Plan the Full Cost of Air Conditioning
Plan the equipment, installation and ongoing costs together. Ask for an itemised quote for your home, then compare the proposed models, work and exclusions on the same basis. A published starting price only applies to the job described.
Compare scope
Equipment and installation belong in the same written proposal.
Check ongoing costs
Use the model’s energy figures and your electricity tariff.
Plan for your home
Confirm sizing, positions and property requirements.
Before booking
Read exclusions, warranty and any incentive conditions.
Compare Split, Multi-Head and Ducted Systems
Start with the spaces you want to cool, whether you also need heating and which rooms are used together. The Energy Rating heating and cooling guide recommends discussing appropriate systems, capacity and placement with suppliers.
| System | What you are comparing | Ask the supplier |
|---|---|---|
| Single split system | One indoor unit connected to an outdoor unit for a room or open area. | Which model and placement suit the space? |
| Multi-head or multi-split | Several indoor units connected to one outdoor unit. | How will the proposed combination perform when rooms run together? |
| Ducted system | Air distributed through ducts and outlets, with controls and possible zoning. | Which rooms, outlets and zones are included, and can the property accommodate the design? |
Compare the complete installed scope for each option. The number of rooms alone does not establish a budget, the best layout or the required capacity. Our Split System vs Ducted guide covers layout decisions in more detail.
What an Air Conditioning Installation Quote Should Include
Give each supplier the same project brief and ask for a written, itemised proposal. Check the equipment and the work together so a low headline price does not hide a different scope.
| Quote item | Details to compare | Questions before booking |
|---|---|---|
| Equipment | Exact indoor and outdoor models, quantities and controls. | Is supply included, and which warranty terms apply? |
| Placement and access | Proposed positions, site access and drainage. | Has the installer assessed the actual property? |
| Connections | Pipe and cable routes, included lengths and access work. | What could require extra materials or labour? |
| Electrical work | Assessment of the supply and any proposed circuit or switchboard work. | Is the required work itemised and who will carry it out? |
| Ducts and zoning | Ducts, outlets, zones and controls where applicable. | What is new, reused or excluded from the design? |
| Replacement work | Removal, disposal and repairs to affected surfaces. | Are these included or separately quoted? |
| Handover | Testing, operating instructions and applicable compliance documents. | What will you receive on completion? |
One published installation example
On 14 October 2026, The Good Guys installation page listed a WA single-storey, back-to-back service for a system under 4 kW from AUD $599. This is an installation-only starting price: the air conditioner and delivery are excluded. Its scope has limits on materials and cable/pipe lengths; non-standard positions, multi-storey work, wider electrical upgrades, brackets, old-unit disposal and surface repairs are additional or excluded.
Use this retailer example to see how scope affects price. Confirm its current terms and your property's suitability directly; it is an indicative offer for the described job, not a national average or a Wombat quote.
Compare Running Costs Using the Model and Your Tariff
Cooling or heating capacity in kW describes the heat a system can move. It is different from electrical power use. A unit's advertised capacity multiplied by operating hours will not give a sound electricity bill estimate.
The Zoned Energy Rating Label guide explains climate-specific energy estimates. Compare suitably sized models using the relevant climate zone and keep heating and cooling figures separate. For a simple comparison, multiply the label's estimated annual energy use in kWh by your variable electricity tariff in dollars per kWh.
That is a comparative estimate, not a prediction of your home's bill. Actual use depends on conditions and how you run the system, and an account may have additional charges. Use the official Energy Rating Calculator to compare models, then check the electricity-plan assumptions against your bill.
Ducted and multi-split systems may not display the same label. Ask for documented performance information for the exact proposed combination rather than applying a blanket star requirement or savings percentage.
Compare Models, Warranty and Service Support
Compare the actual model, proposed installation and written support terms. Useful questions cover local-climate performance, noise information, controls, parts availability and who will handle service or a warranty claim.
Avoid treating a brand's price tier as evidence of reliability or service life. For example, the Kelvinator KSD50HWJ model page lists a five-year domestic parts-and-labour warranty. Check the current terms for the model you are considering.
Read equipment and installation warranties separately, including labour, call-outs and maintenance conditions. The ACCC warranty guide explains that warranties are additional to consumer guarantees. Warranty length and expected service life are different questions.
