What Does Ducted Air Conditioning Cost in Australia?
Ducted air conditioning costs in Australia typically range from $5,000 to $20,000 or more for a fully installed system, depending on the size of your home, the brand you choose and how complex the installation is. That's a wide spread, so this guide breaks it down into four practical areas: unit cost by system capacity, the installation factors that push prices up or down, how major brands compare on price, and what you'll pay to run the system day to day.
The goal here is to give you real numbers you can use, not ballpark figures so vague they're useless. Whether you're getting quotes from installers or just trying to understand what a fair price looks like, you'll find specific figures throughout.
Key takeaways
- Ducted air conditioning cost ranges from $5,000 to $20,000 installed depending on system size and brand.
- Installation labour typically adds $2,000 to $6,000 on top of the unit price.
- Buying supply-only and arranging your own installer can reduce total ducted air conditioning cost significantly.
Ducted Air Conditioning Price Ranges by System Size
The single biggest driver of ducted air conditioning cost is system capacity, measured in kilowatts. A small home under 150 square metres needs a very different system to a large two-storey house over 350 square metres, and the price difference is significant. The table below shows indicative supply-only unit prices alongside estimated fully installed costs across four common capacity tiers.
| System Capacity (kW) | Typical Home Size | Supply-Only Price (AUD) | Estimated Installed Cost (AUD) |
|---|---|---|---|
| Up to 10kW | Up to 150 sqm | $3,320 to $4,746 | $5,000 to $9,000 |
| 10 to 14kW | 150 to 250 sqm | $4,500 to $5,500 | $7,500 to $12,000 |
| 14 to 18kW | 250 to 350 sqm | $5,500 to $7,000 | $10,000 to $16,000 |
| 18kW+ | 350 sqm and above | $7,000 and above | $14,000 to $20,000+ |
To give you a sense of real supply-only prices: the Daikin 10kW Premium Inverter Ducted Air Conditioner (FDYA100AV19) retails at $4,746, while the Samsung 10kW Duct S2+ Inverter Ducted Air Conditioner (Three Phase) comes in at $3,320 for the same capacity tier. That $1,400 gap between brands at the same kilowatt rating shows how much brand and feature set can shift the unit price alone.
Moving up in size, the Daikin 16kW Premium Inverter Ducted Air Conditioner (FDYA160AV19) is priced at $6,713 supply-only, which sits squarely in the 14 to 18kW bracket. Add installation labour and you're looking at $10,000 to $16,000 all up for a home in that size range.
Installation labour typically adds $2,000 to $6,000 on top of the unit price, depending on roof space access, the number of zones, duct runs required and your location. These are indicative ranges only. Your actual quote will vary based on your installer and state, so always get at least two or three quotes before committing.
Supply-Only vs. Fully Installed: What's the Difference?
'Supply-only' refers to the cost of the unit itself, which is what you pay when purchasing from an online retailer like AusAir. 'Fully installed' covers everything else: labour, ductwork, ceiling grilles, electrical work and commissioning by a licensed technician.
Buying supply-only and arranging your own installer is a common way Australians reduce the total cost of a ducted system. Online retailers operate with lower overheads than bricks-and-mortar stores, so the unit price is often meaningfully cheaper. You then source a local licensed installer to handle the fit-out. Browse our full range of ducted air conditioners to compare prices across brands and capacity tiers before you start getting installation quotes.
Just make sure your installer is happy to work with a customer-supplied unit before you purchase. Most are, but it's worth confirming upfront.
What Affects the Cost of Installing a Ducted System?
Five main factors determine where your ducted air conditioning installation quote lands: home size, the number of zones, whether you have existing ductwork, your electrical setup and the brand and system tier you choose. Understanding each one helps you spot whether a quote is reasonable or whether you're being overcharged on a particular line item.
Home Size and Ceiling Layout
The larger your home, the more ductwork, ceiling grilles and refrigerant piping the installer needs to run. A single-storey home under 150 square metres is relatively straightforward. A two-storey home over 300 square metres requires significantly more materials and labour, and the ceiling cavity layout matters too. Tight or obstructed roof spaces slow the job down and push costs up.
Number of Zones
Zoning lets you control which rooms receive conditioned air, so you're not cooling an empty bedroom while you're watching TV in the lounge. Each zone adds cost through motorised dampers, additional wiring and a zone controller. The Daikin Zone Controller, for example, is an additional line item buyers often overlook: the 4-zone version (BRC24Z4B) retails at $433 and the 8-zone version (BRC24Z8B) at $556. That's before installation labour. The trade-off is real though. A properly zoned system can cut running costs noticeably over time by only conditioning the spaces you're actually using.
Existing Ductwork
Retrofitting a ducted system into an established home is almost always more expensive than installing into a new build. Older homes may have no ductwork at all, meaning the installer starts from scratch. Even homes with existing ducts from a previous system often need sections replaced or resealed to meet current standards. Budget for this possibility if your home is more than 15 to 20 years old.
Electrical Upgrades
Larger ducted systems, particularly those above 14kW, can require a three-phase power supply. Many Australian homes run on single-phase power, so if your switchboard needs upgrading to accommodate a bigger system, that's an additional cost on top of the air conditioning installation itself. A licensed electrician will need to assess your switchboard before the installer can confirm compatibility. This is a cost that catches a lot of buyers off guard.
Brand and System Tier
As the pricing table in the previous section shows, there's a meaningful gap between value-tier and premium-tier systems at the same kilowatt rating. Daikin ducted systems are available in capacities from 7.1kW to 25kW and sit at the premium end of the market, with higher upfront costs offset by strong energy efficiency ratings and long-term reliability. A cheaper unit from a lesser-known brand might save you $1,000 to $2,000 upfront but cost more to run each year and carry a shorter warranty. It's worth factoring in the full five-year picture, not just the sticker price.
