Cities / Massachusetts / Rebates
Mass Save Ground Source Heat Pumps: Open
Enrollment for 2026 is open. Open for 2026 installations. Applications must be postmarked by February 28, 2027.
Serves: Massachusetts residential customers of Berkshire Gas, Cape Light Compact, Eversource, Liberty, National Grid, or Unitil.
Do I Qualify
- Replace oil, propane, electric-resistance, or natural-gas primary heating.
- Use a participating installer. Occupy the home throughout winter.
- Replacing an existing heat pump does not qualify for these displacement rebates.
How Much Comes Off
| Equipment | Requirement | Amount |
|---|---|---|
| Ground-source heat pump — whole-home | ENERGY STAR certified; sole-source heating; sufficient weatherization; signed verification form. | $13,500 per home |
| Ground-source heat pump — partial-home | ENERGY STAR certified; eligible primary-heating displacement. | $2,000 per ton |
Valid from January 1, 2026 to December 31, 2026.
Who Files It
The customer submits the signed application. Payment may be assigned to the eligible installer.
The provider pays either the contractor or the homeowner.
The Steps to Apply
- Confirm fuel eligibility and the whole-home or partial-home tier.
- Install qualifying equipment and submit the required invoice, payment proof, and verification documents.
Read on October 22, 2026 from the Mass Save page. The chart was printed Oct 2026. A change to this program is a dated line in the changelog.