Ducted air conditioning is the gold standard for whole-home climate control in Australia, but it comes with a price tag to match. The average ducted air conditioning cost in Australia sits between $10,000 and $16,000 fully installed for a standard three to four bedroom home, though bills can stretch past $20,000 for larger properties or complex layouts. This guide breaks down every cost factor so you know what to expect before calling a licensed air conditioning technician.
Ducted Air Conditioning Cost: The Quick Summary
Here is what most Australian homeowners pay for a fully installed ducted air conditioning system in 2025–2026:
| Home Size | System Capacity | Typical Cost (Installed) |
|---|---|---|
| 1–2 bedrooms / apartment | 7–10 kW | $6,000–$9,000 |
| 3 bedrooms, single storey | 10–14 kW | $9,000–$13,000 |
| 4 bedrooms, single storey | 14–18 kW | $12,000–$16,000 |
| 4–5 bedrooms, double storey | 18–24 kW | $15,000–$22,000 |
| Large home or complex layout | 24+ kW | $20,000–$30,000+ |
These figures include the indoor and outdoor units, ductwork, vents, thermostat, and standard installation labour. Prices vary by brand, location, and installer.
What Affects Ducted Air Conditioning Installation Cost?
Several factors push the ducted air conditioning cost up or down.
Home size and layout. Bigger homes need higher capacity systems with longer duct runs. A double-storey home costs more than a single-storey home of the same floor area because ductwork must be routed to both levels.
Number of zones. Zoning lets you cool or heat specific areas rather than the entire house. A basic single-zone system is cheapest, while a multi-zone setup with motorised dampers adds $1,500 to $3,000 to the total.
Roof space access. Ducted systems are typically installed in the ceiling cavity. If your roof space is tight, has limited access, or requires modification, expect extra labour charges of $500 to $1,500.
Electrical upgrades. Ducted systems draw significant power. If your switchboard needs upgrading to handle the load, add $1,000 to $2,000 to your budget. Some older homes also need new circuits run from the board to the outdoor unit.
Brand and model. Premium brands like Daikin and Mitsubishi Electric sit at the top of the price range. Mid-range brands like Fujitsu and Samsung offer solid performance for less. Budget options from brands like Kelvinator or Carrier cost less upfront but may have shorter warranties.
Existing ductwork. If your home already has ductwork from an older system, replacement costs drop significantly because the installer can reuse or modify existing ducts rather than starting from scratch. Expect to save $2,000 to $5,000 in this scenario.
Ducted Air Conditioning Unit Costs by Brand
The unit itself makes up roughly 40 to 60 percent of the total installed cost. Here are typical supply-only prices for popular brands in Australia:
| Brand | System Size | Unit Price (Supply Only) |
|---|---|---|
| Daikin | 12.5 kW reverse cycle | $4,500–$6,500 |
| Mitsubishi Electric | 12.5 kW reverse cycle | $4,200–$6,000 |
| Fujitsu | 10 kW reverse cycle | $3,000–$4,500 |
| Samsung | 10 kW reverse cycle | $3,500–$5,000 |
| Carrier | 14 kW reverse cycle | $3,200–$4,800 |
| Actron Air | 12.5 kW reverse cycle | $3,500–$5,200 |
Prices change with system capacity. A 7 kW unit will cost less than a 20 kW unit from the same brand. Always compare quotes on the same capacity and model to get a fair comparison.
Installation Labour Costs
Labour for ducted air conditioning installation typically runs between $3,000 and $6,000, depending on the job complexity. Here is how labour costs break down:
| Task | Typical Cost |
|---|---|
| Standard installation (single storey, easy roof access) | $3,000–$4,500 |
| Double storey installation | $4,500–$6,500 |
| Ductwork modification or replacement | $1,500–$3,500 |
| Switchboard upgrade | $1,000–$2,000 |
| Removal of old system | $300–$800 |
| Concrete pad for outdoor unit | $200–$400 |
Hourly rates for air conditioning technicians in Australia range from $80 to $120 per hour, but most installers quote ducted jobs as a fixed price rather than hourly.
Ducted vs Split System: Cost Comparison
If you are weighing up a ducted system against split system air conditioning, here is a side-by-side comparison:
| Factor | Ducted System | Split System |
|---|---|---|
| Upfront cost (whole home) | $10,000–$20,000+ | $6,000–$15,000 (multiple units) |
| Single room cooling | Not cost-effective | $1,200–$4,500 per unit |
| Running cost per hour | $0.60–$1.70 (whole home) | $0.15–$0.60 per unit |
| Aesthetics | Hidden in ceiling, vents only | Wall-mounted indoor unit visible |
| Resale value | Higher perceived value | Moderate |
| Installation time | 1–3 days | 3–6 hours per unit |
| Zoning capability | Built-in with dampers | Each unit is its own zone |
When ducted makes sense. Choose ducted if you want to heat and cool your entire home, prefer a clean look without wall-mounted units, and plan to stay in the property long-term. Ducted systems add genuine resale value.
