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

This bill requires that new and substantially remodeled commercial buildings in Massachusetts use electricity instead of fossil fuels for heating, cooling, cooking, and clothes drying. It specifically mandates that new hospitals and biological research laboratories achieve net-zero carbon emissions by 2050 and sets a phased schedule of decreasing emission limits for these facilities through 2049. The legislation also establishes specific heating requirements for labs and hospitals, ensuring their primary heating systems do not rely on on-site fossil fuel combustion. Additionally, the bill directs the Department of Energy Resources to create regulations for compliance, including the use of renewable energy credits, while allowing municipalities to set separate rules for existing facilities.