Split system vs ducted air conditioning: the complete 2026 cost and efficiency guide
It's not always ducted. Sometimes the maths says zoned splits. Here's the honest comparison.
Installing air conditioning is one of the most significant home improvement decisions Australian homeowners face. Should you cool individual rooms with split systems, or install a whole-home ducted solution?
Cost comparison (2025-2026 figures)
- 01Single split system (supplied and installed): $1,500 to $5,000 depending on capacity and wall accessibility.
- 02Multi-split system (2 to 4 rooms): $2,500 to $6,000.
- 03Ducted system (3 to 4 bedroom home): $8,500 to $15,000+, including zoning and commissioning.
- 04For the same number of rooms, ducted typically costs 2.5 to 3 times more than equivalent split system coverage.
Running costs and efficiency
Split systems let you cool only occupied rooms, delivering significant energy savings for homes where usage is concentrated.
Ducted systems with zoning allow room-by-room temperature control but have higher standby losses through ducts, especially if ducts are older than 10 to 15 years and may be leaking cool air into the roof cavity.
When split system wins
Small homes, apartments, cooling 1 to 3 rooms, home offices, budget-conscious installations, or situations where you prefer room-by-room independent control.
When ducted wins
Whole-home climate consistency, large family homes with 4+ rooms, seamless aesthetics (vents in ceiling, no wall units) and properties where resale value is a consideration.
The middle ground
Multi-split systems (one outdoor unit, multiple indoor heads) can bridge the gap for 3 to 4 room cooling at roughly 50 to 70% of the cost of a comparable ducted setup.
From Amali Electric
We conduct a site assessment, calculate your heating and cooling load requirements, and recommend the right system type and kilowatt capacity for your specific property.