Reviewed by AC Direct Technical TeamUpdated June 5, 20264 min read
The short answerCount one zone per room or open area you want to control independently. An open-plan kitchen and living room can often share one larger head, while closed bedrooms and offices each need their own. Most homes land between two and five zones.
Planning mini split zones room by roomAC Direct HVAC guide
One head per enclosed room; open areas can share a zone.
The simple rule
A zone is a space served by one indoor head with its own thermostat. To count zones, walk your home and mark each space you want to control on its own. Walls and doors are the key: air from one head does not reach well around corners or through closed doors.
Space
Zones
Open kitchen, dining, and living area
Often one larger head
Each closed bedroom
One each
Office, bonus room, or finished basement
One each
What changes the count
Layout
Open floor plans need fewer zones because one head covers a large connected space. Chopped-up older homes need more.
How you use rooms
If you want a cool bedroom at night without cooling the whole house, that bedroom is its own zone. Independent control is the whole point of going ductless.
Putting it together
Add up the spaces, then match them to a multi-zone outdoor unit that supports that many heads, or use single-zone systems for one or two rooms. Size each head to its room as you go.
Shop your size
Shop multi-zone mini splits
Browse systems by the number of zones they support.
See the multi-zone mini splits AC Direct carriesCurrent pricing shows on every product page.
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