What Smart Zoning Actually Costs on Ducted Air Conditioning in Australia

Ducted reverse-cycle air conditioning is still the default in a lot of Australian new builds and renovations, and "smart zoning" is the upsell that appears on almost every quote. Sometimes it is genuinely the best money in the whole job. Sometimes it is $3,000 of tablet on a wall doing what four manual dampers would have done.

Here is how the costs actually stack up, and how to work out which side of that line you are on.

The practical takeaway

On a new ducted install, published Australian cost guides put zoning at anywhere from about $1,500 to $4,000 extra. The figure depends on the number of zones and whether you want per-room temperature sensors rather than simple on/off dampers. The guides do not agree with each other, so get at least two itemised quotes from licensed installers. Retrofitting zoning into an existing ducted system usually lands higher per zone, because someone has to get into the roof space and cut into ductwork that is already installed.

If your ducted system already has motorised zones and you just want app and voice control, that is a much smaller job. It is often just a manufacturer Wi-Fi module, though the price varies by brand, so ask for a supplied-and-fitted figure. Do not let the two be quoted as the same thing. If you are looking to upgrade an older gas ducted unit instead, read our guide on retrofitting smart thermostats to gas ducted heating.

What "smart zoning" actually means (there are three tiers)

The term gets used loosely, which is exactly why quotes are hard to compare.

Tier 1 — basic zoning. Motorised dampers in the ducts, opened and closed from a wall controller. Zones are on or off. No temperature sensing per room. This is the cheapest genuine zoning.

Tier 2 — temperature-controlled zoning. Each zone gets a temperature sensor, and the damper modulates to hit a set point for that room. This is what systems like Advantage Air MyAir, AirTouch and iZone offer, plus manufacturer systems such as ActronAir's Tru-Zone and Daikin's AirHub with Linear Zone Control (zone set points within ±2°C of the master). Polyaire's ZoneTouch sits a step below: it sets each zone's airflow in 5% increments rather than holding a room temperature. It is the tier most people mean when they say "smart zoning".

Tier 3 — smart control layered on top. App access, schedules, voice assistants, sometimes energy reporting and Home Assistant integration. Increasingly this is included, but on some brands it is still a separate Wi-Fi module or subscription-free cloud add-on. Ask specifically.

The jump in price from Tier 1 to Tier 2 is mostly sensors, a smarter controller board and commissioning time. The jump from Tier 2 to Tier 3 should be small.

The price bands, roughly

The figures below come from published Australian installer cost guides, which do not agree with one another. Treat them as a starting point for your own comparisons, not a fixed price, and get at least two itemised quotes from licensed installers. Ducted pricing varies enormously with roof access, house layout and state.

• Zoning added to a new ducted install: TradieVerify's cost guide puts basic zoning (2–3 zones) at $1,500–$2,500 and 4–8 zones at $2,500–$4,000 on top of the base system.
• Temperature-sensed "smart" zoning: Quotcha's cost guide says smart zoning systems such as MyAir usually add $1,200–$2,500 over basic zoning.
• Extra zones beyond the standard package: the same Quotcha guide puts each additional zone at $200–$500 at install time.
• Retrofit zoning into an existing ducted system: TradieVerify's guide puts it at $2,000–$4,500 depending on the number of zones and the system brand, because it is roof work, new dampers, new cabling and a new controller.
• Wi-Fi/app module for an existing zoned system: pricing varies by brand and by whether your controller already supports it, so ask for a supplied-and-fitted price before agreeing to anything bigger.

Two cost drivers people miss. First, the constant zone. Most ducted systems need a permanently open zone (usually a hallway) or a bypass so the unit is not choked when only one small room is calling for air. That is a design requirement, not an upsell, and it slightly reduces how much you can actually shut off. Second, commissioning. A zoned system that has not had its airflow balanced properly will underperform no matter how good the app is.

Measure before you spend

Before committing thousands to zoning, it is worth putting numbers on the problem. Cheap Wi-Fi temperature sensors in three or four rooms for a fortnight will tell you whether your issue is genuinely zoning, or whether it is a west-facing window, an undersized duct run or roof insulation.

