Subsection R401.2 - ApplicationResidential buildings shall comply with Section R401.2.5 and either Sections R401.2.1, R401.2.2, R401.2.3 or R401.2.4.
Exception: Additions, alterations, repairs and changes of occupancy to existing buildings complying with Chapter 5.
R401.2.1Prescriptive Compliance Option.The Prescriptive Compliance Option requires compliance with Sections R401 through R404.
R401.2.2Passivehouse Building Certification Option.The Passivehouse Building Certification Option requires compliance with Section R405.
R401.2.3Energy Rating Index Option.The Energy Rating Index (ERI) Option requires compliance with Section R406. Qualifying approaches under R406 include the following:
a. Certified RESNET HERS rating with MA amendments.R401.2.4APPENDIX RC. Residential Buildings and dwelling units covered by this chapter may elect to comply with the requirements of IECC Appendix RC - ZERO ENERGY RESIDENTIAL BUILDING PROVISIONSR401.2.5MA Stretch energy code. Residential Buildings and dwelling units may elect to comply with the requirements of 225 CMR MASSACHUSETTS STRETCH ENERGY CODE, or, the MUNICIPAL OPT-IN SPECIALIZED STRETCH ENERGY CODE promulgated by the Massachusetts Department of Energy Resources.R401.2.5Additional energy efficiency. This section establishes additional requirements applicable to all compliance approaches to achieve additional energy efficiency. 1. For buildings complying with Section R401.2.1, one of the additional efficiency package options shall be installed according to Section R408.2.2. For buildings complying with the Energy Rating Index alternative Section R401.2.3, the Energy Rating Index value shall be less than or equal to the HERS index of 52 prior to credit for onsite renewable electric generation or as specified in Table R406.5. The option selected for compliance shall be identified in the certificate required by Section R401.3.
780 CMR, ch. 51, ch. 4, R401, R401.2
Amended by Mass Register Issue 1532, eff. 10/11/2024.