An Act relative to a tactical transition to affordable, clean thermal energy

This bill requires Massachusetts gas companies to evaluate non-gas alternatives (like electrification) before expanding or replacing gas infrastructure. It prohibits gas companies from recovering costs for new gas projects unless they prove alternatives were considered and found unfeasible, and mandates a gradual shift in spending away from gas infrastructure replacement toward clean thermal energy projects by 2035. Gas and electric utilities must jointly create 5-year "tactical transition plans" to reduce emissions while maintaining affordability, including retiring gas pipes and installing clean energy systems. The bill also bans hydrogen injection into residential gas systems (except for specific industrial uses) and requires utilities to share costs for transitioning buildings to non-gas thermal energy. These changes directly affect gas utility companies, building owners, and ratepayers through their energy infrastructure and costs.