Get instant hot water

at 6x the efficiency of gas.

Get instant hot water

at 6x the efficiency of gas.

Join the Reservoir Waitlist

Join the Reservoir Waitlist

Early access in Boston Metro in fall 2025.

Get instant hot water

at 6x the efficiency of gas.

Join the Reservoir Waitlist

Early access in Boston Metro in fall 2025.

Meet Reservoir

The world's most powerful heat pump water heater.

6x

6x

the efficiency of gas

without losing performance

150 gal

150 gal

from a 50-gallon tank

In Party Mode

$8,000

$8,000

10 year savings potential

vs. standard electric in Boston

1 drop

1 drop

per minute leak detection

detectable in hot plumbing lines

EFFICIENCY WITHOUT SACRIFICE

Reservoir turns your hot water into an asset for a healthier, happier home.

Get more hot water.

No oversizing needed, even with visitors. Get up to 150 gallons from a 50 gallon tank.

Protect your home.

Prevent leaks, freezing pipes, scalding and bacteria. Peace of mind for you and your insurance agent.

Save money for joy.

Reservoir intelligently manages energy to save up to $800 per year.

Get more hot water.

No oversizing needed, even with visitors. Get up to 150 gallons from a 50 gallon tank.

Protect your home.

Prevent leaks, freezing pipes, scalding and bacteria. Peace of mind for you and your insurance agent.

Save money for joy.

Reservoir intelligently manages energy to save up to $800 per year.

Get more hot water.

No oversizing needed, even with visitors. Get up to 150 gallons from a 50 gallon tank.

Protect your home.

Prevent leaks, freezing pipes, scalding and bacteria. Peace of mind for you and your insurance agent.

Save money for joy.

Reservoir intelligently manages energy to save up to $800 per year.

HOW IT WORKS

Thermal Intelligence

Get plenty of hot water without oversizing. Up to 6x the efficiency of a gas tank heater.

Reservoir dynamically manages four separate heating elements, including an ultra-efficient heat pump, to give you plenty of hot water in the most efficient way possible.

Reservoir will also incorporate your utility rates and energy sources to store heat at high temperatures when electricity is cheaper and cleaner or straight from the solar panels on your roof. Think of it as a thermal “battery” for your home.

Reservoir dynamically manages four separate heating elements, including an ultra-efficient heat pump, to give you plenty of hot water in the most efficient way possible.

Reservoir will also incorporate your utility rates and energy sources to store heat at high temperatures when electricity is cheaper and cleaner or straight from the solar panels on your roof. Think of it as a thermal “battery” for your home.

Reservoir dynamically manages four separate heating elements, including an ultra-efficient heat pump, to give you plenty of hot water in the most efficient way possible.

Reservoir will also incorporate your utility rates and energy sources to store heat at high temperatures when electricity is cheaper and cleaner or straight from the solar panels on your roof. Think of it as a thermal “battery” for your home.

No-Wait Shower

Stop dumping water down the drain while you wait for heat.

Reservoir delivers hot water to your shower faucet before you even turn it on. Get luxury and efficiency with the only water heater smart enough to combine a heat pump and recirculation. Once you have a No-Wait Shower, you can’t live without it.

Home Protect

Commercial grade protection for the single family home.

Home Protect detects and warns you of leaks with ultrasonic flow sensing so powerful it can detect the thermal expansion of water. Additional sensors predict freezing pipes to alert you of danger, while Reservoir's built-in recirculation can help warm hot water lines. Electronic corrosion control extends Reservoir’s tank life for up to 20 years.

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EASY OPERATION

Have as much (or as little) control as you want. From anywhere.

Set it and forget it.

No app necessary. Let Reservoir do the thinking so you don’t have to.

Adaptive Mode learns from your behavior to optimize output and energy use.

Full control.

Some people want even more control, especially with visitors.

And some just want Dad Mode for when your teenager needs to finish that shower.

