Comparison
Ductless vs ducted heat pump
The outdoor unit works the same way. The difference is how heat reaches each room.
Written by HYRE HVAC Research Desk Primary-source research, data analysis and fact checking
The short answer
A ducted heat pump sends conditioned air through ductwork from one indoor air handler. A ductless heat pump puts indoor heads in each zone, linked to the outdoor unit by refrigerant lines.
Choose ducted when you have sound ducts that reach every room. Choose ductless when ducts are missing, leaky or impractical, or when you want to heat and cool only part of the house.
How does the delivery differ?
A ducted heat pump pairs an outdoor unit with an air handler or a furnace coil. The blower pushes air through supply ducts and pulls it back through returns. One thermostat controls the house unless you add zoning.
A ductless heat pump, often called a mini split, has one or more indoor heads mounted on a wall, ceiling or floor. Each head has its own fan, coil and controls.
Multi-zone systems run several heads from one outdoor unit. Ducted mini splits also exist: compact air handlers that serve a few rooms through short duct runs.
Ductless vs ducted heat pump at a glance
| Ductless | Ducted | |
|---|---|---|
| Ducts | None | Supply and return ducts |
| Zones | Each head is a zone | One, unless zoned |
| Duct losses | None | Depends on duct condition and location |
| Visible equipment | Heads in rooms | Hidden; grilles only |
| Filtration | Washable screens in each head | One central filter, higher MERV possible |
| Backup heat | Usually none built in | Electric strips or a furnace (dual fuel) |
| Best fit | No ducts, additions, problem rooms | Sound ducts serving the whole house |
Certified efficiency for either type appears in the AHRI Directory for the exact combination.
Why do ducts matter so much?
Ducts in attics, crawlspaces and garages sit outside the conditioned space. Leaks and poor insulation there waste heat in winter and cooling in summer.
DOE’s 2018 review of field studies found duct leakage among the most common faults in installed systems, and repairing ducts as part of corrective work was among the larger efficiency gains it reported.
If your ducts are leaky, fixing them may be worth doing before deciding; if they are beyond repair, ductless avoids the issue.
Heat pumps also deliver air at lower temperatures than a furnace, so ducts must carry enough airflow. Small or restrictive ducts can leave a ducted heat pump struggling.
What drives the cost?
For ducted: whether the existing ducts can be reused, the air handler or furnace coil, the outdoor unit and any duct repair.
For ductless: the number of heads, the line-set runs, condensate routing and electrical work.
Many homes combine both: a ducted system for the main floor and a ductless head for a room the ducts serve badly.
We publish no prices here: we do not yet hold enough sourced, dated quotes to state one honestly. Use the cost hub and the HVAC cost calculator with your own quotes.
Where each one wins
Ductless wins when
There are no ducts, or adding them would be invasive.
One area is always too hot or too cold.
You are heating a new addition, garage conversion or sunroom.
Ducts run through unconditioned space and are leaky.
Ducted wins when
Sound, well-sealed ducts already serve the house.
You want no visible indoor heads.
You want a central filter or a furnace as backup.
How does each one look and sound in the house?
A ducted system is invisible apart from the grilles, and the blower noise sits in a closet, attic or basement.
A ductless head is a visible unit on the wall, usually high up, with a quiet fan that you can hear at high speed.
Some owners dislike the look; others accept it for the room-by-room control.
Ceiling cassettes and floor consoles are alternatives, as are compact ducted mini split air handlers hidden in a closet or soffit that serve two or three nearby rooms through short ducts.
Questions to ask
A duct leakage test shows whether reuse is sensible.
Ask for a room-by-room load. Oversized heads short-cycle.
Ask about output at your design temperature and backup heat.
Condensate needs a route or a pump.
Questions
Are ductless heat pumps more efficient than ducted?
Can a ductless heat pump heat a whole house?
Can I use my old AC ducts for a heat pump?
Do ductless systems need backup heat?
Can I mix ducted and ductless?
Written and audited by
HYRE HVAC Research Desk
Primary-source research, data analysis and fact checking
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