Public Comment on Proposed Addenda: Draft PDS-02 BSR/RESNET/ICC 301-2022 Addendum B-202x, CO2e Index and Draft PDS-03 MINHERS® Addendum 66f, CO2e Index PDS-02 BSR/RESNET/ICC 301-2022 Addendum B-202x, CO2e Index Proposed Standard BSR/RESNET/ICC 301-2022 Addendum B-202x amends the 2022 edition of Standard 301 to modify the criteria for calculation of the CO2e Index. The CO2 Index was established by standard ANSI/RESNET/ICC 301-2019 Addendum D which was then incorporated into Standard 301-2022 along with other Standard 301-2019 addenda. New versions of the databases referenced by Standard 301-2019 Addendum D were released after it was approved so the Index calculation sections are being revised by BSR/RESNET/ICC 301-2022 Addendum B-202x to update the references and clarify their use. (Note: Standard 301-2019 recently became the basis for calculating RESNET HERS® Index ratings so Standard 301-2022 will not become the basis for the HERS® in the near term. MINHERS® Addendum 66 adopted the CO2 Index calculation and reporting criteria currently in effect for the HERS® including the updated referenced databases and the Index will be calculated and reported with the HERS® ratings when rating software is updated. Standard 301-2022 Addendum B is intended to ensure that the criteria for the CO2e Index calculation are consistent with the criteria adopted by the MINHERS® Addendum 66 when the transition to the Standard 301-2022 based HERS® occurs in the future. Also note, the CO2e Index calculation utilizes data currently collected by raters and does not require collection of additional data.) The draft addendum, comment form, and comments received are posted at Draft PDS-02, BSR/RESNET/ICC 301-2022 Addendum B-202x, CO2e Index. Public comments will be accepted from August 12, 2022, through September 11, 2022. PDS-03 MINHERS® Addendum 66f, CO2e Index Addendum 66f will be the final consensus version of interim Addendum 66i that is currently in effect. Addendum 66 establishes the criteria for calculating and reporting of the CO2e Index within the RESNET HERS® and parallels the criteria of BSR/RESNET/ICC 301-2022 Addendum B-202x. The CO2e Index will be calculated by ANSI/RESNET/ICC 301-2019 based software and will be available for reporting when the software is updated. Reporting the CO2e Index will be voluntary until January 1, 2023, the Mandatory Compliance Date, after which reporting will be mandatory. The draft addendum, comment form, and comments received are posted at Draft PDS-03, MINHERS® Addendum 66f. Public comments will be accepted from August 12, 2022, through September 11, 2022.