Knowledge Reservoir

Today, Reservoir is announcing our first expansion location outside Massachusetts: Portland, Maine. We’ll be bringing more Reservoirs to more homes out of our new, second home base.

Reservoir's N51 Heat Pump Water Heater was named a winner in the Consortium for Energy Efficiency's 2026 Integrated Home Competition.

See how much a heat pump water heater saves over electric resistance, and whether it's worth upgrading before yours fails.

Finance a Reservoir heat pump water heater with $0 down and 0% interest through Mass Save's HEAT Loan. See if you'll save more than you pay each month.

Reservoir has raised $8M to bring predictive water heating to more homes, train the next generation of plumbers, and help balance the electric grid. Here's what's next.

Do you have to shut off hot water when leaving for a trip? Reservoir’s Vacation Mode gets you peace of mind, energy savings, and plenty of hot water when you’re back. Here's exactly what it does and how to set it up.

Tank capacity tells you what's stored. First Hour Rating tells you what you can use without running out.

A thermal battery stores energy as heat instead of electricity, and your water heater could be one. Learn how predictive heating turns your tank into a tool that saves you money and helps balance the grid.

Learn how water heaters work, from tanks and anode rods to heat pumps and tankless units, plus the real reasons they fail and when to replace one.

Massachusetts has some of the highest energy costs of any state in the US. Fortunately, state and regional rebate programs are helping homeowners update their home appliances to high-efficiency models that reduce monthly utility bills.

Announcing two products that make Reservoir the most affordable (and awesome) hot water in Boston.