A split system replacement in Cairns starts from $1,480 incl. GST for a small 2.5kW back-to-back replacement, up to about $3,500 for a larger system. Ducted replacements start from $13,500, and a brand new ducted system from $20,000. Every install includes free anti-rust treatment and our 10-Year Workmanship Warranty.
| Type of job | Starting price | Notes |
|---|---|---|
| Split system replacement | from $1,480 | incl. GST, small 2.5kW back-to-back. Larger systems up to about $3,500. |
| New split system install | Quoted on the job | Costs more than a replacement as it includes new pipework, electrical and penetrations. |
| Multi-split system | Quoted on rooms | Two to five indoor units on one outdoor unit. |
| Ceiling cassette system | Quoted on the job | Recessed ceiling units for open living areas and larger rooms. See ceiling cassette air conditioning. |
| Ducted system replacement | from $13,500 | Depends on home size, zones and the system you choose. |
| New ducted system | from $20,000 | Whole-home, custom designed for your layout. |
Split system installation costs in Cairns
The biggest factor is whether it's a replacement or a brand new install. A split system replacement (replacing an existing unit in the same spot) is the cheapest option because much of the setup, like the wall penetration, drain and power, is usually already in place. These start from $1,480 incl. GST for a small 2.5kW bedroom system and run up to about $3,500 for larger living-area units.
A brand new install costs more, because it includes new pipework, electrical, drainage and wall or roof penetrations. Multi-split systems (several indoor units on one outdoor unit) sit higher again, depending on how many rooms you're cooling. More on our split system installation page.
Ducted air conditioning installation costs in Cairns
Replacing an existing ducted system starts from $13,500. A brand new whole-home ducted system starts from $20,000. What moves the price:
- The size of your home and the number of zones
- The brand and capacity of the system
- Available ceiling and roof space for ducting
- Whether it's a replacement, new build, renovation or retrofit
- Smart control like AirTouch 5 zoning
What changes the price
Two homes rarely cost the same to fit out. Beyond the system itself, the things that move a quote up or down include access and height (high-set Queenslanders take more planning), the run length for pipework, electrical upgrades, the number of rooms, and the brand and efficiency you choose. Coastal homes also benefit from anti-rust protection, which we include free as standard.
Replacing an old system? Factor in running costs
If your current unit is more than about 10 years old, a modern inverter system can use roughly 30% less power for the same cooling. That saving comes back to you every month the system runs. See old vs new running costs in Cairns.
Should you supply your own unit?
Usually it doesn't save money. Because we have trade-only supplier relationships, our supply-and-install price is often the same as, or cheaper than, buying retail and arranging an installer separately, and you keep one team accountable with full warranty. Buying your own also risks the wrong size and missing full manufacturer warranty.
Finance options
If you'd rather spread the cost, we offer no-deposit, interest-free finance through humm on approved applications. Ask us about it when you get your quote and we'll walk you through it.
The short version
Split system replacements in Cairns: from $1,480 incl. GST, up to about $3,500. Ducted replacements: from $13,500. New ducted: from $20,000. Your exact price comes from a free, itemised quote.
Related: Air conditioner replacement · What size air conditioner do I need? · Ducted vs split system · All FAQs