Mass Save Heat Pump Rebates
Accepting applications Checked today
Applications are open and being funded.
Open for 2026 installations, with applications accepted until February 28, 2027. No waitlist or funding warning published.
- Administrator
- Mass Save
- Administrator type
- investor owned utility
- State
- Massachusetts
- Who is covered
- Only customers in this administrator’s service territory — being in the state is not enough. (Berkshire Gas, Cape Light Compact, Eversource, Liberty Utilities, National Grid, Unitil)
- Income restricted
- Not as a blanket rule
- Installations must be completed
- December 31, 2026
- Rebate form and documentation must be received
- February 28, 2027
- Source page last fetched
- 2026-09-21
- Last change seen
- None recorded
- Contents read by a person
- 2026-09-21
Conditions worth knowing
- Which rebate you get depends on what the heat pump does, not on the equipment. A whole-home rebate needs the heat pump to be the sole source of heating and cooling, a partial-home rebate covers one that supplements an existing system, and the basic rebate covers installs that displace no heating at all. Amounts per ton are based on AHRI cooling capacity divided by 12,000 BTU.
- Installations must be completed between January 1 and December 31, 2026, and the rebate form and documentation must be received by February 28, 2027. The deadline for 2025 installations was February 28, 2026.
- Equipment must meet ENERGY STAR Cold Climate criteria, appear on Mass Save's Heat Pump Qualified Products List, and be installed by a contractor in the Mass Save Heat Pump Installer Network.
- A whole-home rebate also requires the house to be sufficiently weatherized: built in 2000 or later, or a Home Energy Assessment recommending less than $1,000 of weatherization, or the recommendations made since 2013 already completed. Buildings of five or more units are exempt. A home that fails the test may still be paid at the partial-home amounts.
- Partial-home rebates need an integrated control wherever oil, propane or natural gas stays in use, unless the heat pump fully replaces that heating zone and the old source is removed or disconnected.
- Replacing an existing heat pump with a new one does not qualify for a partial-home or whole-home rebate, although the basic rebate may apply. The basic rebate has no requirement to displace any heating, and carries no bonuses.
- Electric customers replacing oil, propane or electric resistance heat must have Cape Light Compact, Eversource, National Grid or Unitil as their electric sponsor and apply with a residential electric account. Customers replacing natural gas must have Berkshire Gas, Eversource, Liberty Utilities, National Grid or Unitil as their gas sponsor and apply with a residential gas account. Customers of municipal utilities that are not sponsors are outside the program.
- One whole-home rebate per account. A basic rebate for an unconditioned space can be added to a whole-home or partial-home rebate, but the total is capped at $8,500 per account.
- A rebate cannot be combined with other Mass Save incentives for the same equipment, cannot exceed the installed cost, and takes about eight weeks to process. Some projects are picked for inspection before payment.
- Income-qualified households can be paid considerably more; see Mass Save's Enhanced Heat Pump Rebates.
Incentive amounts
| Technology | Amount | Requirements |
|---|---|---|
| Air source heat pump: whole-home | $2,650 per ton, up to $8,500 | Heat pump is the sole source of heating and cooling; Occupied full time during the winter heating season; Home meets the weatherization test unless it is a building of five or more units |
| Air source heat pump: partial-home | $1,125 per ton, up to $8,500 | Heat pump supplements an existing heating system; Occupied full time during the winter heating season |
| Air source heat pump: basic | $250 per ton, up to $2,500 | For installs that do not displace heating: replacing an existing heat pump or central air conditioner, a new addition, or a home not occupied in winter |
| Air-to-water heat pump | $2,650 per ton, up to $8,500 | Must meet the efficiency levels on the Heat Pump Qualified Products List |
| Ground source heat pump: whole-home | $13,500 | Displaces oil, propane, natural gas or electric baseboard as the primary heating system; Home meets the weatherization test unless it is a building of five or more units |
| Ground source heat pump: partial-home | $2,000 per ton, up to $13,500 | Displaces oil, propane, natural gas or electric baseboard as the primary heating system |
| Weatherization bonus (partial-home only) | $500 | Home Energy Assessment completed and the recommended weatherization installed within one year before or six months after the heat pump; Applied for at the same time as the heat pump rebate |
| Sizing bonus (partial-home only) | $500 | Equipment sized to 90 to 120 percent of the home's heating load at the outdoor design temperature; Heating load calculation submitted with the application |
Source
www.masssave.com decides eligibility and amounts. If their page differs from this one, theirs is right. How we check