An Act relative to the electrification of new and substantially remodeled or rehabilitated building

This bill requires all new commercial buildings and major renovations (affecting 50%+ of floor space) to use electricity instead of fossil fuels for heating, cooling, cooking, and clothes drying starting January 1, 2025. It sets specific greenhouse gas emission limits for biolabs (net zero by 2050) and hospitals (phased annual targets from 2025-2049), with biolabs needing non-fossil fuel HVAC systems meeting a minimum efficiency standard. Exemptions include freestanding appliances, emergency generators, and certain hot water systems where electric alternatives are cost-prohibitive. The Department of Energy Resources will create implementation rules, and waivers may be granted for impractical compliance.