When split systems win. Choose split systems if you only need to cool one or two rooms, have a tight budget, rent, or want to add cooling in stages. Read our split system AC cost guide for full pricing.
Zoning: What It Costs and Why It Matters
Zoning is one of the biggest advantages of ducted air conditioning. It lets you divide your home into separate climate zones and control them independently, so you are not paying to cool bedrooms while everyone is in the living area.
Basic zoning (2–3 zones) adds $1,500 to $2,500 to your installation cost. This typically includes motorised dampers in the ductwork and a multi-zone controller.
Advanced zoning (4–8 zones) costs $2,500 to $4,000 extra. Premium systems from Daikin (iZone) or Actron Air (ESP Platinum) offer individual room sensors, smartphone control, and scheduling per zone.
Running cost savings from zoning. By only conditioning occupied rooms, zoning can reduce your running costs by 30 to 40 percent compared to running the whole system at once. Over a decade, that easily pays back the extra upfront cost.
Retrofit zoning. If you already have a ducted system without zoning, adding it later costs $2,000 to $4,500 depending on the number of zones and the system brand.
Reverse Cycle Ducted Air Conditioning
Most ducted systems installed in Australia today are reverse cycle, meaning they provide both cooling in summer and heating in winter through a single system.
Cost difference. A reverse cycle ducted system costs roughly 10 to 15 percent more than a cooling-only system. For a 14 kW system, that is an extra $800 to $1,500.
Running efficiency. Reverse cycle systems are the most efficient form of electric heating available. A good reverse cycle system produces 3 to 6 kW of heat for every 1 kW of electricity consumed, making it roughly three to six times more efficient than a bar heater or fan heater.
Climate suitability. Reverse cycle works well across most of Australia. In very cold climates (alpine regions, Canberra winters below minus 5), look for systems rated for low-ambient heating. Brands like Mitsubishi Electric and Daikin offer models that maintain heating output down to minus 15 degrees Celsius.
Running Costs: How Much Does Ducted Air Conditioning Cost to Run?
The ducted air conditioning running cost depends on your system size, energy tariff, and how you use it.
| System Size | Cooling Cost per Hour | Heating Cost per Hour | Estimated Annual Cost |
|---|---|---|---|
| 10 kW | $0.50–$0.90 | $0.40–$0.70 | $600–$1,200 |
| 14 kW | $0.70–$1.20 | $0.55–$0.95 | $800–$1,600 |
| 20 kW | $1.00–$1.70 | $0.80–$1.40 | $1,200–$2,400 |
These estimates assume average electricity rates of $0.30 to $0.35 per kWh and typical usage patterns (6 to 8 hours per day during peak seasons).
Tips to reduce running costs:
- Use zoning to only condition rooms you are using
- Set the thermostat to 24–25 degrees in summer and 18–20 degrees in winter. Each degree outside this range increases running costs by 5 to 10 percent
- Keep doors and windows closed when the system is running
- Clean filters monthly during peak usage. Dirty filters force the system to work harder
- Consider a solar PV system to offset daytime cooling costs. A 6.6 kW solar system can cover most of your daytime air conditioning electricity use
Ducted Air Conditioning Cost by State
Prices vary across Australia due to labour rates, climate demands, and local regulations.
| State | Typical Cost Range (4-Bed Home) | Notes |
|---|---|---|
| QLD | $10,000–$15,000 | High demand, competitive market |
| NSW | $11,000–$17,000 | Higher labour rates in Sydney |
| VIC | $10,000–$18,000 | Strong demand for reverse cycle |
| SA | $10,000–$15,000 | Hot summers drive demand |
| WA | $11,000–$16,000 | Sustained cooling season |
| ACT | $9,500–$16,500 | Cold winters boost reverse cycle demand |
| TAS | $10,000–$15,000 | Heating focus, shorter cooling season |
| NT | $12,000–$18,000 | Year-round cooling, higher trade costs |
With over 7,749 licensed air conditioning technicians listed across Australia on TradieVerify, you can compare qualified installers in your area. Queensland has the largest pool with 4,731 licensed technicians, followed by NSW with 3,018.
How to Get the Best Price on Ducted Air Conditioning
Follow these steps to avoid overpaying:
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Get at least three quotes. Prices for the same job can vary by $3,000 or more between installers. Use TradieVerify to find licensed technicians near you.
