HERS Standards are maintained on a continuous basis and updated with new editions every five (5) years. When addenda implementing amendments are added to an edition of the HERS they are integrated into an official version that is maintained to indicate up-to-date requirements. That version is currently referred to as the Continuous Maintenance Version. It is mobile friendly and may be accessed at https://standards.resnet.us/. RESNET® also maintains the formal editions of the HERS and the individual addenda to those editions including the adoption and implementation dates. See the links below for the HERS 2013 Edition and its addenda. RESNET STANDARDS HERS Standards – applicable to Ratings with Building Permit Dates on or after July 1, 2025 HERS Standards – applicable to Ratings with Building Permit Dates between January 1, 2025 and June 30, 2025 Mortgage Industry National Home Energy Rating Standards (Adopted January 1st, 2013) ADDENDA MANDATORY JULY 1, 2026 Addendum 88 – Modeling Software Training PDU Clarification – Mandatory July 1, 2026 Addendum 89f – Handheld Watt Meters – Mandatory July 1, 2026 (replaced Addendum 89i) Addendum 87 – Raters, RFIs, and Modelers who belong to Multiple QA Providers – Mandatory July 1, 2026 Addendum 86 – Training Provider and Training Program Oversight – Mandatory July 1, 2026 Addendum 84 – RFI Certification – Mandatory July 1, 2026 ADDENDA MANDATORY JANUARY 1, 2026 Addendum 85 – Temporarily Converted Garages – Mandatory January 1, 2026 Addendum 75 – Chapter 9 Update – Mandatory January 1, 2026 Addendum 67 – Chapter 1 Update – Mandatory January 1, 2026 ADDENDA MANDATORY JULY 1, 2025 Addendum 81 – Adoption of ANSI/RESNET/ICC 301-2022 Supplement – Mandatory July 1, 2025 Addendum 76 – HERS Update Adoption of ANSI/RESNET/ICC 301-2022 – Mandatory July 1, 2025 Addendum 46 – Chapter 6 Sampling Update – Mandatory July 1, 2025 ADDENDA MANDATORY MAY 29, 2025 Addendum 90i – Service Hot Water – Mandatory May 29, 2025 ADDENDA AUTHORIZED MARCH 30, 2025 Addendum 89i – Handheld Watt Meters – Authorized March 30, 2025 ADDENDA MANDATORY JANUARY 1, 2025 Addendum 80 – Graded Field Evaluations, Probationary Ratings and Probationary Models – Mandatory January 1, 2025 Addendum 78f – Sampling – Mandatory January 1, 2025 (replaced Addendum 78i) ADDENDA AUTHORIZED DECEMBER 20, 2024 Addendum 83i – CMU Insulation Grading and R-values – Authorized December 20, 2024 ADDENDA AUTHORIZED APRIL 28, 2024 Addendum 78i – Sampling – Authorized April 28, 2024 ADDENDA MANDATORY JANUARY 1, 2024 Addendum 79f – Table 5.1.2(1) Informative Note Correction – Mandatory January 1, 2024 Addendum 74 – Space Constrained AC or Heat Pump – Mandatory January 1, 2024 Addendum 73f – Remote Proctored Exams – Mandatory January 1, 2024 (replaced Addendum 73i) ADDENDA MANDATORY JULY 1, 2023 Addendum 68 – HERS Modeler Professional Development Course Requirements – Mandatory July 1, 2023 Addendum 62f – Provider Disciplinary Actions and Appeals Procedures – Mandatory July 1, 2023 (replaced Addendum 62i) ADDENDA AUTHORIZED MAY 7, 2023 Addendum 73i – Remote Proctored Exams – Authorized May 7, 2023 ADDENDA AUTHORIZED FEBRUARY 10, 2023 Addendum 71f – SEER2 and HSPF2 Conversions – Authorized February 10, 2023 (replaced Addendum 71i) ADDENDA MANDATORY JANUARY 1, 2023 Addendum 65f – HERS® Ratings for Third Party EEPs, RECs Ownership Status, MF Ratings – Mandatory January 1, 2023 (replaced Addendum 65i) Addendum 69 – Combustion Safety