If you have started comparing ducted air conditioning quotes, you may have noticed something confusing: two installers can look at the same home and come back with prices that differ by several thousand dollars. That does not necessarily mean one quote is overpriced or the other is a bargain.
A ducted air conditioning quote covers far more than the indoor and outdoor units. The final price can change depending on system capacity, ductwork, zoning, the controller, electrical requirements, roof access, the number of storeys, and the amount of labour involved.
At ClimateLink, we design and install ducted air conditioning systems across Logan, South Brisbane, and surrounding areas. When we prepare a quote, we look at how the home is built, what capacity it needs, and how the household wants to use the system. Here is what actually goes into a ducted air conditioning quote, and why prices can vary so much.
Why Can Ducted Air Conditioning Quotes Be So Different?
A ducted system is not an off-the-shelf product that can be installed identically in every home. Two properties with a similar floor area may still need very different installations.
The final quote can be affected by:
- System capacity
- Brand and model
- Number of zones
- Controller type
- Amount of ductwork
- Number and type of air outlets
- Electrical work
- Roof access
- Single-storey or double-storey construction
- Existing obstructions
- Installation labour
That is why comparing only the total price at the bottom of a quote can be misleading.
What Do Ductwork and Zoning Add to the Price?
Ductwork is a significant part of a ducted air conditioning installation.
Depending on the home, the system may require:
- Insulated flexible ducting
- Supply-air outlets
- Return-air grilles
- Plenums and fittings
- Dampers
- Zone motors
- Control cabling
- Ceiling diffusers
Larger homes generally need more ductwork, more outlets, and more labour. The design matters too. Duct sizes, duct lengths, airflow, outlet placement, and return-air design all affect how well the system performs.
How much does an additional zone cost?
As a general guide, a standard additional zone can add approximately $450 to the project.
Zoning allows you to control different areas of the home independently. For example, bedrooms, living areas, offices, or guest rooms can be separated rather than conditioning the entire home at once.
More zones increase the upfront cost, but they can also give you much better control over comfort and energy use.
How Much Does MyAir or a Smart Controller Add?
The controller is another reason two quotes may look different. A basic wall controller may be sufficient for some homes, while others benefit from a more advanced smart system. A controller such as MyAir will generally add around $1,200 to $1,800 to the installation.
Depending on the setup, smart controllers can provide individual zone control, scheduling, adjustable airflow, and centralised control. If one quote includes a standard controller and another includes MyAir, you are not comparing the same specification.
How Much Does Installation Labour Cost?
Specialised ducted air conditioning installation labour commonly ranges from around $2,500 to $5,000+, depending on the complexity of the job. A straightforward single-storey home with generous roof access will generally require less labour than a difficult retrofit.
Labour can increase when installers need to work around:
- Tight roof spaces
- Flat or low-pitched roofs
- Complex trusses
- Existing electrical wiring
- Plumbing
- Limited access
- Double-storey construction
- Difficult duct routes
This is one of the biggest reasons similarly sized homes can receive different quotes.
What Electrical Work Can Be Added to the Quote?
A ducted air conditioning system needs an appropriate electrical supply. In some homes, the existing setup is already suitable. In others, additional work is required. A new dedicated electrical circuit can add around $600 on average, depending on the property and the work involved.
Larger systems can have more substantial electrical requirements, so it is important to ask whether electrical work is included, excluded, or subject to further assessment. A lower quote may not actually be cheaper if electrical work is added later.
Why Does a Double-Storey Installation Cost More?
Double-storey homes are often more expensive to retrofit because conditioned air needs to reach both levels. The upper floor may have accessible roof space, but supplying the lower floor can require vertical duct routes, commonly called droppers. This can involve extra ductwork, bulkheads, more complex routing, and additional labour.
Depending on the property, this can add approximately $1,500 to $3,000 compared with a simpler single-storey installation. The exact figure depends on whether suitable routes already exist and how the home has been constructed.
When Does Three-Phase Power Affect the Quote?
Larger ducted systems can have higher electrical requirements. Systems above approximately 18kW will often require three-phase power.
