What we found for Massachusetts home ventilators
The cards below name the Mass Save pages we used. The amount was confirmed by us on October 5, 2026, and the finer rules come from Mass Save's contractor page.
Mass Save instant discount
An instant discount on a qualifying HRV or ERV in a retrofit project. The home must be heated by oil, natural gas or propane, the unit must be on Mass Save's qualified list, and a licensed contractor installs it and applies the discount. New construction is not eligible.
Weatherization
Not a ventilator, but the offer that most often comes before one. Insulation, air sealing and weather stripping are covered at 75% as standard, and generally 100% for income-qualified households or certain buildings with one to four units.
Free home energy assessment
The assessor can say whether a sealed-up house needs mechanical ventilation, and which product fits.
Federal credits
The 25C credit that once covered some ventilation work does not apply to 2026 installs.
Decarbonization consultation
A no-cost virtual consultation with a Mass Save Decarbonization Specialist, plus a Heating Comparison Calculator that compares the annual cost of different systems.
Electric heat is generally excluded from the discount. If your home heats with electricity, ask a Mass Save contractor whether any ventilation offer applies. We removed an earlier claim of $400 to $800 for ventilation installed with weatherization, because we found no source for it.
What an HRV does
A heat recovery ventilator brings fresh air in and sends stale air out, moving heat from the outgoing air to the incoming air on the way. One Canadian consumer guide puts the heat recovered at 65% to 85% or more, which reduces the load on your heating system compared with opening windows. An energy recovery ventilator also moves moisture between the two air streams. A city guide from Saskatoon notes that an ERV is often the better pick in a cold, dry climate. Massachusetts winters are milder and damper than the prairies, so the choice depends on the house. Ask your contractor.
Why it comes up after weatherization
Mass Save pays for air sealing and insulation, and a tighter house exchanges less air on its own. That is when a ventilator becomes a question. If the assessor finds the house is very tight, ask what ventilation the contractor recommends before the work is signed off, not after.
How to confirm the discount
Ask a Mass Save heat pump or weatherization contractor, in writing, whether the HRV or ERV you are quoted is on Mass Save's qualified list. The contractor applies the discount at the point of sale and supplies your site address, name and phone number, so the quote should show the $500 as a line item. If the project covers three or more units, the contractor may need approval from the utility first. Ask why if the quote shows no discount.
Upkeep
A ventilator only works if its filters are kept clean. One guide says to clean or replace them every one to three months and to keep the outdoor intake and exhaust clear. That is a recurring chore and should be part of your decision.
Condos, rentals and multi-unit buildings
A tenant cannot fit a ventilator in a building they do not own. Mass Save runs separate commercial programs for energy recovery ventilators in larger buildings, so a condo board planning ventilation should ask Mass Save about those, not the residential discount.
Who is left out
The discount is for retrofits, so a new build does not qualify. Electric-heated homes are generally excluded, and so is any unit that is not on the qualified list. Tenants cannot fit a ventilator in a building they do not own, and a condo board planning ventilation should ask Mass Save about its separate commercial program.
What to do in Massachusetts if you want an HRV
- Book the free Mass Save assessment, or a no-cost consultation with a Decarbonization Specialist, and ask whether the house needs mechanical ventilation.
- Check that your home is heated by oil, natural gas or propane and that this is a retrofit.
- Ask a Mass Save contractor to quote a unit from the qualified list.
- Have the contractor show the $500 discount as a line item on the quote.
- Get a second quote and plan to clean the filters every one to three months.
More for Massachusetts homes
- Massachusetts home rebates: every program in one place
- Salem home rebates: programs and the free assessment
- Cape Cod home rebates: programs and the free assessment
- Lynn insulation rebates: weatherization in detail
- Massachusetts battery rebates: ConnectedSolutions and loans
Common questions
Is there a Mass Save rebate for an HRV?
Yes. Mass Save gives an instant $500 discount on a qualifying HRV or ERV in a retrofit project, applied by a Mass Save contractor. The home must be heated by oil, natural gas or propane.
What is the difference between an HRV and an ERV?
Both recover heat from outgoing air. An ERV also moves moisture between the streams, which can help keep a house from getting too dry in winter.
Do I need an HRV after air sealing?
It depends on how tight the house is. The home energy assessment is the place to ask.
Does the federal tax credit cover an HRV?
No. The 25C credit ended for installs after December 31, 2025.
How often do I clean an HRV?
One guide says every one to three months for the filters. Follow your unit's manual.
Does the $500 apply to a new house?
No. New construction is not eligible.
What if my home heats with electricity?
Electric heat is generally excluded from the discount. Ask a Mass Save contractor what applies.
By Sam Menard. Sources, last read October 5, 2026: Mass Save: instant discounts on residential HVAC equipment, Mass Save: decarbonization consultations, MassCEC: weatherization, Cansumer: HRV and ERV systems, City of Saskatoon: What is an HRV (PDF).