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Check the ARCtick licence. Every air conditioning technician in Australia must hold a Refrigerant Handling Licence from the Australian Refrigeration Council (ARCtick) in addition to their state trade licence. Read our guide to hiring a licensed air conditioning technician for details.
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Compare on the same specs. Make sure each quote covers the same brand, model, capacity, and number of zones. A cheap quote on a smaller system is not a real saving.
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Ask about warranty. Most ducted systems come with a 5-year manufacturer warranty on the compressor and a 5-year parts warranty. Some brands offer up to 7 years. Installation warranty (workmanship) should be at least 12 months.
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Install in autumn or spring. Demand for ducted air conditioning installation peaks in late spring and summer. Book during the off-season (March to May or September to October) and you may negotiate a better price.
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Check for rebates. Some states offer rebates or incentives for energy-efficient systems. Victoria’s Energy Upgrades (VEU) program offers rebates on qualifying reverse cycle systems. Check your state government’s energy website for current offers.
Maintenance Costs
A ducted system needs regular servicing to run efficiently and last its full lifespan of 15 to 20 years.
| Service | Frequency | Typical Cost |
|---|---|---|
| Filter clean/replacement | Every 3–6 months | $0 (DIY) to $50 |
| Professional service | Annually | $150–$300 |
| Duct cleaning | Every 3–5 years | $300–$600 |
| Refrigerant top-up (if needed) | As required | $200–$400 |
| Major repair (compressor, fan motor) | As required | $500–$2,500 |
Budget $200 to $350 per year for routine maintenance. Skipping annual servicing can reduce system efficiency by 5 to 15 percent and shorten its lifespan.
Frequently Asked Questions
How much does ducted air conditioning cost for a 4-bedroom house?
For a standard 4-bedroom single-storey home, expect to pay between $12,000 and $16,000 fully installed for a reverse cycle ducted system with basic zoning. Double-storey homes typically cost $15,000 to $22,000 due to additional ductwork and complexity.
Is ducted air conditioning worth the cost compared to split systems?
Ducted air conditioning is worth it if you want whole-home climate control with a clean aesthetic. While the upfront cost is higher than split systems, ducted systems add resale value and are more cost-effective per room when conditioning three or more rooms. For one or two rooms, split systems are more economical.
How long does ducted air conditioning last?
A well-maintained ducted air conditioning system lasts 15 to 20 years. The outdoor compressor unit typically has a shorter lifespan (12 to 15 years) than the indoor components. Annual servicing by a licensed technician helps maximise system life.
Can I add ducted air conditioning to an existing home?
Yes, but it costs more than installing during construction. Retrofitting ducted air conditioning to an existing home adds $1,500 to $4,000 to the total cost due to the additional work required to run ductwork through existing ceiling cavities and walls. Homes with accessible roof spaces are easier and cheaper to retrofit.
How much does it cost to run ducted air conditioning per hour?
Running costs depend on system size and your electricity tariff. For a typical 14 kW system, expect to pay $0.70 to $1.20 per hour for cooling. Using zoning to only cool occupied rooms can cut this by 30 to 40 percent. Setting the thermostat to 24 to 25 degrees rather than 20 degrees also reduces costs significantly.
Do I need council approval for ducted air conditioning?
Generally no. Ducted air conditioning does not usually require council approval for residential installations. However, the outdoor unit must comply with noise regulations, and some councils have setback requirements for how close the unit can sit to a boundary. Heritage-listed properties may need approval. Check with your local council if unsure.
Key Takeaways
- Ducted air conditioning costs $10,000 to $16,000 installed for a typical Australian home, with larger homes reaching $20,000 or more
- Zoning adds $1,500 to $4,000 but saves 30 to 40 percent on running costs
- Reverse cycle costs 10 to 15 percent more than cooling-only but provides year-round climate control
- Running costs sit between $0.50 and $1.70 per hour depending on system size
- Get at least three quotes from licensed technicians and compare on the same brand, model, and capacity
- Budget $200 to $350 per year for maintenance to keep the system running efficiently
Search for licensed air conditioning technicians in your area on TradieVerify to compare quotes from qualified professionals.
Sources
- Australian Refrigeration Council (ARCtick) — Licence Requirements
- QBCC — Mechanical Services Licensing
- Canstar Blue — Ducted Air Conditioning Cost Guide
- ServiceTasker — Ducted Air Conditioning Installation Cost
- Sustainability Victoria — Heating and Cooling Your Home
- Energy Rating — Air Conditioner Running Costs
- Victorian Energy Upgrades — Rebates for Heating and Cooling