How much does split system installation cost in Brisbane?
Split system installation in Brisbane starts at about $1,000 for a small single-head unit and runs to around $7,500 for a multi-head system in 2026 — supply-and-install, GST inclusive.
This is a deep-dive on split system installation cost in Brisbane. For every system type and the full Brisbane pricing picture, see the main Brisbane air conditioning cost guide →
Split install cost by configuration
Split system installation in Brisbane is priced by the unit's cooling capacity (in kW) and how far the indoor head sits from the outdoor unit. These are supply-and-install prices, GST inclusive.
| Split configuration | Low | Typical | High |
|---|---|---|---|
| 2.5 kW split (1 room) | $1,000installed | $1,400 | $1,900 |
| 5 kW split (living area) | $1,500installed | $2,000 | $2,500 |
| 7 kW split (large open-plan) | $2,500installed | $3,000 | $3,500 |
| 9 kW split (whole-floor) | $3,000installed | $3,500 | $4,000 |
| Multi-head split (2 rooms) | $4,000installed | $5,500 | $7,500 |
Pick the kW for the room, not the price tag — an undersized unit runs flat-out in a Brisbane summer and costs more to run. A 2.5 kW head handles a bedroom; 5 kW suits a living area; 7–9 kW covers large open-plan spaces.
Standard install vs long pipe run or high wall
The single biggest install variable is the pipe run. A back-to-back install — indoor head mounted on the same wall the outdoor unit backs onto — sits at the low end of each range because the refrigerant pipe run is short. A longer run to reach the outdoor unit, a high-wall or ceiling cassette head, or an outdoor unit that needs a roof or bracket mount all push you toward the high column. Ask any quote whether it assumes a standard back-to-back install.
Supply-and-install vs install-only
Most Brisbane prices above are supply-and-install — the installer provides the unit. If you buy your own unit and want install-only, you'll pay labour, mounts, pipe, electrical and commissioning separately, and you carry the warranty risk if anything's wrong with the unit. For most homeowners a bundled supply-and-install is simpler and keeps a single point of accountability — if the unit fails, one company owns both the hardware and the workmanship. Buying your own unit can make sense if you've found a genuine clearance deal, but confirm the installer will still warrant their labour on a unit they didn't supply before you commit. Comparing a few rooms? TheBrisbane installation cost guide shows every system type side by side, and the ducted system cost guide covers the whole-home option.
How many splits before ducted makes sense?
There's a crossover point: once you're fitting three or four splits to cool most of a home, a multi-head system — or even a basic ducted system — can cost about the same and look tidier, with one outdoor unit instead of several. As a rule of thumb in Brisbane, one or two rooms favour single splits; three-plus rooms is worth pricing against multi-split and ducted before you commit.
Getting the sizing right
Under-sizing is the most common and most expensive split-system mistake in Brisbane — a unit that's too small runs at full tilt through summer, wears faster and costs more to run. Match the kW to the room's size, aspect and glazing, and size up slightly for west-facing or poorly insulated rooms rather than down. A single split is a half-day install and usable the same day; a multi-head runs a full day, and installers book two to four weeks out through the summer peak. If a room gets harsh afternoon sun, tell the installer — it changes the kW they should quote.
Related Brisbane guides
- Installation cost by type — every system type's install price.
- Ducted system cost — the whole-home alternative to multiple splits.
- Brisbane air conditioning cost guide — the full city cost guide this deep-dive sits under.
- national air conditioning cost guide — national pricing across every city.
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