Heat Pump Water Heaters
Tens of thousands of Mainers own heat pump water heaters. They’re popular because they produce lots of hot water, help dehumidify, and can save more than $5,000 over their 10-year life.*
Heat pump water heaters work like air conditioners, but rather than moving heat from the room to the outdoors, they move heat from the room into the water tank.
Heat pump water heaters are sometimes called “hybrids” because in addition to a heat pump, they have traditional electric resistance heating elements for times when demand exceeds what the heat pump can produce.
Financial Example
| Electric Water Heater | Heat Pump Water Heater | |
| Warranty/Capacity | 6-year/40-gallon | 10-year/50-gallon |
| List Price | $449 | $1,399 |
| Incentive | $0 | $850 |
| Net Price | $449 | $549 |
| Electricity Cost* | $700/year | $189/year |
| Electricity Savings | $511/year | |
| Payback Period | 7 months |
Benefits
- They produce lots of hot water.
- They can save more than $5,000 over the life of the unit compared to electric water heaters.*
- They typically have 10+ year warranties.
- They help dehumidify.
Click here to estimate your own savings
*Compared to an electric resistance water heater as shown on Efficiency Maine’s Compare Water Heating Costs calculator as of 11/2/2022. Your results may differ.
Take Action
- If your electric water heater is more than ten years old, replace it now while incentives are available. Don’t wait for it to break.
- Use our online tools to find participating retailers and installers who can help you determine if a heat pump water heater is right for you.
Things to Consider
- Because of their noise and cooling effect, heat pump water heaters are better suited to basements than living spaces, especially if there is extra heat available from a boiler.
- They complement but do not replace dehumidifiers because they operate based on hot water demand instead of humidity levels.
- Condensate from the heat pump water heater must be plumbed to a sink or drain.
- For optimum efficiency, install units in 10’ x 10’ or larger rooms with temperatures above 35°F.
- Recommended clearances from walls and ceilings should be followed to ensure adequate air circulation and access.
- Insulate the first few feet of incoming and outgoing pipe to minimize heat loss.
- Air filters must be rinsed regularly.
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