Rebate marketing is usually a game of asterisks. So let's do this the other way around: the actual 2026 numbers first, then the fine print that decides whether you get them.
The 2026 numbers
| Program | What you get | The mechanics |
|---|---|---|
| Whole-home heat pump | Up to $8,500 | $2,650 per ton, capped at $8,500 — heat pump becomes the sole heating system |
| Partial-home heat pump | Up to $8,500 | $1,125 per ton, same cap — heat pump supplements an existing system |
| Ductless mini-split / AC | Up to $8,500 | Qualifying high-efficiency ductless and central systems |
| HEAT Loan | 0.00% APR | Up to $25,000 financed at zero interest for qualifying upgrades |
| Heat pump water heater | $750 instant | Applied at install — no waiting on a check |
| Smart thermostat | $100 | Energy Star–certified models |
These are the same programs listed on our rebates page, and they're set by Mass Save and your utility — not by contractors. Any company quoting you "special" rebate amounts is quoting the same state program everyone gets.
Whole-home vs. partial-home: the $1,525-per-ton difference
The single biggest fork in the road is whether your install qualifies as whole-home ($2,650/ton) or partial-home ($1,125/ton). Whole-home means the heat pump becomes your home's sole source of heat — the old boiler or furnace is removed or fully decommissioned as a backup controlled by an integrated control strategy. Partial-home means the heat pump handles some zones while the fossil system keeps others.
On a typical 3-ton system, that's the difference between $7,950 and $3,375 back. Whether whole-home makes sense depends on your house's insulation, your electrical service, and honestly, your comfort with retiring a working boiler. Modern cold-climate equipment — the Mitsubishi Hyper-Heat and LG units we're factory-trained on — maintains rated capacity at 5°F and keeps producing heat to -13°F, which covers every Massachusetts winter on record. We walk through the math both ways during a heat pump assessment.
The HEAT Loan: 0% is not a teaser rate
The Mass Save HEAT Loan is the most under-used piece of the program: up to $25,000 at 0.00% APR, repaid over terms up to 7 years, for qualifying efficiency upgrades. It's a real bank loan (issued through participating lenders), the interest is bought down by the program, and it can cover heat pumps, high-efficiency boilers, water heaters, and more.
Run the numbers: financing $20,000 of equipment at 0% instead of a typical home-improvement loan rate saves thousands in interest over the term — on top of the rebate. For a lot of families in our area, the HEAT Loan is what turns a whole-home conversion from "someday" into "this summer."
The eligibility traps that actually cost people money
- Skipping the Home Energy Assessment. Mass Save requires a no-cost assessment before rebated work. It takes about two hours and frequently throws in discounted insulation — do it first, not after.
- Equipment not on the qualified list. Rebates key off specific AHRI-matched equipment combinations. A technically excellent system that's not on the list earns $0 — this is a contractor-diligence problem, not a homeowner one.
- Wrong sizing. Oversized systems short-cycle and can miss efficiency requirements. We size on a Manual J load calculation, which is also simply how you get a system that dehumidifies properly.
- Unregistered contractors. The install must come from a participating contractor for most measures. We're a registered Mass Save partner — verify that status for anyone you hire.
- Missed paperwork windows. Rebate applications have submission deadlines after install. We file on your behalf so this one's never your problem; checks typically arrive in 6–8 weeks.
What "we file it for you" actually means
- 1Before quoting: we confirm your utility's current incentive and check the equipment combination against the qualified product list.
- 2Before install: we make sure the Home Energy Assessment box is checked and the HEAT Loan authorization is in place if you're financing.
- 3After install: we submit the rebate application with the AHRI certificate, invoices, and commissioning data, and you get the confirmation directly from Mass Save.
Rebate amounts and eligibility are set by Mass Save and your utility and can change — masssave.com has the controlling terms. What doesn't change: the contractor's job is to make the paperwork invisible to you. If you're weighing a heat pump, ductless mini-splits, or a heat pump water heater anywhere from Lakeville to Newton, call (508) 944-7623 and we'll tell you exactly what your project qualifies for.