These are excellent value on split systems, and on the minority of ducted units that are still driven by an IR handheld remote. The catch for ducted owners is that many Australian ducted systems are run from a hard-wired wall controller rather than an infrared handheld. Sensibo's own compatibility guide says your air conditioner must have a working infrared remote, so an IR bridge cannot talk to a wired-only controller, and it certainly cannot open and close motorised dampers. Check what your existing controller is before buying anything on this basis.

Budget Tuya-based IR controllers cover the same ground for less money, with a rougher app experience and more variable Home Assistant support. For a bedroom split or a garage unit, they are a sensible low-cost purchase; prices vary between Australian retailers, so compare before you buy. For a ducted system, they are not a substitute for zoning.

A note on wall thermostats generally: Google says its Nest thermostats are designed for 24V systems. Its compatibility guide states that proprietary systems — wiring with non-standard terminal labels such as 1, 2, 3 or A, B, C — are not compatible. If your ducted reverse-cycle system runs from a manufacturer's proprietary wall controller, verify compatibility with your specific indoor unit and controller model before ordering.

How do you handle homes that mix ducted zones and split systems?

Heating and cooling accounts for 20% to 50% of energy consumption in Australian homes. Conditioning only occupied areas substantially improves efficiency, according to Your Home. In mixed setups, shutting unused ducted zones while running an isolated split system reduces unnecessary energy waste.

However, closing multiple ducted dampers requires caution. Ducted controllers need a designated spill zone to relieve static air pressure. This safety measure prevents flexible ductwork from tearing or detaching when air pathways shut down.

Smart platforms can bring both systems together under unified control. For example, the AirTouch 5 platform manages up to 16 units and zones. It integrates wall-mounted split systems alongside central ducted units using the AirTouch Beam Wi-Fi adapter. This connection enables cross-system scheduling and geofencing from a single touch console or application.

Alternatively, standalone split systems can connect to smart ecosystems using aftermarket infrared controllers like the Sensibo Sky. These controllers allow automated routines that coordinate split units directly with ducted zones.

What to ask before you sign the quote

Run these past your installer in writing:

1. Is this on/off zoning or temperature-sensed zoning? The price difference is real and the comfort difference is bigger.
2. Which zone is the constant zone, and can it be changed later?
3. Does the controller include Wi-Fi and app control at no extra cost, and is there any ongoing fee?
4. Is there a documented local API or Home Assistant integration? Several Australian zone controllers have community integrations; some brands are cloud-only. If local control matters to you, ask now, not after handover.
5. How many zones can the system be expanded to? Adding a zone later to a controller that supports eight is easy. Replacing a four-zone board is not.
6. Who does the airflow balancing, and is it in the price?

The regulated bits you cannot DIY

This is not a weekend project. Installing or modifying a ducted air conditioning system involves refrigerant work and 240V fixed wiring. The Australian Refrigeration Council says anyone who handles refrigerant or works on refrigeration and air conditioning equipment must hold a refrigerant handling licence (ARCtick). Electrical licensing is set by each state and territory, so check the rules with your state's electrical safety regulator. Victoria's regulator, for example, tells householders not to do their own electrical work and to engage a registered electrical contractor. Zone damper motors and controller wiring are typically low voltage, but they are still part of a fixed installation and get connected back to a switched supply.

Plug-in sensors, IR bridges and app modules that connect via a standard Type I socket are fair game for anyone. Anything in the roof space that terminates in the switchboard or the indoor unit is not.

So is it worth it?

Temperature-sensed zoning usually pays for itself in comfort long before it pays for itself in kilowatt-hours. That holds if you have a two-storey home, a large single-level house with bedrooms and living zones used at different times, or rooms with very different solar exposure. Running a 14kW unit to cool one bedroom overnight is the expensive scenario zoning is designed to avoid.

If you live in a compact home where the whole floor plan is in use at the same time, basic on/off zoning at the lower price band is often plenty. The money is better spent on ceiling insulation and external shading.