Ground Source Heat Pumps

Rebates are based on whether the heat pump system will serve the whole-home or partial-home.

* Tons are calculated based on AHRI cooling capacity divided by 12,000 BTUs. Rebate amount based on tons.   ↩

** The Sponsors of Mass Save offer enhanced incentives for income-qualified households. Pre-existing fuel type must be oil, propane, or electric resistance. Cape Light Compact enhanced heat pump rebates differ from the amount listed. Customers are eligible for 80% of the installed cost of qualifying heat pump systems.   ↩

Whole-home rebates are available to customers who install heat pumps as the sole source of heating and cooling. See the Whole-Home Heat Pump Verification Form for details.

Partial-home rebates are offered based on equipment size (tonnage) to customers who install heat pumps in a section of their home.

Cost Example

Below are cost examples of installing a whole-home ground source heat pump. The average installation cost is based on Mass Save program data for whole-home ground source heat pump installations completed in 2022.

1. Confirm Eligibility
   View the Eligibility Tab to confirm the eligible requirements. The Sponsors of Mass Save offer enhanced incentives to income-qualified households. If you are a Cape Light residential customer, please call 1-800-797-6699 or learn more here. To verify your heat pump project is eligible for a rebate, you can complete a pre-verification form through the online application portal.
2. Ensure Your Home Has Sufficient Weatherization
   View the Eligibility Tab for additional details. This is a requirement for whole-home rebates and may qualify customers pursuing partial-home rebates for a $500 bonus.
3. Find a Qualifying Contractor
   To qualify, the heat pump system must be installed by a contractor participating in the Mass Save Heat Pump Installer Network. The contractor can help you determine what solution is best suited for your home.
4. Purchase & Install Eligible Equipment
   Work with your contractor to purchase and install an eligible heat pump system.
   If doing a whole-home heat pump, you must also satisfy the requirements listed on the Whole-Home Heat Pump Verification Form.
5. Submit Rebate Form with Required Documentation
   Apply Online
   Or
   Print & Mail Rebate Form

• Offers valid only for residential customers replacing oil, propane, or electric resistance heating systems where Cape Light Compact, Eversource, National Grid, or Unitil is the Mass Save Electric Sponsor. Customers must apply using a residential electric account. Limit one (1) whole-home rebate per account.
• Offers valid only for residential customers replacing natural gas heating systems where Berkshire Gas, Eversource, Liberty Utilities, National Grid, or Unitil is the Mass Save Natural Gas Sponsor¹. Customers must apply using a residential gas account. Limit one (1) whole-home rebate per account.
• Equipment must be installed between January 1, 2026 and December 31, 2026 by a contractor participating in the Mass Save Heat Pump Installer Network
• Equipment must meet ENERGY STAR® Cold Climate criteria. Refer to the Mass Save Heat Pump Qualified Products List for a complete list of eligible units
• Equipment must be new and installed to displace oil, propane, natural gas, or electric baseboard (resistance) as the primary heating system.
  
  • Whole-Home Rebates: Homes must be sufficiently weatherized prior to heat pump installation² and a Whole-Home Heat Pump Verification Form must be completed and signed. Customers in multi-family 5+ buildings are encouraged to get a Home Energy Assessment and complete recommended weatherization, however weatherization is not required for these building types.
• Rebate form and supporting documentation must be received by February 28, 2027.

Please note, this rebate is only available to residences that are occupied full time during the winter heating season. Rebate cannot be combined with other Mass Save incentives for the same equipment. Rebate amount not to exceed total installation cost. Sponsor reserves the right to conduct a verification inspection prior to rebate payment. Please allow eight weeks for rebate processing. Sponsor does not warrant the performance of installed equipment. See Terms and Conditions for full requirements.

1. Customers in municipal electric territories are eligible for heat pump rebates if they are a natural gas heating customer of one of the Sponsors of Mass Save. Customers with municipal gas heating are not eligible for heat pump rebates. 
2. Sufficient weatherization can be demonstrated by satisfying at least one of the following requirements: (A) home was built during or after 2000, (B) Home Energy Assessment report indicates less than $1,000 worth of weatherization recommended, or (C) weatherization recommendations made during or after 2013 have been completed. Heat pumps installed for whole-home heating and cooling that do not meet the weatherization requirement may be eligible for partial-home rebate amounts.  

If you have any questions, please call 1-888-855-0340 or email [email protected].

The Sponsors of Mass Save offer 0% financing HEAT Loans to make energy efficiency upgrades more affordable to Massachusetts residents. Through this loan, you could qualify for a loan up to $25,000 toward qualified home improvements.