendments/