Training for RFI Certifying as HERS® Rater – Mandatory January 1, 2023 ADDENDA AUTHORIZED DECEMBER 4, 2022 Addendum 71i – SEER2 and HSPF2 Conversions – Authorized December 4, 2022 ADDENDA AUTHORIZED OCTOBER 28, 2022 Addendum 62i – Provider Disciplinary Actions and Appeals Procedures – Authorized October 28, 2022 ADDENDA MANDATORY OCTOBER 21, 2022 Addendum 66f – CO2e Index – Mandatory October 21, 2022 (replaced Addendum 66i) ADDENDA MANDATORY JULY 1, 2022 Addendum 64f – Multi-Family Sampling – Mandatory July 1, 2022 (replaced Addendum 64i) Addendum 63 – Training Period Expiration – Mandatory July 1, 2022 Addendum 61f – Exception for Onsite Leakage Testing During COVID-19 Pandemic – Mandatory July 1, 2022 (replaced Addendum 61i) Addendum 60 – Combustion Safety Field Training – Mandatory July 1, 2022 Addendum 58f – Pre-Drywall Inspection QA – Mandatory July 1, 2022 (replaced Addendum 58i) Addendum 56 – HERS® Modeler QA – Mandatory July 1, 2022 Addendum 54 – HVAC System Installation Grading QA – Mandatory July 1, 2022 ADDENDA AUTHORIZED MARCH 4, 2022 Addendum 66i – Interim Addendum, CO2 Index – Authorized March 4, 2022 (Replaced by Addendum 66f – CO2e Index) ADDENDA AUTHORIZED JANUARY 31, 2022 Addendum 65i – Interim Addendum, HERS® Ratings for Third Party EEPs, RECs Ownership Status, MF Ratings – Authorized January 31, 2022 ADDENDA AUTHORIZED JANUARY 3, 2022 Addendum 64i – Interim Addendum, Multi-Family Sampling – Authorized January 3, 2022 ADDENDA MANDATORY JANUARY 1, 2022 Addendum 59 – Include Modeling Skills in HERS® Rater Capabilities & Recertification – Mandatory January 1, 2022 Addendum 53f – (final for 53i and 55i) Modifications to ANSI/RESNET/ICC 301-2019 for Consistency of HERS® Index Calculations – Mandatory January 1, 2022 (replaced Addendum 53i) Addendum 50 – HERS® Modeler – Mandatory January 1, 2022 Addendum 42 – Adoption of Standards ANSI/RESNET/ICC 301-2019 and ANSI/RESNET/ICC 380-2019 – Mandatory January 1, 2022 ADDENDA AUTHORIZED OCTOBER 19, 2021 Addendum 61i – Interim Addendum, Exception for Onsite Leakage Testing During COVID-19 Pandemic – Authorized October 19, 2021 ADDENDA MANDATORY JULY 1, 2021 Addendum 52f – Eligibility to Grade HVAC Systems – Mandatory July 1, 2021 (replaced Addendum 52i) Addendum 45 – Chapters 1 & 2 and Appendix B 2020 Updates – Mandatory July 1, 2021 Addendum 37 – QAD, Rating Quality Assurance Provider and Training Provider Disciplinary Actions – Mandatory July 1, 2021 ADDENDA AUTHORIZED JUNE 13, 2021 Addendum 58i – Interim Addendum, Pre-Drywall Inspection QA – Authorized June 13, 2021 ADDENDA AUTHORIZED JANUARY 22, 2021 Addendum 55i – Interim Addendum, Modifications and Clarifications for Implementation of ANSI/RESNET/ICC 301-2019 – Authorized January 22, 2021 ADDENDA MANDATORY JANUARY 1, 2021 Addendum 34 – QA Datafile– Mandatory January 1, 2021 ADDENDA AUTHORIZED OCTOBER 13, 2020 Addendum 53i – Equipment Efficiency and Sizing, and Clarifications of Standard 301-2019 – Authorized October 13, 2020 ADDENDA MANDATORY SEPTEMBER 10, 2020 Addendum 47f – Test Exception for Ducts in Conditioned Space – Mandatory September 10, 2020 (replaced Addendum 47i) ADDENDA AUTHORIZED AUGUST 16, 2020 Addendum 52i – Eligibility to Grade HVAC Systems – Authorized August 16, 2020 ADDENDA MANDATORY JULY 6, 2020 Addendum 49i – Interim Credits for HVAC Installation Quality Grading – Authorized July 6, 2020 (replaced July 21, 2020 by ANSI/RESNET/ICC 301-2019 Addendum B-2020 changes) ADDENDA