Ducted vs. Split System: Which Is Worth the Cost?
Ducted air conditioning is not the right choice for every home. For larger homes where whole-home climate control is the goal, ducted is hard to beat on comfort and aesthetics. For smaller homes, apartments or single rooms, a split system delivers the same cooling and heating at a fraction of the cost and complexity. The table below lays out the key differences so you can make a direct comparison.
| Factor | Ducted System | Split System |
|---|---|---|
| Upfront Cost | $5,000 to $20,000+ installed | $1,000 to $4,500 installed |
| Installation Complexity | High. Requires ductwork, ceiling grilles and zoning wiring | Low to moderate. One indoor and one outdoor unit per room |
| Whole-Home Coverage | Yes. One system serves the entire home | No. Each unit covers one room or open-plan area |
| Aesthetics | Fully hidden. Only ceiling grilles are visible | Visible wall-mounted indoor unit in each room |
| Zoning Capability | Yes. Motorised dampers let you control individual rooms | Limited. Each unit operates independently per room |
| Best Suited For | Homes with 3+ bedrooms, new builds or major renovations | Apartments, smaller homes or targeted room-by-room cooling |
The honest answer is that ducted makes financial sense when you need to condition most of your home most of the time. If you're only ever cooling two or three rooms in a four-bedroom house, a multi-head split system is worth serious consideration as a middle-ground option. A multi-head setup uses one outdoor unit connected to multiple indoor units, giving you room-by-room control without the ductwork cost or the ceiling cavity access requirements.
For smaller homes or apartments, split system air conditioners are a more cost-effective starting point, with installed prices typically sitting between $1,000 and $4,500 depending on capacity and brand. You can always add units room by room as your budget allows, which isn't an option with a ducted system where the whole installation happens at once.
Running Costs: What to Budget After Installation
A ducted air conditioning system typically uses between 2kW and 6kW of electricity per hour at partial load, rising to the full rated capacity during peak demand. At current Australian electricity rates of roughly 25 to 34 cents per kWh depending on your state, a 10kW system running eight hours a day could cost anywhere from $7 to $10 per day in electricity alone. Over a full cooling or heating season, that adds up quickly.
Inverter technology makes a significant difference here. A fixed-speed system runs at full power until the target temperature is reached, then cuts out completely. An inverter system ramps its output up and down continuously to maintain temperature, which uses considerably less electricity over the course of a day. Most modern ducted systems use inverter compressors as standard, but it's worth confirming this when comparing quotes.
Zoning is the other major lever for controlling running costs. A properly zoned system lets you shut off airflow to unoccupied rooms, so you're not paying to cool an empty guest bedroom or study. In a four-bedroom home where only two or three rooms are in use at any given time, zoning can meaningfully reduce your daily electricity spend compared to running the whole system at full capacity.
Beyond electricity, factor in annual servicing as a recurring cost. A professional ducted system service typically runs $150 to $300 per year, covering filter cleaning, coil inspection and refrigerant checks. Skipping annual maintenance tends to reduce efficiency and shorten system life, so it's a cost worth budgeting for. For a full breakdown of what aircon maintenance costs, including regas, read our guide to aircon regas costs.
Frequently Asked Questions About Ducted Air Conditioning Cost
How much does ducted air conditioning cost in Australia?
A fully installed ducted air conditioning system in Australia costs between $5,000 and $20,000 or more, depending on the size of your home, the brand you choose and the complexity of the installation. Supply-only unit prices start around $3,300 for a 10kW system, with installation labour adding $2,000 to $6,000 on top. Larger homes over 300 square metres should budget toward the upper end of that range. Brands like Daikin and Mitsubishi Heavy Industries ducted systems are among the most popular choices for Australian homes.
How much is a Daikin 16kW ducted system installed?
The Daikin 16kW Premium Inverter Ducted Air Conditioner (FDYA160AV19) retails at $6,713 supply-only. Add installation labour of $3,000 to $6,000 and you're looking at a total installed cost of roughly $10,000 to $13,000 for a straightforward installation in a home of 250 to 350 square metres. Homes requiring electrical upgrades, difficult roof access or extensive ductwork will sit toward the higher end of that range.
Is ducted air conditioning worth the cost?
For homes with three or more bedrooms where whole-home climate control is the goal, ducted air conditioning is generally worth the upfront investment. The system is fully hidden, operates quietly and can be zoned to reduce running costs over time. For smaller homes or apartments, a split system or multi-head split system will deliver similar comfort at a fraction of the cost and is usually the more practical choice.
How much does it cost to run ducted air conditioning per day?
Running costs depend on system size, how long you run it and your local electricity rate. A 10kW ducted system running eight hours a day at around 30 cents per kWh costs roughly $7 to $10 per day. An inverter system running at partial load will sit toward the lower end of that range. Zoning unused rooms and setting sensible temperature targets (around 24 to 26 degrees in summer) will also keep daily costs down.
Ready to Compare Ducted Air Conditioning Prices?
Ducted air conditioning is one of the bigger investments you'll make in a home, with fully installed costs ranging from $5,000 for a compact 10kW system up to $20,000 or more for a large home. Buying the unit supply-only from a competitive online retailer and pairing it with a local licensed installer is one of the most practical ways to keep that total cost in check, without compromising on brand quality or system performance.
AusAir stocks all major brands across every capacity tier, from value-focused options like the Samsung 10kW Duct S2+ at $3,320 through to premium Daikin systems like the FDYA160AV19 at $6,713. Browse the full range, compare prices across brands and capacity tiers, and get your unit price locked in before you start collecting installation quotes.
