Multi-Head Split System Installation Cost Brisbane (2026) — From $4,200
Installer’s price guide for multi-head split system installation in Brisbane — pricing by number of heads, what’s included, what bumps the price up, and how it compares to multiple single splits.
Quick answer: From $4,200 fully installed for a 2-head multi (2×2.5kW). From $5,800 for 3-head, $7,200 for 4-head, $9,500+ for 5-head. Typically $800–$1,500 more than equivalent capacity in separate single splits — the premium pays for one outdoor unit and cleaner exterior aesthetic.
Brisbane multi-head pricing (2026)
| Configuration | Indoor heads | Outdoor capacity | Fully installed (from) |
|---|---|---|---|
| 2-head dual | 2×2.5kW | 5kW | From $4,200 |
| 2-head mixed | 2.5 + 5kW | 7.5kW | From $4,800 |
| 3-head balanced | 3×2.5kW | 7.5kW | From $5,800 |
| 3-head mixed | 2.5 + 3.5 + 5kW | 8–10kW | From $6,400 |
| 4-head | 4×2.5kW or mixed | 10–11kW | From $7,200 |
| 5-head | 5 mixed | 12–14kW | From $9,500 |
| 6+ head premium | 6+ | 14kW+ | Quote on site |
Prices fully installed inc GST with standard back-to-back pipe runs. Final price depends on pipe-run lengths to each head, brand, electrical, and site conditions.
What’s included in the install
- Outdoor compressor unit (sized to match total indoor capacity)
- Each indoor head (capacity-specific)
- Refrigerant pipework to each head (insulated copper, up to 5m per head)
- Condensate drain lines (gravity or pump as required)
- Electrical hookup — one circuit to outdoor unit
- Wall brackets / floor stands as required
- Standard mounting brackets for indoor units
- Refrigerant charge, vacuum, pressure test
- Commissioning + run-test on cool and heat at every head
- 10-year workmanship warranty
- Manufacturer warranty registration (5-yr typical)
What pushes price up
- Long pipe runs — indoor heads more than 5m from outdoor unit add $80/m per run
- Through-roof pipe runs for 2-storey installs — from $250
- New electrical circuit if existing doesn’t meet load — from $480
- Drain pump on indoor heads without gravity drain — from $220 per head
- Premium brand upgrade — Mitsubishi Heavy / Daikin Alira adds $400–$800
- Designer or larger indoor heads — cassette or floor console in lieu of wall heads, add $400+ per head
- Body corp approvals / scaffolding — quote on site
- Old unit removal — from $150 bundled
Brand-by-brand multi-head pricing (3-head balanced, fully installed)
- Daikin MX — from $5,800. Most flexible indoor-capacity mixing (different kW heads on one outdoor).
- Mitsubishi Electric MXZ — from $6,000. Quietest indoor heads.
- Fujitsu AOTG — from $5,500. Best value in the Japanese tier.
- LG MU — from $5,800. WiFi standard on premium models.
- Panasonic CU — from $6,000. nanoe X air purification on premium models.
Multi-head vs separate splits — honest math
Multi-head is typically $800–$1,500 more expensive than the equivalent capacity in separate single splits. What you’re paying the premium for:
- One outdoor unit instead of multiple (aesthetic + space)
- One electrical circuit instead of multiple
- One refrigerant system to maintain
- Body corp approval easier (fewer external units)
What you’re giving up:
- Failure isolation — outdoor compressor failure takes all heads offline
- Mode independence — most consumer multi-heads can’t run cool and heat simultaneously across heads
- Parts simplicity — multi-head specialised parts vs commodity single-split parts
- Future expansion — adding a fifth head later may need a bigger outdoor unit
Full comparison in our multi-head vs single splits guide.
When multi-head is the right call
- Apartments / townhouses — limited outdoor space; multi-head often the only configuration that fits
- Narrow side passage homes — one outdoor unit fits where 3 wouldn’t
- Body corp restrictions — some buildings limit external compressor count
- Aesthetic priority — cleaner exterior with one unit
- Cluster of rooms on one side of house — tidier pipe runs from one outdoor
Common questions
How much does multi-head split installation cost in Brisbane?
From $4,200 fully installed for a 2-head install. From $5,800 for 3-head, $7,200 for 4-head, $9,500+ for 5-head. Larger configurations quoted on site.
Is multi-head cheaper than multiple single splits?
No — typically $800–$1,500 more expensive than equivalent capacity in separate splits. Multi-head wins on aesthetics, outdoor footprint, and electrical simplicity, not on price.
What’s included in the install price?
Outdoor unit, each indoor head, refrigerant pipework, drain lines, electrical, brackets, refrigerant charge, vacuum, pressure test, commissioning, 10-year workmanship warranty.
How long does multi-head installation take?
1 day for a 2-head install. 1.5 days for 3-head. 2 days for 4-head. Larger configurations take longer.
Can I mix different capacity heads?
Yes — e.g. 2.5kW for a bedroom + 5kW for living room off one outdoor unit. Daikin MX is the most flexible for mixed capacities. Manufacturer spec sheets show valid combinations.
Can different heads run different modes?
Most consumer multi-heads can only run all heads in the same mode (all cool, all heat) at one time. Premium “heat-recovery” multi-heads allow mixed modes but cost significantly more — mostly used in commercial.
Is finance available?
Yes — Brighte and Humm both offer 0% interest over 12–24 months on residential AC, on approval.
AH Air Conditioning · 63 Britannia Ave, Morningside QLD 4170 · ARCtick licensed · 20+ years across Brisbane.