MANDATORY JULY 1, 2020 Addendum 30- Quality Assurance – Mandatory July 1, 2020 ADDENDA AUTHORIZED JUNE 25, 2020 Addendum 51i – Internal Gains for Energy Rating Reference Homes – Authorized June 25, 2020 (replaced July 21, 2020 by ANSI/RESNET/ICC 301-2019 Addendum B-2020 changes) ADDENDA AUTHORIZED APRIL 20, 2020 Addendum 48i – COVID-19 Pandemic Exception for Onsite Airtightness Tests – Authorized April 20, 2020 ADDENDA MANDATORY APRIL 5, 2020 Addendum 47i – Test Exception for Ducts in Conditioned Space – Mandatory April 5, 2020 ADDENDA MANDATORY JANUARY 1, 2020 Addendum 43 – Implementation of MINHERS® Standards – Mandatory January 1, 2020 ADDENDA MANDATORY JULY 1, 2019 Addendum 41f- Final Addendum, “Tropical Climate Zone” and “Living Space” Definitions; Time-limited Leakage Testing Exception for Puerto Rico and US Virgin Islands – Mandatory July 1, 2019 (replaced Addendum 41i) Addendum 39- Non-Measured Ventilation Airflow and Ventilation Fan Wattage Defaults – Mandatory July 1, 2019 Addendum 36 – Rater Recertification and HESP Elimination – Mandatory July 1, 2019 ADDENDA MANDATORY MARCH 21, 2019 Addendum 41i- Interim Addendum, Time-limited Leakage Testing Exception for Puerto Rico and US Virgin Islands – Mandatory March 21, 2019 ADDENDA MANDATORY JANUARY 20, 2019 Addendum 40f- Final Addendum, Ethics Appeal Panel – Mandatory January 20, 2019 (replaced Addendum 40i) ADDENDA MANDATORY JANUARY 1, 2019 Addendum 32f- Final Addendum, MINHERS® Standards Revisions and Amendments – Mandatory January 1, 2019 (replaced Addendum 32i) Addendum 29- Quality Assurance Designee – Mandatory January 1, 2019 ADDENDA MANDATORY NOVEMBER 11, 2018 Addendum 35 Software Accreditation – Mandatory November 11, 2018 ADDENDA MANDATORY OCTOBER 26, 2018 Addendum 40i- Interim Addendum, Ethics Appeal Panel – Mandatory October 26, 2018 ADDENDA MANDATORY SEPTEMBER 8, 2018 Addendum 33 Practical Experience for QAD Certification – Mandatory September 8, 2018 ADDENDA MANDATORY APRIL 12, 2018 Addendum 31f- Final Addendum, Chapter 2 Rescind Rater Simulation Practical Test for Certified Raters – Mandatory April 12, 2018 (replaced Addendum 31i) ADDENDA MANDATORY FEBRUARY 14, 2018 Addendum 27- HERS® Scope, Definitions and 4 Story Dwelling Ratings – Mandatory February 14, 2018 ADDENDA MANDATORY FEBRUARY 5, 2018 Addendum 32i- Interim Addendum, Chapter 5 Addendum Effective Dates and Transition Period – Mandatory February 5, 2018 ADDENDA MANDATORY JANUARY 1, 2018 Addendum 26- Chapter 1, 2 & 3 CAS Hazard, Probationary Ratings and Reference Standards – Mandatory January 1, 2018 Addendum 20- Adoption of Standard ANSI/RESNET/ICC 380-2016 and Addenda – Mandatory January 1, 2018 (Adopted Nov 2016 and Mandatory Compliance delayed until Jan 2018.) ADDENDA MANDATORY DECEMBER 11, 2017 Addendum 31i- Interim Addendum, Chapter 2 Rescind Rater Simulation Practical Test for Certified Raters – Mandatory December 11, 2017 ADDENDA MANDATORY JUNE 28, 2017 Addendum 28i- Interim Addendum, Appendix B Confirmed Threshold Rating Definition – Mandatory June 28, 2017 (replaced by ANSI/RESNET/ICC 301-2014 Addendum R-2018) ADDENDA MANDATORY APRIL 28, 2017 Addendum 25f- Final Addendum, Chapter 2 Recertification – Mandatory April 28, 2017 (replaced Addendum 25i) ADDENDA MANDATORY FEBRUARY 16, 2017 Addendum 24- Chapter 2 Training and Certification – Mandatory February 16, 2017 Addendum 23- Chapters 2 & 3 Reference Standards and Scope – Mandatory February 16, 2017 Addendum 22- Chapter 