Why Do Ducted Air Conditioning Quotes Vary So Much? - ClimateLink Pty Ltd

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Why are ducted air conditioning quotes so different? 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.

How much does adding another zone cost? A standard additional zone can add around $450, depending on the system and installation requirements. How much does MyAir add to a ducted air conditioning quote?

A MyAir smart controller will generally add around $1,200 to $1,800 to the installation. How much of a ducted air conditioning quote is labour? Specialised installation labour commonly ranges from approximately $2,500 to $5,000+, depending on the complexity of the property and the work required.

Why does ducted air conditioning cost more in a double-storey home? 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.

Should electrical work be included in my quote? 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.