Code of Massachusetts Regulations
225 CMR - DEPARTMENT OF ENERGY RESOURCES
Title 225 CMR 23.00 - Massachusetts Front-end Amendments to the International Energy Conservation Code 2021 Massachusetts Stretch Energy Code - 2023 Commercial Amendments to IECC2021
Chapter 5 - [CE] EXISTING BUILDINGS
Section CC103 - ZERO ENERGY PATHWAY MINIMUM RENEWABLE ENERGY

CC103.1 Modify Section CC103.1 as follows (keeping Table CC103.1 unchanged):

Delete "or off-site renewable energy shall be procured"

Equation CC-1 Replace Equation CC-1 with the following:

REonsite >= Ebuilding (Equation CC-1)

where:

REonsite = Annual site energy production from on-site renewable energy systems (Section CC103.2).

Ebuilding = Building energy use without consideration of renewable energy systems, on-site energy storage, on-site back-up generators, or on-site refuelling of vehicles or outdoor equipment.

When Section C401.2.1(1) is used for compliance with the Section CC101.4, building energy shall be determined by multiplying the gross conditioned floor area plus the gross semiheated floor area of the proposed building by an EUI selected from Table CC103.1. Use a weighted average for mixed-use buildings.

When any compliance pathway other than Section C401.2.1 Part 1 is used for compliance with CC101.4, building site energy use shall be determined from energy simulations.

CC103.2 Modify Section CC103.2 as follows:

After "approved by the code official" add "Commercial R-use buildings may comply using the Zero Energy Buildings pathways in Appendix RC by certifying that all units meet HERS 0 or lower with on-site renewable generation or by following the on-site renewable energy calculation used in the Phius ZERO certification standard when following the Passive house compliance pathway."

CC103.3 Delete this section