If your home already has a suitable three-phase supply, this may not add much to the project. If it only has single-phase power, an electrical upgrade may be required before the selected system can be installed. That can significantly change the total cost. This is why system sizing and electrical requirements should be considered together during the quoting process.
Why Does Roof Space Change the Price?
Roof access can make a major difference to installation difficulty. A spacious roof cavity gives technicians more room to position equipment and install ductwork efficiently.
Costs can rise in homes with:
- Flat roofs
- Low roof clearance
- Tightly spaced trusses
- Limited access points
- Existing services blocking duct routes
- Minimal space for the indoor unit
In some situations, slimline equipment may be needed. In others, the installation simply takes longer because ductwork is harder to route. More installation time usually means higher labour costs.
How Much Difference Does the Brand Make?
Brand choice can affect the equipment portion of a ducted air conditioning quote considerably.
Some systems sit at a higher price point because of features such as more refined inverter technology, quieter operation, stronger parts availability, or more established after-sales support. Other systems are designed to meet a tighter upfront budget.
At ClimateLink, we recommend looking beyond the purchase price and considering:
- Reliability
- Energy efficiency
- Noise levels
- Parts availability
- Warranty support
- Manufacturer after-sales support
- Long-term servicing requirements
We recommend equipment based on the home, budget, and long-term ownership requirements rather than simply choosing the cheapest unit available.
What Should Be Included in a Ducted Air Conditioning Quote?
A good quote should provide enough detail for you to understand what you are paying for.
Look for:
- Air conditioning brand and model
- System capacity
- Number of zones
- Controller type
- Number of outlets
- Return-air setup
- Ductwork
- Electrical work
- Installation labour
- Additional building work
- Commissioning
- Product warranty
- Workmanship warranty
- Any exclusions
If a quote simply says “ducted air conditioning system — $12,000” without much detail, it can be difficult to compare it properly with another proposal.
What Should a Typical Ducted Air Conditioning Project Cost?
Based on the types of residential projects ClimateLink installs across Southeast Queensland, the following figures provide an indicative guide to complete system costs.
| Home Size & Layout | Typical System Capacity | Indicative Installed Cost |
|---|---|---|
| Small home or apartment, 2–3 bedrooms, single storey | 7.0–10.0 kW | $7,500–$11,500 |
| Medium home, 3–4 bedrooms, single storey | 10.0–14.0 kW | $9,500–$14,800 |
| Large home, 4–5 bedrooms, single storey | 14.0–16.0 kW | $12,500–$18,000 |
| Executive or double-storey home, 5+ bedrooms | 16.0–20.0+ kW | $15,000–$25,000+ |
Prices are indicative only and reflect typical ClimateLink project ranges. Actual costs vary according to system selection, property layout, zoning, electrical requirements, access, and installation complexity. A site assessment is required for an accurate quote.
Get a Ducted Air Conditioning Quote From ClimateLink
If you are comparing ducted air conditioning quotes, look beyond the headline price. The equipment, zoning, controller, ductwork, electrical work, installation complexity, warranties, and ongoing support can all influence the total.
At ClimateLink, our technicians assess the home before recommending a system. We consider the size and layout of the property, roof space, electrical requirements, zoning preferences, and the way you intend to use the air conditioning. That allows us to provide a quote based on the actual job rather than a one-size-fits-all package.
If you are in Logan, South Brisbane, or a surrounding area, contact ClimateLink to arrange an assessment and receive a tailored ducted air conditioning quote.
Frequently Asked Questions
Quotes can vary because installers may specify different brands, capacities, zone numbers, controllers, ductwork, electrical work, and installation scopes. Always compare what is included rather than looking only at the final price.
A standard additional zone can add around $450, depending on the system and installation requirements.
A MyAir smart controller will generally add around $1,200 to $1,800 to the installation.
Specialised installation labour commonly ranges from approximately $2,500 to $5,000+, depending on the complexity of the property and the work required.
Double-storey homes may require additional duct routes, droppers, bulkheads, and labour to deliver air to the lower floor. This can add roughly $1,500 to $3,000 to a standard installation.
The quote should clearly state whether electrical work is included or excluded. A dedicated circuit may add around $600 on average, while more substantial upgrades can cost more.