H.R. 4308 extends the Energy Efficiency and Conservation Block Grant Program, which provides federal funding to states and communities for energy-saving projects, through 2030. The bill expands the program's focus to include alternative fuels and new energy technologies such as distributed energy resources, district heating and cooling systems, and alternative fuel infrastructure. It authorizes $3.5 billion annually from fiscal year 2026 through 2030—totaling $17.5 billion over five years—with up to 1 percent of those funds available for administrative costs. The legislation affects state and local governments that receive these grants to support energy efficiency upgrades in buildings and communities. The bill was introduced by a bipartisan group of House members and referred to the Committee on Energy and Commerce in July 2025.