Your basement has a boiler. Your rooms have radiators or baseboard. There is not a duct anywhere in the building, and when you started looking into heat pumps somebody told you that ductwork is a prerequisite. That is one of the most common misconceptions about heat pumps, and it keeps people in older Massachusetts homes burning oil years longer than they need to. Heating a home without ductwork is not only possible, it is how a large share of heat pump projects in this part of the state get done. Here are the three realistic paths and the tradeoffs that come with each.
Why So Many Homes Here Have No Ducts
This is a regional quirk worth understanding. Much of the housing stock in central Massachusetts went up before forced air became the standard. Those homes were built around hydronic systems, meaning a boiler heats water and pipes carry it to radiators or baseboard around the house. Cooling came later, usually as window units, so there was never a reason to install ductwork.
That leaves a lot of houses with excellent heat distribution and no air distribution at all. The good news is that ductless technology was developed for exactly this situation, buildings that need heating and cooling but have no ducts to carry it.
Option One: Ductless Mini Splits
This is the most common answer. An outdoor unit connects to indoor heads mounted inside the house, and refrigerant lines run between them through a small hole in the wall rather than through ductwork.
Most people picture the wall mounted head near the ceiling, and that is the standard indoor unit. You have other choices, though. Floor mounted units sit low against a wall and work well under windows or in rooms where a high wall mount looks wrong. Ceiling cassettes recess into the ceiling so only a flat grille shows, which reads much like a vent and suits finished spaces where appearance matters.
The advantage is zoning. Each head runs independently, so the bedroom nobody uses during the day is not being heated to the same temperature as the living room. That control is genuinely useful in an older house where some rooms run cold and others bake.
The tradeoff is visibility. There are indoor units on your walls, and there is a line hide running down the exterior of your house from each one. Good installers plan those runs carefully and the result looks tidy, but it is not invisible.
Option Two: Short Run Ducted Units
This option surprises people, because they assume ducted means a full duct system through the whole house.
A small ducted air handler can be tucked into a closet, a dropped ceiling, an attic, or a basement, and then feed two or three nearby rooms through short duct runs. A handful of these placed strategically can condition a whole house without a single visible wall unit. Supply registers look like ordinary vents in the ceiling or floor.
This costs more than ductless heads because of the carpentry and the ducting, and it needs somewhere to put the air handler. If you have a walk up attic, a spare closet, or a basement under the rooms you want to condition, it is worth pricing. Homeowners who dislike the look of wall units often find this is the option nobody told them about.
Many projects mix the two, using ducted units for bedrooms upstairs and a ductless head in an open living area.
Option Three: Keep the Boiler, Add Heat Pumps
Plenty of people are not ready to remove a working boiler, especially one that is only a few years old. A hybrid setup adds heat pumps for the main living spaces while the boiler stays for the rest of the house and for the coldest stretches.
This works fine mechanically. It costs you significantly in rebate money, though, and that surprises people.
Verified as of September 2026, Mass Save pays $2,650 per ton for a whole home conversion where the heat pump becomes your only heating source and the old system is removed or disconnected, capped at $8,500. A partial home setup where the boiler stays pays $1,125 per ton instead. There is also a condition people miss. Any heating zone where oil, propane, or gas stays in use needs an integrated control from the Mass Save qualified control list, so the two systems coordinate rather than fight each other. Skip that control and the rebate does not apply to those zones.
None of that means hybrid is wrong. It means the decision is worth making with the actual numbers in front of you rather than assuming you can add heat pumps now and go whole home later at the same rate.
Yes, They Work Through a New England Winter
This is the question every homeowner asks once ductless becomes the plan, and it deserves a direct answer rather than a sales line.
Cold climate rated heat pumps are a different category from the equipment people remember from twenty years ago. Current cold climate models are rated to run at minus 13 degrees Fahrenheit, which is colder than most Massachusetts nights get, and the better ones hold their full rated heating output well below freezing rather than fading as the temperature drops.
Two things matter more than the brand on the box. The system has to carry ENERGY STAR Cold Climate certification, which is also a Mass Save rebate requirement, so ask to see that on your quote. And each zone has to be sized to your actual heating load, because an undersized head in a cold room is a common reason someone concludes heat pumps do not work here.
If you are removing the boiler entirely, that sizing conversation is the whole ballgame. Ask your installer what your design temperature is and what the system produces at it.
What It Actually Looks Like Living With It
A few practical things homeowners ask about after the fact.
Wall heads are quiet, though not silent the way a radiator is. You will hear a soft fan at higher output and very little at low output, since they run long and low rather than cycling hard. Most people stop noticing within a few days.
Each indoor unit produces condensate in cooling mode and needs a drain path. In a basement or first floor that is usually simple gravity drainage. Upstairs units sometimes need a small condensate pump, which makes a faint clicking sound you will notice for about a week and then never again.
Filters in each head need rinsing every few weeks during heavy use, which is far more often than the disposable filter in a ducted system. It takes a minute per unit, and neglecting it is a common reason a healthy system starts underperforming.
Getting the Zoning Right
The most common mistake in ductless projects is putting a head in every room.
More zones means more equipment and higher cost, and often worse performance too, because each head ends up oversized for the small space it serves and short cycles. Open floor plans usually do better with one well placed head serving the whole area. Bedrooms with doors that stay closed need their own zone, and rooms that stay open to the rest of the house often do not.
A proper load calculation for each zone answers this. A contractor who counts rooms and quotes that many heads has not done the work.
The Short Version
Having no ductwork narrows your options, it does not eliminate them. Ductless heads are the most common and least expensive path. Short run ducted units cost more and hide better. A hybrid keeps your boiler at a real cost in rebate money. Which one fits depends on your floor plan, the closet and attic space you can spare, and how you feel about equipment on the walls. All three get a Massachusetts home through the winter without a duct system running through it.
Frequently Asked Questions
Can you install a heat pump in a house with no ductwork?
Yes. Ductless mini splits connect an outdoor unit to indoor heads with small refrigerant lines rather than ducts, and short run ducted units can serve a few rooms each from a closet or attic. Homes with boilers and radiators are routinely converted this way in central Massachusetts.
Do I have to put a unit in every room?
No, and doing so is usually a mistake. Open areas typically need one well placed head, while bedrooms that stay closed generally need their own. Too many zones raises cost and causes short cycling, since each head ends up oversized for the space it serves. A load calculation for each zone determines what your home actually needs.
Can I keep my boiler and add heat pumps?
Yes, though it affects your rebate. Whole home conversions where the old system comes out earn $2,650 per ton up to $8,500, while partial home setups that keep the boiler earn $1,125 per ton, verified as of September 2026. Any zone still using oil, propane, or gas also requires a qualifying integrated control for the rebate to apply.
Are wall mounted units the only option?
No. Floor mounted units sit low against a wall, ceiling cassettes sit flush in the ceiling and read like a vent, and short run ducted air handlers hide entirely in a closet or attic while feeding ordinary looking vents. Many homes mix these depending on the room.
Wondering which approach suits your floor plan? LaCroix Heating and Cooling has been installing ductless and ducted heat pumps in older Worcester and Middlesex County homes since 2012, and we will size each zone properly rather than counting rooms. We are a Fujitsu Elite Contractor and a Mass Save approved heat pump installer, and our work carries a 1 year installation warranty plus 12 year manufacturer parts coverage. Call or text (508) 762-9131.
