Choosing the right cooling and heating system for your home can feel confusing. With so many options, it helps to understand the differences before you invest. In Australia, homeowners commonly choose between split systems and ducted systems, each with its own advantages, running costs, and ideal home types.
If you live in Victoria, there’s an added benefit. By choosing energy-efficient systems, you may qualify for programs such as the air conditioner rebate in Victoria, which can reduce your upfront costs. Making the right choice helps you save both energy and money.
Let’s break things down simply.
What are Split Systems?
A split system has two parts: an indoor unit mounted on a wall and an outdoor unit. These systems are popular across Australian homes because they’re affordable, easy to install, and efficient for cooling and heating individual rooms or open-plan areas. They’re best for apartments, small to medium homes, or spaces where you only need to control the temperature in one or two key areas.
Pros of split systems:
- Affordable
- Easy installation
- Very efficient in most climates
- Can add multiple units if needed
Cons of split systems:
- Not ideal for whole-home climate control in large houses
- Multiple units mean managing separate remotes and filters
Efficiency:
Modern split systems are highly efficient. They offer the best balance of cost and energy performance. Most come with inverter technology, which adjusts output to maintain steady temperatures while using less power.
Rebate eligibility:
If you’re in Victoria, there’s good news. The Victorian government’s split system rebate helps households lower the cost of installing approved energy-efficient units. You may also benefit from the broader Victorian Energy Upgrades scheme when replacing older systems.
What is a Ducted System?
A ducted air conditioning system uses one central unit connected to ducts that deliver air to multiple rooms. You can usually control the temperature room by room or zone by zone.
It’s best suited for medium to large homes, homes being built or renovated, or for those who want whole-home climate control.
Pros of ducted systems:
- Clean look with vents instead of wall units
- Whole-home coverage
- Zoning allows better control
Cons of ducted systems:
- Higher upfront cost
- More complex installation
- Duct leaks can waste energy if not maintained
Efficiency:
Ducted systems can be efficient when installed correctly, especially if zoning is used. However, they generally use more energy than split systems because they heat or cool larger spaces. Poor insulation or duct leaks can also increase energy bills.
Rebate eligibility:
Some ducted systems may qualify under energy-efficiency programs, but split systems often receive more focused support because they’re typically more efficient for most homes.
Efficiency Comparison at a Glance
| System | Best use case | Efficiency | Upfront cost | Running cost | Ideal household |
| Split system | Single rooms or open areas | High | Low to medium | Low | Most homes |
| Ducted system | Whole-home climate control | Medium to high (with zoning) | High | Medium to high | Large homes |
Cost vs Savings: What to Consider
When picking a system, the cheapest option upfront isn’t always the cheapest in the long run. A low-cost unit that uses more energy can end up costing more over time.
Consider:
- Size of your home
- How many rooms you use daily
- Local climate
- Insulation quality
- Energy-efficiency rating
In many cases, one or two high-efficiency split systems can cost less and use less energy than a full ducted system.
Rebate Eligibility in Victoria
If your goal is to save power and reduce costs, Victoria offers extra support for choosing efficient systems.
Programs like the Victorian Energy Upgrades help households upgrade to approved energy-efficient split systems that use less power and improve comfort.
To claim the rebate, you generally need to:
- Choose an approved product
- Use an accredited provider or registered installer
- Follow the program rules at the time of installation
These programs change from time to time, so always check the latest eligibility before you buy.
Which Option Should You Choose?
Pick a split system if:
- You want an affordable, efficient option
- You mainly cool or heat specific rooms
- You want access to strong rebate support
Pick a ducted system if:
- You have a large home
- You want seamless whole-home control
- You have the budget for installation and maintenance
Many households find that one or two energy-efficient split systems offer the best balance of cost, comfort, and rebate eligibility.
Final Thoughts
Choosing the right system is about comfort, energy savings, and long-term value. If you’re in Victoria, efficient options can also unlock rebates that lower your upfront costs.
For most homes, modern split systems hit the sweet spot of price, performance, and rebate eligibility through programs like the Victorian government split system rebate.
Taking the time to compare your options can save you hundreds each year and keep your home comfortable no matter the season. Before you buy, always check if you qualify for the air conditioner rebate to make your upgrade even more affordable.