Check Access, Permissions and Neighbouring Properties
Your location matters through the actual job: access, outdoor-unit position, weather exposure, pipe routes, electrical supply and applicable property rules. Ask the supplier to assess those constraints rather than applying a city-wide price premium.
Confirm council, state or territory and strata requirements before committing to equipment placement. As a jurisdiction-specific example, NSW Planning installation guidance explains when installation can be exempt development and the standards it must meet. Heritage, strata and other property circumstances need their own check.
Ask how the proposed outdoor unit will meet the local noise rules and what its quoted sound figures measure. NSW EPA neighbourhood-noise guidance includes operating restrictions and other conditions; one national boundary decibel limit or approval turnaround would be misleading.
Size the System for the Home
The Victorian reverse-cycle buyers guide recommends an onsite load assessment. Ask the supplier to consider room use, construction, insulation, glazing, ceiling height, orientation and local climate, and to explain the proposed heating and cooling capacities.
Room area is one input. It does not justify stacking fixed percentage adjustments or adding a generic oversizing allowance. For multi-head and ducted proposals, ask how simultaneous room use, ducts and controls affect the design.
Check the exact model's performance in your conditions and where its indoor and outdoor units will fit. A system chosen for an individual room and one intended for the whole home need different assessments.
Check Current Air Conditioning Incentives
Some installations can qualify for discounts or rebates, but the amount and process depend on the programme, property, product and provider. Confirm eligibility early and have the incentive named in the written quote with the remaining payment.
| Selected programme | Starting point | What to confirm |
|---|---|---|
| Victoria | VEU heating and cooling discounts | Eligible product and upgrade, accredited provider or partner installer, and current offer terms. |
| NSW | Air conditioner upgrade incentive | Eligible system and provider; complete the nomination form before installation. |
| South Australia | REPS energy-saving activities | Which eligible heating or cooling activity a participating provider currently offers. |
Use the national rebates and assistance finder for other locations and support. An upfront discount, later rebate and repayable loan have different terms; do not assume they can be combined.
The Clean Energy Regulator heat-pump STC page concerns eligible water-heating systems. It does not establish an STC discount for room air conditioning.
Plan for Maintenance and Future Decisions
Keep the model details, quote, invoice, warranty and handover documents. Follow the manufacturer's care and servicing instructions, including filter care. The YourHome heating and cooling guide recommends servicing equipment according to those instructions.
Ask what service support is available locally, what a service visit includes and whether labour, call-outs or parts are covered by the written terms. There is no single annual maintenance budget or replacement age established by this guide.
If an existing system has problems, seek an itemised assessment before choosing repair or replacement. Compare the diagnosed issue, proposed work, available parts and replacement scope. Compare the actual repair and replacement proposals instead of assuming a fixed service life or resale return.
Before You Accept an Installation Quote
Use this final check to resolve gaps with the supplier before booking:
- Your rooms, use and sizing assessment are understood.
- The exact model combination, controls and equipment positions are recorded.
- Required permissions, noise conditions and access have been checked.
- The total scope, exclusions, possible variations and confirmed incentives are clear.
- Equipment and installation warranty, handover and service arrangements are in writing.
- You have checked relevant licences and insurance for the work.
For refrigerant work, use the ARC licence check to check the technician's current licence and scope, and check any other required trade licences separately. The Wombat checks supplier ABNs; homeowners should check the credentials and cover relevant to their job.
Sources and Checks
Consumer, regulator, manufacturer and programme guidance was checked on 14 October 2026. The retailer example is a published starting offer for its stated scope. Confirm current terms, property requirements and model suitability before booking.
- Energy Rating system selection
- Zoned Energy Rating Label method
- Official Energy Rating Calculator
- YourHome heating, cooling and care
- ARC refrigerant licence check
- NSW Planning installation conditions
- NSW EPA neighbourhood noise
- ACCC warranties and consumer guarantees
- Kelvinator KSD50HWJ model warranty
- CER water-heating STC scheme scope
- NSW air conditioner upgrade incentive
- VEU heating and cooling discounts
- SA energy-saving activities
- National rebates and assistance finder
- The Good Guys installation example
- Victorian reverse-cycle sizing guide
