Ground Source Heat Pumps

Save money with the most efficient type of heat pumpground source heat pumps. 
ground source heat pump
These heat pumps can offer up to 50 percent savings on heating and cooling costs when compared to conventional fossil fuel systems.

Ground source heat pumps (also known as geothermal heat pumps) are the most efficient type of heat pump. They can do all of the heating and cooling in your building.

They work by extracting heat from the ground during cold weather and distributing it throughout your business. During warmer months, this process is reversed to provide cooling.

These heat pumps are great for businesses with sufficient outdoor space to accommodate the system.

Equipment Type Efficiency Requirements Amount ($/Ton)
Ground Source – Ground Water Heat Pump or Ground Loop Heat Pump Refer to for list of equipment and minimum requirements  $4,500 

Tons are calculated based on AHRI-rated cooling capacity divided by 12,000 btu/h
  1. Purchase & Install Eligible Equipment
    Have a licensed contractor install eligible equipment.
  2. Submit Rebate Form with Required Documentation
    Apply Online
    Print & Mail Rebate Form

Constructing a new building or completing a major renovation? Read more about our program offerings here.

Can’t find what you’re looking for? The Sponsors of Mass Save offer customized project support to help your business save money and energy, and reduce greenhouse gas emissions. If you have any questions, please contact your Sponsor

For a full list of eligibility requirements and dates, please reference the rebate form.

  • Equipment displacing natural gas eligible only for commercial or industrial metered customers receiving natural gas service from a Sponsor of Mass Save, including those in municipal electric territories.
  • Equipment displacing oil, propane, or electric resistance eligible only for commercial or industrial metered customers receiving electric service from a Sponsor of Mass Save.
  • Equipment must be listed on the Mass Save Heat Pump Qualified Product List (QPL).
  • Equipment must be used for heating to supplement or replace existing oil, propane, natural gas, or electric-resistance systems.
    • If existing fossil fuel heating equipment will remain in place, customer must either install an integrated control from the Mass Save QPL ( or must certify that an existing building control system is capable of operating both the heat pump and existing heating equipment in parallel, subject to the stated switchover temperature. Documentation of control sequence may be required.
  • Equipment that has already received a rebate from a Sponsor of Mass Save or is being installed in a new construction or major renovation project is not eligible for a rebate.

Contact your Sponsor before installation if:

  • The proposed project is more than 150 tons for Cape Light Compact, Eversource, or National Grid customers; larger systems will be reviewed on a case-by-case basis. For Berkshire Gas, Liberty, or Unitil customers, all projects require preapproval.
  • The proposed project is for a new building being constructed or a major renovation (visit
  • The proposed project is for a multifamily building, as rebate eligibility depends on the metering of the facility.
  • The heat pumps that are being installed will be using a hydronic or water loop internal to the building (i.e., not a ground loop) as a heat source/sink.
  • You or your contractor has questions about project eligibility.
  • The proposed project is replacing existing heat pump equipment.


Not Sure Where To Start?

If you’re looking for advice on how to save energy, the Sponsors of Mass Save offer energy assessments and guidance to support efficiency projects from start to finish.

Learn More