225 CMR, § 22, ch. 2, § R202 - GENERAL DEFINITIONS

R202 Add the following definitions:

ALL-ELECTRIC BUILDING. A building with no on-site combustion equipment for fossil fuel use or capacity including fossil fuel use in space heating, water heating, cooking, or drying appliances.

CLEAN BIOMASS HEATING SYSTEM. Wood-pellet fired central boilers and furnaces where the equipment has a thermal efficiency rating of 85% (higher heating value) or greater; and a particulate matter emissions rating of no more than 0.08 lb PM₂.₅/MMBtu heat output.

COMBUSTION EQUIPMENT. Any equipment or appliance used for space heating, service water heating, cooking, clothes drying and/or lighting that can use fuel gas, fuel oil or solid fuel and that is not a clean biomass heating system.

ELECTRIC VEHICLE. An automotive-type vehicle for on-road use, such as passenger automobiles, buses, trucks, vans, neighborhood electric vehicles, electric motorcycles, and the like, primarily powered by an electric motor that draws current from a rechargeable storage battery, fuel cell, photovoltaic array, or other source of electric current.

Informational Note: defined as in 527 CMR 12.00: Massachusetts Electrical Code (Amendments) section 625.2.

ELECTRIC VEHICLE SUPPLY EQUIPMENT (EVSE). The conductors, including the ungrounded, grounded, and equipment grounding conductors, and the Electric Vehicle connectors, attachment plugs, and all other fittings, devices, power outlets, or apparatus installed specifically for the purpose of transferring energy between the premises wiring and the Electric Vehicle.

Informational Note: defined as in 527 CMR 12.00: Massachusetts Electrical Code (Amendments) section 625.2

ELECTRIC VEHICLE READY PARKING SPACE ("EV Ready Space"). A designated parking space which is provided with wiring and electrical service sufficient to provide AC level II or equivalent EV charging, as defined by Standard SAE J1772 or SAE J3400 for EVSE servicing light duty Electric Vehicles.

ENTHALPY RECOVERY RATIO. The ratio of change in enthalpy of the entering supply airflow and the leaving supply airflow to the difference in enthalpy between the outdoor air entering supply airflow and the entering exhaust, airflow, with no adjustment to account for that portion of the psychrometric change in the leaving supply airflow that is the result of leakage of entering exhaust airflow rather than exchange of heat or moisture between the airstreams.

HIGH-EFFICACY LAMPS. Light-emitting diode (LED) lamps with an efficacy of not less than the following:

1. 60 lumens per watt for lamps over 40 watts.

2. 50 lumens per watt for lamps over 15 watts to 40 watts.

3. 45 lumens per watt for lamps 15 watts or less.

MIXED-FUEL BUILDING. A building that contains combustion equipment or includes piping for such equipment.

POTENTIAL SOLAR ZONE AREA. The combined area of any low-sloped roofs and any steep-sloped roofs oriented between 90 degrees and 300 degrees of true north where the annual solar access is 70 % or greater. Annual solar access is the ratio of "annual solar insolation with shade" to the "annual solar insolation without shade". Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.

SENSIBLE RECOVERY EFFICIENCY. The net sensible energy recovered by the supply airstream as adjusted by any supply fan energy, energy consumption of other equipment transferring heat to/from the supply airstream, case heat loss or heat gain, air leakage, airflow mass imbalance between the two airstreams, and the energy used for defrost, as a percent of the sum of the potential sensible energy that could be recovered from ambient conditions, the exhaust fan energy, and the energy consumption of any other equipment transferring heat to/from the exhaust airstream.

Notes

225 CMR, § 22, ch. 2, § R202

Adopted by Mass Register Issue 1485, eff. 12/23/2022. Amended by Mass Register Issue 1541, eff. 2/14/2025.