Split system and ducted air conditioning are the two main options for cooling homes. The cost to install a split system starts from $1,000, while ducted installations range up to $8,000, depending on size and design.
The main difference is that split systems cool single rooms or small areas, while ducted systems distribute air throughout the whole house. Split system air conditioning is usually more affordable upfront, while ducted options often suit larger homes needing consistent whole-house climate control.
This blog compares installation costs for split system air conditioners and ducted systems, running costs, pros and cons, and which air conditioning option is recommended for Melbourne homes.
Difference Between Split System vs Ducted Air Conditioning
The main difference between split system and ducted air conditioning system is that a split system cools or heats a single room with a wall-mounted unit, while a ducted system distributes air from one central unit throughout the entire home.
Split air conditioning systems are simpler to install because they require less wiring and no ductwork. They are well suited for apartments, townhouses, or homes where only a few rooms need cooling.
A ducted air conditioning system uses one central unit that connects to ducts hidden in the ceiling or under the floor. These ducts deliver conditioned air to multiple vents, cooling or heating the entire home at once.
Ducted air conditioners involve higher installation complexity since they require ducting throughout the property. They are best for larger houses where even temperature control across all rooms is the goal.
Cost Comparison: Install and Ongoing Running Costs
Split system air conditioners are cheaper to install than ducted systems as they need a higher upfront investment. The ongoing cost to run an air conditioner also varies depending on the system type and energy use.
| System Type | Installation Cost | Average Running Cost (per hour) |
|---|---|---|
| Split System | $1,000 – $3,500 | $0.25 – $0.45 |
| Ducted System | $6,000 – $8,000 | $1.00 – $2.50 |
Split systems are the most affordable choice for small homes or single rooms where usage is limited. Ducted systems suit larger homes, but higher installation and running costs make them a long-term investment for whole-house comfort.
Pros and Cons Based On Home Size and Layout
Here are the pros and cons of split air conditioning and ducted air conditioning systems:
| System Type | Pros | Cons |
|---|---|---|
| Split System | Low upfront cost, easy installation, ideal for 1–2 bedroom homes | Limited to single rooms, multiple units needed for larger homes |
| Ducted System | Whole-house comfort, hidden ducts, zoning for different areas | High upfront cost, complex installation, higher running expenses |
Long-Term Energy Efficiency Considerations
Split systems deliver higher efficiency in small homes because they only cool specific rooms. This targeted use reduces running costs by 20% to 40% compared to cooling the entire home.
Ducted systems consume more energy overall, but zoning technology improves efficiency by directing airflow only where it is needed. High star-rated ducted units cut electricity use by up to 30% over older models, reducing long-term bills and offsetting higher air condition installation costs.
The key takeaway is that efficiency is maximised when the system type matches the home. Split air conditioning systems work best for smaller spaces, while zoned ducted systems are more efficient for larger properties.
What’s Recommended for Melbourne Homes
Split air conditioning systems are recommended for smaller Melbourne homes, apartments, and townhouses where targeted cooling is enough. They are cost-effective, simple to install, and suit properties with two or three bedrooms.
Ducted AC systems are recommended for larger homes where consistent temperature control across all rooms is required. With zoning features, they provide whole-house comfort and improved efficiency in multi-bedroom properties.
