Air to Water Heat Pumps

*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.

1. Confirm Eligibility
   View the Eligibility Tab to confirm the eligible requirements. The Sponsors of Mass Save offer enhanced incentives to income-qualified households. 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
   Heat pumps perform best when a home is sufficiently weatherized and the system is sized properly for the home. These are requirements for the Air to Water Heat Pump Rebate, and the Whole-home Heat Pump Verification Form must be completed and signed. See the eligibility tab for more details. 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.
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. We recommend getting proposals from 2-3 contractors.
4. Purchase & Install Eligible Equipment
   Work with your contractor to purchase and install an eligible heat pump system.     
5. Submit Rebate Form with Required Documentation
   Apply Online
   Or
   Print & Mail Rebate Form
   
6. If Selected, Schedule Your Inspection
   Some projects are selected for random inspection to ensure program compliance. If yours is selected, you will be notified by email. You will need to schedule the inspection in order for your rebate to be processed.

• 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.
• If your home already has a heat pump installed that supplements your existing heating system, this may impact your rebate eligibility. Installations that replace existing heat pumps with new heat pumps are not eligible for partial-home or whole-home rebates. You may be eligible for the basic heat pump rebate. It is recommended to schedule a no cost decarbonization consultation or speak with your HPIN contractor about rebate expectations before starting work to review options.
• 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 be listed on the Mass Save Heat Pump Qualified Products List.
• 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 installation and a Whole-Home Heat Pump Verification Form must be completed and signed.
• Rebate form and supporting documentation must be received by February 28, 2027.
• The deadline for submitting applications for equipment purchased in 2025 was February 28, 2026.

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.