Draft PDS-02, RESNET/ICC 301-2022 Addendum C-202x, Interim Updates

Proposed standard BSR/RESNET/ICC 301-2022 Addendum C-202x amends the 2022 edition of Standard 301 to provide clarifications and interim updates. The proposed revisions address the following major subjects and others: clarifications to improve the consistency of rating software calculations; definitions and acronyms for terms used in the Standard; new federal HVAC appliance SEER2 and HSPF2 ratings and ceiling fan ratings; the treatment of shared water heater losses for multi-family dwelling units; balanced mechanical ventilation; duct leakage where all ducts are within conditioned space; carbon dioxide index calculations; onsite battery storage; multiple end-use loads; interior shading; reporting of the edition of standard ANSI/RESNET/ICC 301 that rating calculations are compliant with, and; interpretations issued for ANSI/RESNET/ICC 301-2022.

The first draft, PDS-01 RESNET/ICC 301-2022 Addendum C-202x, was released for public review and comment and changes have been made in response to certain comments. This second draft, PDS-02, includes the changes to draft PDS-01 and are shown with strike through and underlined text in red print. Only the changes shown in draft PDS-01 by strike-through and underlined text in red print are open for comment.

Draft PDS-02 RESNET/ICC 301-2022 Addendum C-202x is submitted for public review and comment for 45 days, beginning May 3, 2024, and ending June 17, 2024.

To review the draft addendum click on Draft PDS-02, RESNET/ICC 301-2022 Addendum C-202x, Interim Updates

To submit your comments, click on “SUBMIT COMMENTS HERE” below.

Comments are posted in real time and you will be able to review comments by clicking on “VIEW COMMENTS HERE” below.

Submit your comment below for Draft PDS-02, RESNET/ICC 301-2022 Addendum C-202x, Interim Updates

Submit your comment below for Draft PDS-02, RESNET/ICC 301-2022 Addendum C-202x, Interim Updates


(who you represent)




Include your justification for proposed change to draft standard
Use "strike" and "underline" formatting and include the entire section/subsection to which changes are proposed

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Tips and Reminders for Submitting Public Comments 

  • Comments must pertain to text in draft PDS-01 that is shown as either strikethrough or underlined and red print. Comments on portions of draft PDS-01 where no change is indicated will be rejected.
  • Comments should include a specific proposed change to the text of the draft open for comment. 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 standards other than this one that is out for public comment.
  • 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 with 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/