Seed · Climate tech

Reservoir raises $8m seed to expand predictive water-heater installations

Reservoir makes and installs predictive all-electric water heaters designed to serve homeowners and respond to energy needs.

Reservoir, the trading name of Carnot Labs, combines a predictive water heater with direct installation and service for homeowners.

More installations, better demand prediction

Reservoir had installed nearly 100 units around Boston at the announcement. The funding will support more installations locally and in new cities, while data from different homes and usage patterns helps refine its prediction models.

The company designs, builds and installs its own equipment and plans to train apprentices on both plumbing and smart hardware. Its heaters anticipate household demand and can store heat produced when power is cheaper or renewable generation is abundant.

Use of funds

Expand installations in Boston and new cities, refine prediction models, and train installation apprentices.

Funding history

Seed · This round$8M

Sources

  1. Reservoir raises $8M to make water heaters that people — and the grid — will actually want | TechCrunchtechcrunch.com · Aug 12, 2026
  2. startupdb.com
  3. Reservoir raises $8m seedreservoirhome.com · Aug 12, 2026