District Energy Decarbonization Plans
At a glance
- What: plans by the two large Cambridge district energy operators to shift from gas to electric heat: Vicinity Energy (steam to Boston and Cambridge buildings) and MIT's campus system.
- Where it stands: presented to the Health and Environment Committee on Oct 20 as context for thermal network planning; no city action requested.
- Next: MIT proposed a delegation to Denmark to work out governance and owner-operator models; Vicinity's large heat pump is due online in 2028.
Vicinity Energy
- Serves about 71 million square feet through 29 miles of pipe; four of five skyline buildings.
- A 42 MW electric boiler has run since November 2024 and balances the grid at times of surplus power; a river-source heat pump (about 38 MW, described as the world's largest) is under construction for 2028; thermal storage is planned.
- Targets: about 40% decarbonized after the heat pump, over half by 2035; second heat pump and a harbor-source unit in design.
- Concern from Audrey Schulman: Vicinity is not regulated like a utility, so the city should bargain for long-term affordability when granting rights of way.
MIT
- District system of about 10 million square feet; heat pump plant in design to recover 30 to 40% of campus heat from its cooling system, with 60 to 70% expected from a shared Boston network. Also evaluating waste heat from its research reactor cooling loop and possible boreholes.
Sources
Discussion time
About 24 minutes across 1 meeting (from transcript timestamps; approximate).
| Meeting | Minutes |
|---|---|
| 2026-10-20 - Health and Environment Committee | 24 |
Log
- 2026-10-20 - 2026-10-20 - Health and Environment Committee — Vicinity and MIT presented decarbonization plans; follow-up questions on how fossil-free the new MIT buildings are, adoption speed and affordability.