Homeowner Questions · Ductless heat pumps
How many ductless heads do I need?
Plan on one ductless head for each closed room or distinct zone you want to control independently. Open-plan areas can often share one head, while bedrooms behind doors usually need their own. A typical whole-home design may use three to five heads, but the layout and heat load decide the real number.
Checked October 26, 2026 · Educational guide, not a quote.
Quick answer
Plan on one ductless head for each closed room or distinct zone you want to control independently. Open-plan areas can often share one head, while bedrooms behind doors usually need their own. A typical whole-home design may use three to five heads, but the layout and heat load decide the real number.
The short version
- One head serves one room or open zone.
- Closed bedrooms usually need their own head.
- Open areas may share a head.
- Do not count bathrooms and halls automatically.
Start with zones, not room count
An open kitchen, dining and living area may behave as one zone. A closed bedroom with a door is usually its own zone. Bathrooms and hallways often receive enough spillover heat and do not automatically need a head.
Capacity must match the layout
Several small heads do not replace a load calculation. The contractor still has to match total capacity, minimum turn-down, line lengths and the outdoor unit's low-temperature performance to the design.
Future expansion
If a basement or addition will be finished later, ask whether the outdoor unit and line layout can accept another head. Planning that route during the first install is usually cheaper than discovering it cannot expand.
What to do next
List bedrooms and main living zones separately.
Note rooms that are always uncomfortable.
Ask the contractor to explain every proposed head location.
Read the full guide
This answer connects to Ductless Heat Pumps, where the full topic is covered with the current Ontario figures and the next checker.
Zone the rooms you actually live in
Bring a room list and photos of the walls where heads could go.
Read the ductless guideQuestions people also ask
How many ductless heads do I need?
Plan on one ductless head for each closed room or distinct zone you want to control independently. Open-plan areas can often share one head, while bedrooms behind doors usually need their own. A typical whole-home design may use three to five heads, but the layout and heat load decide the real number.
Does every bathroom need a head?
Usually not. Small bathrooms often pick up heat from adjacent zones, unless the room is unusually cold or isolated.
Can one head heat two rooms?
Sometimes. It depends on how open the plan is and the size of each space. A contractor should explain why one head can serve both.