Split System Install (2.5kW, back-to-back) cost in Australia
Supply and install a 2.5kW split system where indoor and outdoor units share a wall. Compare modelled costs, what is and isn't included, and city adjustments — then check your own quote against it.
$1,300–$2,800
Midpoint estimate: $2,050 per job
Split System Install (2.5kW, back-to-back) · Sydney. Modelled estimate, not calculated from consumer submissions. GST included; city, suburb and materials differences are assumptions rather than observed prices. Confirm scope and inclusions with the provider.
How this figure is put together
Estimate from our published model, labelled as such; method and city factors on the page.
Modelled estimate. City, suburb and materials factors are assumptions, not observed price differences. Confirm GST, units and inclusions with the provider.
GST is included in this price basis.
No verified observation date for this model.
Existing guide assumptions; not a measured market sample or verified rate card.
National guide, modelled from the Sydney baseline and adjusted by city below.
Before booking: This model assumes materials are included; confirm the actual quote. This model assumes GST is included; confirm the provider’s GST treatment. Agree callout and additional work in the written total.
Materials
This model assumes materials are included; confirm the actual quote.
Unit and standard install included; long pipe runs, two-storey and new circuits extra
GST & fees
This model assumes GST is included; confirm the provider’s GST treatment.
Split System Install (2.5kW, back-to-back) prices by city
City figures apply local cost-of-living adjustments to the national guide.
Split System Install (2.5kW, back-to-back) by city
Modelled ranges, not observed prices. The spread between cities comes from a published city multiplier applied to the national range — it is an assumption about each market, not a measurement of it.
On a small screen, scroll across to see every column.
| City | Typical range | Around |
|---|---|---|
| Sydney | $1,300 – $2,800 | $2,050 |
| Melbourne | $1,196 – $2,576 | $1,886 |
| Brisbane | $1,105 – $2,380 | $1,743 |
| Perth | $1,066 – $2,296 | $1,681 |
| Adelaide | $1,014 – $2,184 | $1,599 |
| Canberra | $1,209 – $2,604 | $1,907 |
| Hobart | $1,066 – $2,296 | $1,681 |
| Darwin | $1,144 – $2,464 | $1,804 |
| Gold Coast | $1,079 – $2,324 | $1,702 |
| Toowoomba | $1,014 – $2,184 | $1,599 |
| Ballarat | $1,092 – $2,352 | $1,722 |
| Bendigo | $1,079 – $2,324 | $1,702 |
| Townsville | $1,105 – $2,380 | $1,743 |
| Mackay | $1,196 – $2,576 | $1,886 |
| Albury-Wodonga | $1,040 – $2,240 | $1,640 |
Before accepting a split system install (2.5kw, back-to-back) quote
Use these questions to agree the scope before comparing totals.
- Work and quantity
- Ask the provider to define the split system install (2.5kw, back-to-back) work, quantity and exclusions in writing.
- Materials
- Unit and standard install included; long pipe runs, two-storey and new circuits extra
- Price basis
- Confirm whether the charge is per job, and how additional work is agreed.
- Final amount
- Confirm callout, access, disposal, making good and GST treatment before approving the work.
FairCost editorial checklist. These are questions to agree with your provider, not promised inclusions.
What pushes a split system install (2.5kw, back-to-back) quote up
Estimate or verified?
Here split system install (2.5kw, back-to-back) prices on this page are modelled estimates using existing guide assumptions, without a reconciled source dataset. An observed range is published only when its numbers are computed from at least 10 eligible submissions with matching scope, tax and materials treatment. Quotes and paid invoices are kept separate. How we build estimates · Submit a price
Who can legally do this job
Licensing and permissions guidance
Air conditioning and refrigeration: checked sources
On a small screen, scroll across to see every column.
| Location | Official source |
|---|---|
| All states | Australian Refrigeration CouncilAnyone who installs, services, decommissions or otherwise handles fluorocarbon refrigerant in your air conditioner must hold a Refrigerant Handling Licence from the Australian Refrigeration Council; handling fluorocarbon refrigerant without the right licence is a strict liability offence. For a standard single-head split system under 18kW cooling capacity, a Restricted Heat Pump — Split Systems — Installation and Decommissioning licence covers installation and decommissioning; multi-head systems, anything above 18kW, and any service or repair that accesses the refrigerant require the full Refrigeration and Air Conditioning licence. The business quoting you also needs a separate Refrigerant Trading Authorisation, which is what permits a business to buy, store or sell refrigerant — it is not the same thing as the technician's licence. Ask for the licence number on your quote and check it in the ARC's public directory before you book. |
| All states | State and territory electrical regulatorsAn ARC refrigerant handling licence covers refrigerant work only — it does not authorise electrical work. Connecting your unit to the home's electrical installation, running a new circuit or adding a protective device at the switchboard is electrical installation work, and must be done by someone holding the electrical worker or contractor licence issued by your own state or territory; there is no national electrical licence. A restricted electrical licence held by a refrigeration technician is narrower again: it generally permits testing, repair and maintenance of the equipment, not new installation wiring. So on a split-system installation expect two separate credentials, and expect the electrical compliance certificate your state requires — if an installer can only produce an ARC number, ask who is doing the electrical work and under which licence. |
| QLD | Australian Refrigeration CouncilThe ARC scheme covers fluorocarbon refrigerants only, so work with an alternative such as a hydrocarbon refrigerant does not require an ARC licence. Queensland is the exception the ARC names: it requires a separate licence for hydrocarbon refrigerant work. If you are quoted a hydrocarbon retrofit or a hydrocarbon system in Queensland, ask which licence the technician holds for that specific refrigerant rather than accepting an ARC number as covering it. The electrical licensing position is unchanged — the refrigerant licence never authorises the electrical connection. |
| Your location | Australian Business Licence and Information ServiceSearch the exact activity and location to find licensing, regulatory and council requirements. Follow through to the named authority and verify the provider separately. This lookup is not confirmation that a provider is licensed or a job is exempt. |
This is not a complete register of requirements. Where a state-specific source has not been checked, use the government lookup. Qualified trade review is pending; no universal licence exemption is asserted.
Other aircon installation jobs
Aircon Installation cost guides by city
Local pricing, licensing and quote checks for aircon installation in each city we cover in detail.
Split System Install (2.5kW, back-to-back): common questions
Split System Install (2.5kW, back-to-back) cost: how much should you pay?+
Are materials included in the price?+
Is GST included?+
How long does it take?+
Does the person doing split system install (2.5kw, back-to-back) need a licence?+
Is this price an estimate or based on real quotes?+
See the full aircon installation picture
Know someone getting quotes for this?
Split System Install (2.5kW, back-to-back) price updates
Register interest in pricing research for this job. Modelled estimates and qualifying reported prices are labelled separately. Update timing is not guaranteed.