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What is a Heat Pump Water Heater?

Heat pump water heaters are an efficient hot water system that transfers heat from the surrounding air to heat your home’s water without burning fossil fuels.

The Technology

How It Works

  • Heat is transferred from the surrounding indoor air into a hot water tank.
  • Hot water is then piped throughout the home. When needed, a backup source of heat will provide supplemental hot water.
  • By pulling heat from the surrounding air, heat pump water heaters also provide dehumidification to the area in which they are located.
  • If dehumidification is not wanted in the winter, ductwork can be installed to vent cold exhaust air to the outdoors.


 Explanation of Heat Pump Water Heater

This Old House | 6 min. 26 sec.

Why Should I Consider a Heat Pump Water Heater?

Heat pump water heaters are three times more efficient than conventional water heaters and can lower operating costs by 50%.

Lower Greenhouse Gas Emissions

Lower greenhouse gas emissions than heating water with oil, propane, natural gas, and electric resistance

Cost Competitive

Save money on utility bills compared to heating water with propane, oil, or electric resistance

See MassSave’s Electric Heat Pump Water Heater rebates and HEAT Loan


Provides dehumidification to the room where the heat pump water heater is located

Smart Controls

Wi-Fi controls enable homeowners to remotely control and monitor the water heater

Things to Consider

Is a heat pump water heater right for me?

Installing a heat pump water heater could save hundreds of dollars a year on your home heating and cooling bill.

Consider replacing your water heater before it fails or leaks all over the floor. A heat pump water heater can replace your existing water heat, and the installation can be done by a plumber.

Heat pump water heaters need to be located in a minimally warm area with enough open space for air circulation to operate efficiently.

Many HPWH also have Wi-FI integration which enables alerts, service warnings and more active monitoring of the system. Leak protection systems are also increasingly common, automatically shutting off water to, or sealing up areas surrounding, a leak to prevent flooding.

Your Guide to Heat Pump Water Heaters for Your Home

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