PUBLIC COMMENT Addendum 90f amends service water heating, clothes washer/dryer, and dishwasher modeling criteria for multi-family Dwelling Units and modifies corresponding criteria for single-family Dwelling Units. The addendum also clarifies the linkage of Standard 301-2022 Appendix C software modeling criteria to the Infiltration Volume as determined in accordance with ANSI/RESNET/ICC 380. When finalized, Addendum 90f will replace Addendum 90i that is currently in effect. The draft addendum, comment form, and comments received are posted at Draft PDS-02 HERS Standards Addendum 90f, Hot Water Modeling. Public comments will be accepted from October 1, 2025, through October 31, 2025.
