This Small City Found the Funds for Clean Heat — Episode 275

New Haven is developing a municipally led district geothermal network to decarbonize heating and cooling for Union Station and a large Housing Authority redevelopment adjacent to the station. Steven Winter—the city’s Executive Director of Climate and Sustainability and a state legislator—explained that an EPA Climate Pollution Reduction Grant (implementation) awarded in 2024 seeded the project. The near‑term build will directly serve about 300 units in the first building and ~400 in the second (≈750 units), with a long‑term aspiration to scale to as many as 2,500 units. The roughly $16 million project targets the federal commercial geothermal investment tax credit (extended through 2032) to cover about 40% of costs; to capture the full credit value, New Haven plans a Green Bank bridge loan rather than borrowing directly as a municipality, avoiding a 15% “haircut.”

Farrell and Winter move from high‑level goals into engineering and practical realities. Winter described the system: ~6‑inch boreholes spaced ~25 ft apart, circulating a water/glycol loop through plate heat exchangers that feed in‑building heat pumps. Two test bores — 850 ft and 1,250 ft — informed the choice to build deeper, fewer bores because bedrock deepens closer to Long Island Sound. He emphasized thermal balance (so the ground isn’t gradually warming or cooling), pump house siting, lifecycle replacement budgets (pumps ~15–20 years), and the need for legal and tax accounting expertise to secure credits. On governance, New Haven is pursuing a municipally owned utility model (citing Richmond, B.C.’s Alexandra District Energy Utility) because Connecticut does not currently authorize gas utilities to operate thermal networks. Winter also outlined policy work at the state level: authorization exists for a DEEP thermal grant and loan program but requires funding to mirror New York/Massachusetts/Colorado models. The episode closes with lessons for other communities—expect high retrofit costs (favor new construction anchors), coordinate tightly with building and streetscape plans, and consider alternative heat sources like sewer heat—while noting the project’s potential to deliver predictable, lower operating costs and local control over clean heating and cooling.