From anywhere.

Schedule Vacation Mode, even if you’re already at the airport.

And feel free to check in just for peace of mind.

Set it and forget it.

No app necessary. Let Reservoir do the thinking so you don’t have to.

Adaptive Mode learns from your behavior to optimize output and energy use.

Full control.

Some people want even more control, especially with visitors.

And some just want Dad Mode for when your teenager needs to finish that shower.

From anywhere.

Schedule Vacation Mode, even if you’re already at the airport.

And feel free to check in just for peace of mind.

Set it and forget it.

No app necessary. Let Reservoir do the thinking so you don’t have to.

Adaptive Mode learns from your behavior to optimize output and energy use.

Full control.

Some people want even more control, especially with visitors.

And some just want Dad Mode for when your teenager needs to finish that shower.

From anywhere.

Schedule Vacation Mode, even if you’re already at the airport.

And feel free to check in just for peace of mind.

TESTIMONIALS

Home owners already love their Reservoir.

Home owners already love their Reservoir.

Andreina

Belmont, MA

I upgraded from a generic electric water heater when I realized how much money I was wasting. I’m saving hundreds a year with Reservoir, and we have plenty of hot water for a full house.

Andreina

Belmont, MA

I upgraded from a generic electric water heater when I realized how much money I was wasting. I’m saving hundreds a year with Reservoir, and we have plenty of hot water for a full house.

Andreina

Belmont, MA

I upgraded from a generic electric water heater when I realized how much money I was wasting. I’m saving hundreds a year with Reservoir, and we have plenty of hot water for a full house.

Direct replacement for most water heaters.

In a basement. In a garage. In a utility room.

Direct replacement for most water heaters.

In a basement. In a garage. In a utility room.

Direct replacement for most water heaters.

In a basement. In a garage. In a utility room.

But it looks so good

you might not want to hide it.

But it looks so good

you might not want to hide it.

But it looks so good

you might not want to hide it.

Join the Reservoir Waitlist

Join the Reservoir Waitlist

Join the Reservoir Waitlist

ABOUT US

We believe you can have both joy and efficiency.

Luke Winston-Almanzar

Co-Founder, CEO

Luke Winston-Almanzar

Co-Founder, CEO

Luke Winston-Almanzar

Co-Founder, CEO

Gabriel Parisi-Amon

Co-Founder, CPO

Gabriel Parisi-Amon

Co-Founder, CPO

Gabriel Parisi-Amon

Co-Founder, CPO

Jake Felser

Co-Founder, CTO

Jake Felser

Co-Founder, CTO

Jake Felser

Co-Founder, CTO

Luke Winston-Almanzar Bio

Gabriel Parisi-Amon Bio

Jake Felser Bio

Luke Winston-Almanzar Bio

Gabriel Parisi-Amon Bio

Jake Felser Bio

Luke Winston-Almanzar Bio
Gabriel Parisi-Amon Bio
Jake Felser Bio

We are building Reservoir to protect what we love: our families, our homes, our health and our planet. We also love long, hot showers.

We believe you can have both joy and efficiency. And that is how we get everyone on board.

We are starting with hot water because it is the biggest energy and money guzzler that nobody is talking about. And hot water is the fastest way to make a huge impact on energy, finances and comfort in literally any home in America. We are proud to start Reservoir in the City of Boston, home to centuries of water technology innovation.

We are building Reservoir to protect what we love: our families, our homes, our health, and our planet. We also love long, hot showers.

As serial entrepreneurs and technologists, we believe you can have both joy and efficiency. And that is how we get everyone on board.

We are starting with hot water because it is the biggest energy and money guzzler that nobody is talking about. And hot water is the fastest way to make a huge impact on energy, finances and comfort in literally any home in America. We are proud to start Reservoir in the City of Boston, home to centuries of water technology innovation.

Sign up for updates.

Not ready to reserve? Stay in the know. No spam.