1 Software Accreditation – Mandatory February 16, 2017 Addendum 21- Chapter 1 Rating Software Changes (Persistence) – Mandatory February 16, 2017 Addendum 19f- Final Addendum, Chapter 2 Rating Field Inspector Evaluation – Mandatory February 16, 2017 (replaced Addendum 19i) ADDENDA MANDATORY FEBRUARY 7, 2017 Addendum 25i- Interim Addendum, Chapter 2 Recertification – Mandatory February 7, 2017 ADDENDA MANDATORY OCTOBER 25, 2016 Addendum 19i- Interim Addendum, MINHERS® Chapter 2-2013 Addendum x-2016 Rating Field Inspector Evaluation – Mandatory October 25, 2016 ADDENDA MANDATORY OCTOBER 15, 2016 Addendum 18f- Final Addendum, Ethics Appeals – Mandatory October 15, 2016 (replaced Addendum 18i) ADDENDA MANDATORY JULY 28, 2016 Addendum 17f- Final Addendum, Ratings of Energy Star Certified Multi-Family Dwelling Units in 4 & 5 Story Buildings and Innovative Design Request Definitions – Mandatory July 28, 2016 (replaced Addendum 17i) ADDENDA MANDATORY JUNE 14, 2016 Addendum 18i- Interim Addendum, Ethics Appeals – Mandatory June 14, 2016 ADDENDA MANDATORY DECEMBER 4, 2015 Addendum 17i- Interim Addendum, Revision for Ratings of Energy Star Certified Multi-Family Dwelling Units in 4 & 5 Story Buildings and Innovative Design Request Definitions – Mandatory December 4, 2015 ADDENDA MANDATORY NOVEMBER 14, 2015 Addendum 16f- Final Addendum, Revision of Effective Dates for Raters Passing The Rater Simulation Practical Test – Mandatory November 14, 2015 (replaced Addendum 16i) ADDENDA MANDATORY JULY 1, 2015 Addendum 15- Revision of Onsite Quality Assurance Reviews – Mandatory July 1, 2015 ADDENDA MANDATORY JANUARY 1, 2016 Addendum 14- Revision on Assessment and Certification of Rating Field Inspectors – Mandatory for New Candidates July 1, 2015; for Currently Certified RFI- January 1, 2016 ADDENDA MANDATORY JUNE 5, 2015 Addendum 16i- Interim Amendment, Revision Of Effective Dates For Raters Passing The Rater Simulation Practical Test – Mandatory June 5, 2015 ADDENDA MANDATORY DECEMBER 31, 2014 Addendum 13- Revision to RESNET CAZ Standards – Mandatory December 31, 2014 ADDENDA MANDATORY NOVEMBER 29, 2014 Addendum 7- Revision to RESNET National Rating Technical Standard – Mandatory November 29, 2014 ADDENDA MANDATORY NOVEMBER 7, 2014 Addendum 12- Revision of Petition for Stay of Action and Revision to RESNET to QA Provider Challenge the Findings of a RESNET Quality Assurance Review – Mandatory November 7, 2014 ADDENDA MANDATORY OCTOBER 24, 2014 Addendum 11- Revision to Multifamily Rating Quality Assurance Reviews – Mandatory October 24, 2014 ADDENDA MANDATORY OCTOBER 17, 2014 Addendum 6-Revision to RESNET Quality Assurance Standards – Mandatory October 17, 2014 ADDENDA MANDATORY SEPTEMBER 28, 2014 Addendum 10- Removal of References to Comprehensive Home Energy Raters and Building Performance Auditors – Mandatory September 28, 2014 ADDENDA MANDATORY SEPTEMBER 18, 2014 Addendum 9- Revision to RESNET Energy Smart Education and Qualification Provider Accreditation – Mandatory September 18, 2014 ADDENDA MANDATORY SEPTEMBER 28, 2013 Addendum 5-Revision of RESNET National Building Registry – Mandatory September 28, 2013 Addendum 4-Revision of RESNET Discipline and Appeals Procedures ADDENDA MANDATORY SEPTEMBER 8, 2013 Addendum 3-Incorporation of RESNET National Building Registry – Mandatory September 8, 2013 Addendum 2- Revision of Gas Leakage Testing Standard Addendum 1-Revisions to RESNET Training and Certification Standard
