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Geothermal Heat Pump Rebates
Heat and Cool Your Home From the Ground Up! Save With Rebates of $750 to $1,500
Rebates and Instant Discounts
Up to $1,500
  • Heating & Cooling
  • New Construction or Major Renovation
  • Rebates
  • Renewable Energy

Efficient and environmentally friendly, geothermal heat pumps use the stable, even temperature of the earth to heat and cool your home.

Additional Details

A geothermal heat pump takes advantage of the earth’s constant temperature to provide highly efficient heating and cooling. In the winter, fluid circulating in underground pipes carries the earth’s heat to your home, where it is concentrated to provide heating. In the summer, the process is reversed and heat from your home is carried back to the earth through the pipes to provide cooling.

A few feet below the earth’s surface, the ground temperature remains fairly stable through the year, ranging from 45 degrees in the North to 70 degrees in the South. Ground temperatures, like those in a cave, are warmer than the air above in the winter and cooler than the air in the summer. A geothermal heat pump taps these conditions, carrying energy through a series of fluid-filled copper or plastic pipes installed underground. This allows the geothermal heat pump to provide space heating and cooling. Some systems can also heat water.

According to studies, ENERGY STAR®-certified geothermal heat pumps can reduce energy costs by 20 to 70 percent. Approximately 70 percent of the energy used in a geothermal heat pump system is renewable energy from the ground. The systems use a small amount of electricity to operate the heat pump, ground loop pump and distribution fan or pump.

A geothermal heat pump is a reliable, low-maintenance and environmentally friendly heating and cooling choice. It operates safely and quietly, with no combustion, direct emissions or exposed outdoor equipment, such as a fuel tank.   Because it is mechanically simple and all exterior equipment is below ground, protected from the weather, maintenance costs are often lower than other heating and cooling systems.

How We Help

We make it affordable to install a geothermal heat pump system with rebates of $750 per ton for customers who heat with electric or natural gas and up to $1,500 per ton for customers who heat with fuel oil or propane for qualifying systems. Total rebate amount not to exceed $10,000 per home

Call 877-WISE-USE (877-947-3873) for more information.

Rebate applications for 2021 rebates are being accepted and processed for payment. Please submit your 2021 rebate within the prescribed timeframe on the rebate form. Please contact Eversource or United Illuminating at 877-WISE-USE with questions.

  • A closed loop circulates fluid through an underground field. The loop is enclosed in vertical and/or horizontal trenches.
  • Single or multiple pumps, fans and compressors provide heating and cooling.
  • A distribution system, typically ductwork, carries air throughout the home to maintain an even temperature.

Step 1 -

To see which geothermal heat pump systems qualify for a rebate, see the "Who is Eligible & System Requirements" section below. Refer to the Geothermal Rebate Application for Existing Homes for additional requirements, terms and conditions.

$750 per ton - customers who heat with electricity or natural gas 
Up to $1,500 per ton - customers who heat with fuel oil or propane
Total rebate amount not to exceed $15,000 per home

Step 2 -

Choose a geothermal contractor for your installation.

Find a geothermal contractor.

Step 3 -

Have your qualifying unit installed.

Step 4 -

Save time and money – click here to apply for a rebate and submit the required documentation online. 

If you wish, you have the option to mail in the completed application and any documentation instead. See the application for further details.

Call 877-WISE-USE (877-947-3873) for more information. 


Minimum Efficiency Levels / Rebate Schedule

Eligible Equipment Type
Minimum Efficiency Level for Rebate
Rebate per ton Oil or Propane Heated Homes
(Rebate amount not to exceed $15,000 per customer)
Rebate per ton Electric or Natural Gas Heated Homes
(Rebate amount not to exceed $15,000 per customer)
GLHP - Closed Loop Water to Air 17.1 EER1 / 3.6 COP2 Minimum $1,500 $750
DX - Direct Expansion Refrigerant 16.0 EER / 3.6 COP Minimum $1,500 $750
W to W - Water to Water 16.1 EER / 3.1 COP Minimum $1,500 $750
1 EER - Energy Efficiency Ratio     2 COP - Coefficient of Performance

Eversource and UI residential electric service customers are eligible for incentives for the installation of a geothermal closed loop or direct expansion, packaged or matched coil/split* including water to water-designed types up to six tons per unit.

Geothermal equipment must be a closed loop or direct expansion type and ENERGY STAR® certified in order to be eligible for a rebate.

  • Field testing must be done under appropriate test conditions
  • AHRI/ISO/ASHRAE Standard 13256-1 closed loop systems
  • AHRI/ISO/ASHRAE Standard 870 for DX systems


A list of ENERGY STAR certified geothermal equipment can be found on the ENERGY STAR website.

The rebate for qualifying geothermal units is $750 per nominal AHRI-rated cooling ton for successfully commissioned geothermal systems (existing homes heating with electric or natural gas to a maximum rebate amount of $15,000 per home).  Oil & propane homes only - Rebate is paid in ½ ton increments capped at $1,500 per ton, up to $15,000 total rebate.

*Multiple sections and fans must be AHRI matched.

If you are a Connecticut resident and are not served by one of the utilities listed above, please visit your municipal utility’s website to see what programs are available to you. 

Call 877-WISE-USE (877-947-3873) for more information.