The commissioner may, by regulation, update energy efficiency standards for the types of new products set forth in clauses (f) to (y), inclusive, of section 3. Any revision of such efficiency standards shall be based upon the determination of the commissioner; provided, however, that a revision of said efficiency standards for electric vehicle supply equipment may allow the use of equipment that consumes additional kilowatts per hour. Any standard revised pursuant to this section which conflicts with a corresponding standard in the state plumbing code shall take precedence over the standard in said state plumbing code. Any standard revised pursuant to this section shall not take effect for at least 1 year after its adoption.

1. (1) New medium voltage dry-type distribution transformers, single voltage external AC to DC power supplies, and state-regulated incandescent reflector lamps manufactured on or after January 1, 2008, shall not be sold or offered for sale in the commonwealth unless the efficiency of the new product meets or exceeds the efficiency standards set forth in 225 CMR 9.03.
2. (2) Metal halide lamp fixtures designed to be operated with lamps rated greater than or equal to 150 watts but less than or equal to 500 watts shall not contain a probe-start metal halide ballast.
3. (3) Residential furnaces or boilers shall meet or exceed the following Annual Fuel Utilization Efficiency (AFUE):

The regulations shall provide for the following minimum efficiency standards: