225 CMR, § 22, § RC101

Current through Register 1538, January 3, 2025

Section RC101 - COMPLIANCE

RC101 Replace Section RC101 as follows:

RC101.1Compliance. Existing residential buildings shall comply with Chapter 5 of the stretch energy code. New residential buildings shall be Net Zero Buildings and comply with Section R404.4 (EV wiring) and either Section R405 (Passivehouse) or Section R406 (HERS) in accordance with RC101.2, as well as one of the following Specialized code pathways:

1. Section RC102 Zero Energy pathway

2. Section RC103 All-Electric pathway

3. Sections RC104 and RC105 Mixed-Fuel pathway.

RC101.2Application. New dwelling units over 4,000 square feet in conditioned floor area shall comply with either RC101.1 option 1. Zero Energy Pathway or option 2. All-Electric Pathway, and follow either Section RC102 or Section RC103.

R-use buildings with total conditioned floor area greater than 12,000 square feet shall comply with the provisions of Section R405 Passivehouse Building Certification Option, and any of the pathways in Section RC101.1.

RC101.3Definitions.

NET ZERO BUILDING. A building which is consistent with achievement of MA 2050 net zero emissions, through a combination of highly energy efficient design together with being either a Zero Energy Building, or an All-electric Building, or where fossil fuels are utilized, a building fully pre-wired for future electrification and that generates solar power on-site from the available Potential Solar Zone Area.

ZERO ENERGY BUILDING. A building which through a combination of highly energy efficiency design and onsite renewable energy generation is designed to result in net zero energy consumption over the course of a year as measured in MMBtus or KWheq, on a site energy basis, excluding energy use for charging vehicles.

225 CMR, § 22, § RC101

Adopted by Mass Register Issue 1485, eff. 12/23/2022.