Code of Massachusetts Regulations
225 CMR - DEPARTMENT OF ENERGY RESOURCES
Title 225 CMR 22.00 - Massachusetts Stretch Code and Specialized Code 213 For Low-rise Residential
Chapter 5 - [RE] EXISTING BUILDINGS
Section RC103 - ALL ELECTRIC PATHWAY

Current through Register 1531, September 27, 2024

RC103 Add Section RC103 and Table RC103.2 as follows:

RC103.1 General. New all electric buildings shall comply with Section R401.2.5 and either Section RC103.2 to demonstrate a certified final HERS rating of 45 or less, or Section R405 and be pre-certified to the PHI or Phius CORE standard.

All new buildings shall comply with Appendix RB solar ready provisions and Section R404.4 Wiring for Electric Vehicle Charging Spaces

RC103.2 All Electric HERS Rating Index Score. Compliance with this section requires that the rated design be shown to have a certified HERS Index score less than or equal to the values in Table RC 103.2 when compared to the HERS reference design determined in accordance with RESNET/ICC 301 and the following:

1. HERS value not including on-site power production (OPP) calculated in accordance with RESNET/ICC 301.

TABLE RC103.2 MAXIMUM HERS RATING INDEXa

FUEL USAGE

ENERGY RATING INDEX NOT INCLUDING OPP

All Electric

45

a The building shall meet the requirements of Table R406.2, and the building thermal envelope shall be greater than or equal to the levels of efficiency and SHGC in Table R402.1.2 or R402.1.3.

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