Ducted vs Split System Air Conditioning

Ducted or split system — it's the first question most people ask, and the answer isn't universal. The right choice depends on your home, your budget, how many rooms you need cooled, and how long you plan to stay.

Both systems work well in Brisbane's climate. Here's the honest comparison, without a sales pitch for the more expensive option.

The Quick Answer

Ducted suits whole-home comfort, larger homes, and situations where you don't want visible wall units in every room. It costs more upfront but delivers consistent comfort across every zone.

Split systems are better suited to apartments, rental properties, or homes where you only need specific rooms cooled. Lower upfront cost, simpler installation, and easy to add one room at a time as budget allows.

What Ducted Air Conditioning Gives You

A ducted system runs from a single outdoor unit through a network of ducts in the ceiling, with vents in each room or zone. From inside the house, you see nothing but the vents — no wall units, no exposed pipework.

The main advantages:

• Whole-home comfort from a single system
• Zoning — only heat or cool the rooms you're actually using
• No wall units in bedrooms or living areas
• Higher resale value — buyers in Queensland expect ducted in mid-range and new homes
• Consistent temperature throughout the house, no hot and cold spots

The trade-offs: higher upfront cost ($10,000–$25,000 installed), and you need ceiling access for the ductwork. Not every home suits it — a site inspection will tell you quickly.

What Split Systems Give You

A split system is a single wall-mounted indoor unit connected to an outdoor compressor. Each unit cools one area independently. You can have multiple split systems in a home — one per bedroom, one in the living area — each with its own remote and temperature control.

The main advantages:

• Lower upfront cost — a single 3.5kW split system installed typically costs $1,200–$2,000
• Add rooms over time as budget allows
• Each unit runs independently — if one fails, the others keep working
• Works in homes without ceiling access: apartments, slab-on-ground, older builds
• Fast installation — usually a few hours per unit

The trade-offs: visible wall units in every room, multiple outdoor compressors if you have many units, and no unified zoning control across the home.

Cost Comparison

	Ducted	Split Systems
Whole-home (4 bed) upfront	$14,000 – $19,000	$7,000 – $12,000 (5 units)
Single room upfront	Not applicable	$1,200 – $2,000
Running cost (whole home)	$3 – $5/hr (zoned)	$0.70 – $1.20/hr per unit
Maintenance	Annual service (one visit)	Annual service per unit

The upfront cost gap is real. But look at the 10-year picture: 5 split systems mean 5 sets of filters, 5 units that can fail, and 5 service calls per year. Ducted is one system, one annual service, one point of failure to manage.

When Ducted Is the Right Call

Ducted makes the most sense when:

• You're building new or doing a major renovation — ductwork planned around the frame before plasterboard goes on is the easiest and most cost-effective approach
• You want whole-home comfort without wall units in every room
• Your home is 3 bedrooms or larger and you're staying long-term
• You want smart zoning — Airtouch 5 lets you control each zone individually from your phone
• Resale value matters — ducted is a genuine selling point in Brisbane's property market

For new builds across Brisbane Northside, Zac plans the duct runs around the frame before the walls close in. It's the right time to do it — retrofitting ducted into an existing home costs more, though it's often still the better long-term investment. See our ducted installation service for what's involved.

When Split Systems Make More Sense

Split systems are the better call when:

• You're in an apartment, unit, or home without usable ceiling space
• You only need one or two rooms cooled
• Budget is the deciding factor and you want to stage the cost over time
• You're renting and a full ducted install isn't on the table
• You need fast turnaround — a split system can be done in a day

Split systems also work well in commercial spaces where you need independent temperature control per room or office. Our split system installation and changeover service covers all major brands across Brisbane Northside.

What Most Brisbane Northside Homes End Up Choosing

Homeowners in Narangba, Caboolture, Morayfield, and Burpengary with a 4-bedroom home on a standard Queensland block lean toward ducted — particularly if they're building new or doing a major renovation. The climate here means you're running the air conditioning from October through April at minimum. Whole-home comfort matters more than it does somewhere with milder summers.

Renters, apartment owners, and people who only need a bedroom or living area cooled go split system. It's the practical choice for that situation — and a quality unit from Daikin, Mitsubishi Electric, or Fujitsu will serve you well for 10 to 15 years with annual servicing.

If you're genuinely unsure, a conversation on-site is the easiest way to decide. Zac can walk through your home, look at what's realistic, and give you a straight recommendation — not a push toward the more expensive option. Call 0432 590 392 or request a quote.

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Frequently Asked Questions

Can I mix ducted and split systems in the same home?

Yes, and it's more common than people think. A ducted system covering main living areas and bedrooms, with a split system added to a garage, granny flat, or room not included in the original design, is a practical solution. The systems run independently.

Is ducted more energy efficient than split systems?

Modern ducted systems with smart zoning are highly efficient when used correctly — only running the zones you're in. An unzoned ducted system running whole-house is less efficient than a targeted split system cooling a single room. The efficiency lives in the design and how you use it, not the technology alone.

How long does each system last?

Well-maintained ducted systems from premium brands last 15 to 20 years. Split systems from the same tier typically last 10 to 15 years. Annual servicing is the biggest factor in lifespan for both — systems that don't get serviced in Queensland's heat and humidity deteriorate faster than they should.

Do I need council approval for ducted air conditioning in Queensland?

Most residential ducted installations in Queensland don't require council approval, but the work must be done by a licensed refrigeration and air conditioning mechanic. All Parker Air installations are fully licensed and compliant.