Reservoir raises $8M to make water heaters that people — and the grid — will actually want

that people — and the grid — will actually want">

It’s hard to imagine a home appliance more forgotten — yet more consequential — than the water heater. Most people only think of water heaters when their shower runs cold, but they represent about 18% of a household’s total energy budget and are one of the main causes of residential water damage.

To Luke Winston-Almanzar, water heaters are in clear need of an upgrade. “The typical water heater is devoid of intelligence, it’s using a god-awful amount of energy, and my air fryer is smarter than it,” he told TechCrunch. “I was using more energy to heat my water than it takes to drive my electric car.”

So Winston-Almanzar, who was previously chief business officer at 3D printing startup Formlabs , co-founded Reservoir along with Gabriel Parisi-Amon and Jake Felser to make a water heater that they would want to buy.

Reservoir announced Wednesday that it has raised $8 million in a seed round led by Asymmetric Capital Partners with participation from Founder Collective and MCJ.

The funding will help the company install more of its water heaters in homes around the Boston area, it’s initial market. Reservoir has installed about 100 devices to date, and Winston-Almanzar said his company hopes to have around 1,000 installed by the end of next year. “That’s when you start talking about a megawatt-scale in terms of capacity,” he said.

Storing megawatt-hours of energy as hot water could go a long way to stabilizing the grid. Today’s water heaters tend to be dumb devices, responding only to changes in temperature in the tank. But Reservoir, by predicting when people will need hot water, can heat the tank when electricity demand is low and prices are cheap. Plus, the device’s heat pump is nearly four times more efficient than an electric water heater and five times more efficient than a natural gas version.

The startup has been able to show that it can relieve strain on the grid at the neighborhood level, Winston-Almanzar said. Eventually, Reservoir could aggregate its fleet of water heaters to participate in utility demand response programs, which pay handsomely for large users to avoid tapping the grid at certain times. Winston-Almanzar said he’s looking at ways to use those payments to keep Reservoir’s prices down.

While energy storage might get grid experts excited, it won’t sell many water heaters. Most people replace their water heaters with whatever their plumber has on hand. The Reservoir team knew they needed to do more than build another heat pump water heater. “The sustainable product need to just be the better product,” he said.

To make an appliance that customers will seek out, Reservoir has included a number of features that aren’t found in typical water heaters.