Multi-zone mini split cost
A multi-zone ductless mini split, with one outdoor unit serving several indoor heads, costs $4,500 to $8,000 for two zones, $6,500 to $11,000 for three, and $10,000 to $15,000 for a five-zone whole-home system.
Quick answer
$4,500 – $15,0002 to 5 zones, installed
Most multi-zone systems cost $4,500 to $15,000 installed for 2 to 5 zones. Larger homes with 8 zones reach $18,000 to $20,000+.
Cost by number of zones
| Zones | Installed |
|---|---|
| 2 zones | $4,500 – $8,000 |
| 3 zones | $6,500 – $11,000 |
| 5 zones (whole home) | $10,000 – $15,000 |
| 8 zones | $18,000 – $20,000+ |
Multi-zone vs. separate single-zone units
| Multi-zone | Several single-zone systems | |
|---|---|---|
| Outdoor units | One | One per room |
| Upfront cost | Lower for 2 – 4 rooms | Higher |
| If the outdoor unit fails | All zones lose heating/cooling | Only one room affected |
| Efficiency | Slightly lower at partial load | Often higher |
Design tips
- Size each indoor head for its room; don't oversize bedrooms.
- Most outdoor units support 2 to 5 (some up to 8) indoor heads.
- Consider ceiling cassettes or concealed ducted heads for a cleaner look.
- Line-set runs over 25 to 50 feet add cost and may reduce efficiency.
For one-room costs, see Mini split installation cost.
How to get a fair quote
- Get at least three written quotes that list the brand, model number, size (tons or BTU) and efficiency rating.
- Ask whether the price includes permits, removal of the old unit, refrigerant, a new thermostat and any duct or electrical work.
- Ask for a load calculation (Manual J) instead of matching the old unit's size by default.
- Compare labor warranties (1 to 10 years) as well as the manufacturer's parts warranty, and register the equipment.
- Schedule non-urgent work in spring or fall, when contractors are less busy and more willing to discount.
Frequently asked questions
How much does a 3-zone mini split cost?
About $6,500 to $11,000 installed, depending on brand, total capacity and line-set lengths.
How many zones can one mini split outdoor unit run?
Most multi-zone condensers support 2 to 5 indoor units, and some larger models support up to 8.
Is a multi-zone mini split cheaper than central air?
With existing ducts, central air is usually cheaper. Without ducts, a multi-zone mini split is often cheaper than adding ductwork.
Sources
Prices are national averages and typical ranges from published cost data. Your price depends on your home, region, equipment and contractor, so get several written quotes. Heat & Air Costs is not an HVAC contractor; read our disclaimer.