How much does a ducted air conditioning system cost in Brisbane?

Ducted system cost by home size

A ducted (HVAC) system hides the ductwork in your roof space and feeds cooled air through ceiling vents in every room. In Brisbane, cost scales with the home it has to cover. These are supply-and-install prices, GST inclusive.

A basic ducted system suits a smaller single-storey home of roughly two to three bedrooms with a single zone. A premium zoned system covers a larger four-bedroom-plus home, adds motorised zoning so you can cool only the rooms in use, and uses a bigger, quieter, more efficient compressor — which is why it sits at the top of the range.

What makes up the price

A ducted quote is really five line items bundled together: the indoor fan-coil unit, the outdoor condenser, the ductwork and vents run through your roof space, the zoning controller (if fitted), and the install labour — which is the largest single component because it's a full day or more of work across the roof cavity. Roof access, ceiling height and how many vents you want all move the ductwork and labour portions.

Zoning and running costs

Zoning is the feature that separates a basic system from a premium one. Motorised zones let you cool the living areas by day and bedrooms by night without paying to condition the whole house. It adds to the install, but in Brisbane's long cooling season it usually pays for itself on running costs. Sizing matters too — an undersized ducted unit runs flat-out in summer and costs more to run than a correctly specified one, while an oversized one short-cycles and wastes power. A well-designed zone plan and a correctly matched compressor are what separate a ducted system that's cheap to live with from one that isn't.

Ducted vs multi-head split

If you don't need every room cooled, a multi-head split can deliver most of the benefit for a lot less — see how installs compare in our Brisbane installation cost guide and the split system installation cost guide. Ducted wins on whole-home comfort and a single controller; multi-split wins on upfront price and flexibility.

What size ducted system do I need?

Sizing is done on a heat-load calculation, not floor area alone — it factors ceiling height, insulation, window orientation and Brisbane's humidity. As a rough guide, a basic single-zone system covers a smaller single-storey home while a larger four-bedroom-plus home needs the premium zoned tier. Always have the installer measure and calculate rather than quote off bedroom count; an oversized or undersized unit costs more to run for the life of the system.

How long a ducted install takes

Ducted is the longest install — plan for one to two days on site while the ductwork is run through the roof cavity, vents are cut into ceilings and the system is balanced and commissioned. It's cleaner to fit during a renovation or before you move in, but a retrofit into an existing Brisbane home is routine. Look for a high energy-star rating and an inverter compressor, and treat any quote that skips a proper heat-load calculation with caution.

Related Brisbane guides

• Installation cost by type — split, multi-split and ducted install prices.
• Split system installation cost — the cheaper single-room alternative to ducted.
• Brisbane air conditioning cost guide — the full city cost guide this deep-dive sits under.
• national air conditioning cost guide — national pricing across every city.