Choosing an air conditioner for your home can seem like a lengthy process. There are numerous brands to compare, energy ratings to check, installation costs to consider, and, of course, the big question: ducted or split system?

Both options can keep your home comfortable through scorching Australian summers. The catch is that they work in very different ways.

A split system is usually the simpler and cheaper option. It is great when you only need to cool a bedroom, living room, home office, or a couple of key spaces. Ducted air conditioning, on the other hand, is designed to cool the entire home through a network of hidden ducts.

So, which one comes out on top?

Well, there is no one-size-fits-all answer. Your home, budget, lifestyle and cooling habits all matter. Let’s break it down and find out.

What Is a Split System?

A split system air conditioner has two main components: an indoor unit and an outdoor compressor. It is called a “split” system because the indoor and outdoor components are separate.

The biggest advantage is simplicity. You can install one unit in the room you use most instead of cooling the entire house. If your bedroom becomes unbearably hot at night, for example, you can install a smaller unit there and leave the rest of the house alone.

A typical split system can cost around $1,200 to $3,500 supplied and installed, depending on its capacity, brand, installation requirements and other factors. Approximate costs can look like this:

These are general price ranges rather than fixed prices. Your actual quote can vary depending on the installation and property.

Why Do People Choose Split Systems?

The biggest drawcard is the relatively low upfront cost.

You can start small. Perhaps you only need cooling in the living room and main bedroom. There is no need to spend thousands of dollars cooling rooms that are rarely occupied.

Split systems also tend to be straightforward to install. In many homes, installation can be completed without the extensive roof and ceiling work associated with ducted systems.

Another advantage is flexibility.

You can switch the system on only when you need it. If you’re working from home during the day, cool the office as and when it’s necessary. When you finish work, turn it off and cool the living area instead.

What Is Ducted Air Conditioning?

Ducted air conditioning takes a completely different approach.

Instead of having a separate indoor unit mounted on the wall, a ducted system uses a central indoor unit connected to a network of ducts. These ducts are installed through the roof cavity or another suitable space and deliver conditioned air through ceiling vents.

The result is a much cleaner look. You don’t have a large indoor unit sitting on your wall. You simply see discreet vents and, depending on the system, a controller or thermostat.

More importantly, ducted air conditioning can cool multiple rooms throughout the house from one central system. This makes it particularly appealing for larger family homes.

How Much Does Ducted Air Conditioning Cost?

Ducted systems generally cost considerably more to install than a single split system.

For many Australian homes, a ducted installation may fall somewhere between $8,000 and $18,000, although the final price depends heavily on the property and system requirements.

For example:

Again, these figures are broad estimates.

Why Choose Ducted Air Conditioning?

The obvious benefit is whole-home comfort. Instead of installing separate systems in several rooms, you can control the temperature throughout the property using one central system.

Ducted systems can also look fantastic from a design perspective.

The equipment is largely hidden away. No bulky indoor unit dominates the living room wall. No collection of outdoor compressors turns the side of your house into an air-conditioning graveyard.

And then there is zone control.

This is one of the most useful features of modern ducted systems. You can divide the house into different zones and choose which areas receive conditioned air. For example, you might cool the living room, kitchen and dining area during the evening while leaving unused bedrooms switched off.

That can help reduce unnecessary energy use.

Ducted vs Split System: Which Is Cheaper to Run?

A ducted system isn’t automatically cheaper to run simply because it cools the whole house with one system. In fact, split systems can be more efficient when you only need to cool one or two rooms. Why pay to condition the entire house when you’re sitting in the bedroom with the door closed?

Modern inverter split systems can adjust their output based on demand, which can help reduce energy consumption.

Ducted systems can also be efficient, particularly when they have good zoning and are correctly sized. But long duct runs can result in some energy loss, especially if the ductwork is poorly installed, damaged or inadequately insulated.

As a rough guide, running costs for a four-bedroom home may land around $600–$1,000 per year for several strategically used split systems, while a well-zoned ducted system might cost approximately $800–$1,400 per year.

These numbers can vary wildly, though. Your climate, electricity tariff, insulation, thermostat setting, system efficiency, house design and usage habits all play a role.

In other words, don’t treat running-cost estimates as fixed.

So, Which One Should You Choose?

Here’s the simple version.

Choose a split system if:

• You only need to cool one to three rooms.
• You’re working with a smaller budget.
• You live in an apartment or smaller home.
• You want a straightforward installation.
• You prefer cooling rooms only when they’re occupied.
• You are renting or don’t plan to stay in the property long-term.

Choose ducted air conditioning if:

• You own a larger home.
• You want whole-home comfort.
• You dislike visible wall-mounted units.
• You have several bedrooms and living areas.
• You plan to stay in the property for many years.
• You want zoning and centralised control.
• You are looking for a more seamless, built-in appearance.

The Bottom Line

There isn’t a clear-cut winner in the ducted versus split system debate.

Split systems win on affordability, flexibility and simplicity. Ducted systems, on the other hand, win on whole-home comfort, appearance and convenience.

The trick is to think beyond the sticker price. Consider how many rooms you actually use, how long you plan to stay in the property, and how much cooling you need and how important appearance is to you.

After all, the best air conditioning system isn’t necessarily the fanciest one. It’s the one that fits your home, your lifestyle and your budget without leaving you wishing you’d done your homework first. For further information or insights, you can connect with our experts at Onsite Air.