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2026 Mass Save rebate guide
Mass Save publishes a standard $2,650-per-ton air-to-water heat pump rebate up to $8,500, plus income-based incentives with potential savings up to $16,000 for qualifying households.
Model estimates
Standard estimates apply the published $2,650-per-ton formula to reviewed regional QPL capacities and then apply the $8,500 cap. Income-based amounts cannot be calculated from tonnage alone.
| APOLLO model | Program-rated or QPL capacity | Standard estimated rebate | Potential income-based incentive | Published program cap |
|---|---|---|---|---|
| APOLLO 3.5 Ton / 42K BTUAP-EVI-DC-3.5T | 2.30 QPL tons | $6,095 estimated rebate | Up to $16,000 potential income-based incentive | $8,500 standard; up to $16,000 income-based |
| APOLLO 5 Ton / 60K BTUAP-EVI-DC-5T | 5.00 QPL tons | $8,500 estimated rebate after cap | Up to $16,000 potential income-based incentive | $8,500 standard; up to $16,000 income-based |
| APOLLO 6 Ton / 72K BTUAP-EVI-DC-6T | 5.50 QPL tons | $8,500 estimated rebate after cap | Up to $16,000 potential income-based incentive | $8,500 standard; up to $16,000 income-based |
Confirm each APOLLO model and capacity on the current Mass Save HPQPL before purchase. The reviewed regional QPL uses 2.30, 5.00 and 5.50 nominal cooling tons for the listed standard models; exact Mass Save list status remains controlling.
Per-ton programs use capacity recorded on the applicable qualified-products list. The APOLLO 3.5, 5 and 6 Ton commercial names do not necessarily equal the program tonnage. These estimates use the current reviewed regional values and must be rechecked against the live Mass Save HPQPL.
Program pathways
The correct path depends on household income, existing heating fuel, installed cost, sponsor and whole-home project conditions.
$2,650 per ton, up to $8,500
The model must be on the current Mass Save Heat Pump Qualified Product List and the project must satisfy the residential air-to-water requirements.
The rebate cannot exceed total installation cost and cannot be combined with other Mass Save incentives for the same equipment.
Up to $16,000 potential incentive
Enhanced incentives are available to income-qualified households and depend on qualifying pre-existing fuel and installed cost.
The published page states that eligible customers can receive 80% of installed cost, up to the program maximum. Cape Light Compact amounts can differ.
Weatherization and verification required
Whole-home projects require sufficient weatherization and a completed Whole-Home Heat Pump Verification Form.
The residence must be occupied full time during the winter heating season.
Before you buy
Application roadmap
Use the official eligibility tab or pre-verification process before signing a final proposal.
Determine whether the home meets the Mass Save weatherization requirement before whole-home installation.
The contractor should confirm the equipment, displaced system, design and applicable standard or income-based path.
Check the complete outdoor-unit or system record on the current list, not only the APOLLO product family name.
Keep the final paid invoice and complete the Whole-Home Heat Pump Verification Form when applicable.
Submit online or by mail with required documentation by the current program deadline.
Common questions
The table multiplies $2,650 by the reviewed QPL capacity and applies the $8,500 standard cap. The 5.00 and 5.50 ton examples both reach that cap.
No. It is a potential maximum. Income qualification, pre-existing fuel, sponsor rules and installed cost determine the final enhanced incentive.
No. The 2026 Mass Save air-to-water offer requires installation by a contractor participating in the Mass Save Heat Pump Installer Network.
The published program requires eligible new equipment to displace oil, propane, natural gas or electric baseboard resistance as the primary heating system. Confirm the exact project pathway with the participating contractor.
No. The published standard rebate is limited by program tonnage and the $8,500 project cap. The final approved amount can also depend on project documentation and current program rules.
Verify before purchase
Continue planning
APOLLO products
These APOLLO standard models appear on the reviewed regional air-to-water qualified-products record. Confirm the current state-specific list before ordering.
42,000 BTU commercial name; program capacity may differ.
View model60,000 BTU commercial name; use the QPL capacity for estimates.
View model72,000 BTU commercial name; program tonnage may be lower.
View modelCompare APOLLO heat pump sizes and system applications.
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