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Heat Pump Water Heaters

heat pump water heaterTens of thousands of Mainers own heat pump water heaters. They’re popular because they produce lots of hot water, can save more than $3,500 over their ten-year life, and with current incentives, can be less expensive to buy than traditional electric water heaters. In addition, while they heat water they also dehumidify.

 

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

Purchase Price Savings
  Electric
Water Heater		 Heat Pump
Water Heater		 Additional
Purchase Cost
Warranty/Capacity 6 year/40 gal. 10 year/50 gal.  
Purchase price* $379 $1,149  
Rebate/instant discount n/a -$750  
Net purchase price $379 $399 $20
   
Payback Period: 3 weeks
   
Lifetime Savings  
Ten-year electricity savings** $3,500
Additional Purchase Cost -$20
Lifetime Net Savings
 $ 3,480

Benefits

  1. With available incentives, heat pump water heaters can cost less than electric water heaters.
  2. They produce lots of hot water.
  3. They can save more than $3,500 over the life of the unit compared to electric water heaters.**
  4. They typically have 10+ year warranties.
  5. They help dehumidify.

*Note: Your costs may vary.
**Source: energystar.gov accessed 2/25/21. Click here to estimate your own savings

Take Action

  1. If your electric water heater is more than 10 years old, replace it now while incentives are available. Don’t wait for it to break.
  2. 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

  1. 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.
  2. They complement but do not replace dehumidifiers because they operate based on hot water demand instead of humidity levels.
  3. Condensate from the heat pump water heater must be plumbed to a sink or drain.
  4. For optimum efficiency, install units in 10’ x 10’ or larger rooms with temperatures above 35°F.
  5. Recommended clearances from walls and ceilings should be followed to ensure adequate air circulation and access.
  6. The first few feet of incoming and outgoing pipe should be insulated to minimize heat loss.
  7. Air filters must be rinsed regularly.

Click the links below to learn more:

Mail-in rebate claim form

List of best prices in Maine

User tips guide

Maine plumber testimonials

Myths and Facts sheet

Myths and Facts video