What Is a Ducted Air Conditioning System and Is It Right for Your Home?
Ducted air conditioning is the gold standard of whole-home climate control — completely hidden, quiet and capable of conditioning an entire home from a single system. But it's also the most expensive option and requires significant installation work. This guide explains how ducted systems work and who they're best suited for.
How Ducted Air Conditioning Works
A ducted system has three main components:
- Outdoor unit — the condenser, located outside the house (usually on the ground or roof)
- Indoor unit — the air handler, located in the ceiling space or under the floor
- Duct network — insulated flexible ducts that run from the indoor unit to outlet grilles in each room
Conditioned air flows from the indoor unit through the ducts and exits through ceiling grilles (or floor/wall grilles) in each room. Return air comes back through return air grilles. Each room can be "zoned" using electronic dampers that open and close in the ductwork.
Zoning: The Most Important Feature
Zoning allows you to only condition the rooms you're using. Without zones, the system conditions all rooms simultaneously (expensive and uncomfortable). With zones, you can:
- Cool only the bedrooms at night
- Heat only the living area in the morning
- Turn off zones for unused rooms
Modern ducted systems support 4–16 zones with temperature control per zone. This is essential for energy efficiency and comfort.
Ducted vs Split System: The Core Trade-off
| Feature | Ducted System | Multiple Split Systems |
|---|---|---|
| Appearance | Invisible (ceiling grilles only) | Visible wall units in each room |
| Cost (supply + install) | $10,000–$25,000+ | $1,000–$2,500 per room |
| Whole-home coverage | Yes (every room) | Yes (but separate units) |
| Noise | Very quiet (no visible unit in room) | Low (but indoor unit present) |
| Zone flexibility | Electronic zones — easy to adjust | Each unit independent |
| Efficiency at partial use | Less efficient (runs large unit for few zones) | Better (only relevant units run) |
| Suitable for apartments | Rarely | Yes |
| Suitable for large homes | Excellent | Good but many outdoor units |
Who Ducted Air Conditioning Is Best For
- Large homes (4+ bedrooms) that want whole-home conditioning without multiple outdoor units
- New builds and renovations where ductwork can be run during construction
- Heritage and prestige properties where visible wall units would be inappropriate
- Buyers who value aesthetics and are willing to pay the premium for a hidden system
Who Should Choose Multiple Split Systems Instead
- Apartments and smaller homes (under 150m²)
- Existing homes where ducting would require major renovation
- Buyers with a tighter budget who want room-by-room cooling
- Homes where only 2–3 rooms need conditioning
Shop Split Systems at Oceania Appliances
Oceania Appliances stocks the full Daikin, Mitsubishi Electric, Samsung, Fujitsu and Panasonic split system range, including multi-split systems for whole-home coverage without ductwork. For ducted systems, we can connect you with trusted installation partners. Contact us at support@oceaniaappliances.com.au or visit our Wetherill Park showroom. Open 7 days 10am–8pm.