PUBLIC COMMENT: PDS-02 BSR/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: 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; other incidental updates. The draft addendum, comment form, and comments received are posted at Draft PDS-02, BSR/RESNET/ICC 301-2022 Addendum C-202x, Interim Updates. Public comments will be accepted from April 14, 2023, through May 15, 2023.
