What Is a Ducted Air Conditioner?
A ducted air conditioner is a whole-home cooling and heating system where a central unit (usually installed in the roof cavity or under the floor) distributes conditioned air throughout the home via a network of ducts and ceiling or floor vents. Unlike a split system, which cools a single room, a ducted system can condition every room in the house from one central installation.
How Does a Ducted Air Conditioner Work?
The system has three main components: an outdoor compressor unit (similar to a split system), an indoor air handling unit installed out of sight in the roof or underfloor space, and a network of insulated ducts that run to vents in each room. A central controller (or zone controller) manages which rooms are cooled or heated.
Zone Control
Most modern ducted systems include zoning, which lets you divide the home into sections (zones) and independently control each. For example, you might cool only the living areas during the day and switch to the bedrooms at night. This saves energy by not conditioning empty rooms.
Advantages of Ducted Air Conditioning
1. Whole-Home Coverage
A single ducted system can condition your entire house. You get consistent temperature throughout all rooms — no hot hallways or unconditioned bedrooms.
2. Invisible Aesthetic
Ducted systems are virtually invisible. You only see small ceiling or floor vents and a wall controller. No bulky indoor units on walls or high-wall cassettes.
3. Quiet Operation
Because the indoor air handling unit is in the roof cavity, ducted systems are very quiet inside the home. Only the outdoor compressor makes noise, which is located outside.
4. Increases Property Value
Ducted air conditioning is considered a premium feature and can add meaningful value to a property at resale.
Disadvantages of Ducted Air Conditioning
1. High Installation Cost
Ducted system installation is significantly more expensive than split systems, often $10,000–$20,000+ for a full home installation. It requires professional installation by a licensed HVAC contractor.
2. Less Energy Efficient for Partial Use
Running a ducted system to cool the whole home uses more electricity than running a split system in a single room. Without zoning, ducted systems can be less efficient for households that spend most of their time in one or two rooms.
3. Requires Roof Space
The indoor unit needs to fit in the roof cavity, which may not be possible in all homes (particularly some newer slabbed-slab construction or units without roof access).
Who Is Ducted Air Conditioning Best For?
- Large homes wanting whole-home climate control
- Homeowners building new or doing major renovations where duct installation is easier
- Those prioritising a clean aesthetic with no visible indoor units
- Premium properties where ducted AC adds value
Ducted vs Split System
For most Sydney apartments and smaller homes, a split system is the most practical and cost-effective choice. For larger houses where you want whole-home comfort and a premium look, ducted is the superior solution — especially with zone control.
Visit Oceania Appliances
We carry split system air conditioners from Daikin, Mitsubishi, LG, Samsung and more. Visit our showroom at 2/14 Centre Place, Wetherill Park — open 7 days, 10am to 8pm. Free delivery across Sydney.