What’s the difference between split system and ducted aircon?

And when should you choose one over the other?

Choosing between split system and ducted air conditioning can have a big impact on how you cool and heat your home (not to mention how much you spend upfront, too).

Split systems are a popular choice for heating or cooling specific rooms, while ducted air conditioning can provide a more discreet, whole-home solution through vents installed throughout the property. But neither option is automatically better than the other.

The right choice depends on your property, budget, available space and how you actually plan to use your air conditioning. So, what’s the difference between split system and ducted aircon, and when should you choose one over the other?

Let’s compare how they work and what each option offers so you can make the most sensible choice for you and your cooling needs.

Split system vs ducted air conditioning at a glance

What is split system air conditioning?

A split system air conditioner delivers both heating and cooling to your home using a series of connected pipelines. While split systems are a more modern technology compared to ducted air conditioning, they still share many of the same internal components.

The most visible part of a split system is the indoor unit, typically mounted on a wall and controlled via remote. These systems are available in two main types:

• Single split systems, which consist of one indoor unit connected to an outdoor compressor.
• Multi-split systems, which link multiple indoor units to a single outdoor unit, allowing climate control in several rooms.

What is ducted air conditioning?

In contrast, ducted air conditioning systems, commonly used in Brisbane, feature a single fan coil unit hidden in the ceiling, with multiple outlets distributed throughout the home. Instead of wall-mounted units, airflow is delivered through concealed ductwork and released into rooms via discreet vents installed in the ceiling, walls, or floor.

This makes ducted systems far less visually intrusive than split systems, with the only visible indoor components being the vents.

When is a split system the better choice for you?

There are usually three main reasons why a split system might be better for you than a ducted one:

Your place isn’t too big

Ducted air conditioning is commonly used in large homes throughout Brisbane, thanks to its powerful cooling capabilities and extensive coverage. But the thing is, many of us really don’t need systems of this size. As such, split systems are found primarily in apartments, units, or small homes.

While an overpowered air conditioning system sounds like a good thing, it actually can sometimes be a negative:

• It may wear out faster due to constant stop-start operation
• Its dehumidification processes may not work effectively
• It’s simply a waste of money (why pay for power you won’t even need to use?)

In cases like this, split system installation is probably closer to meeting your needs. We can even scale up your split system, hooking up multiple indoor units to a more powerful outdoor compressor to create a multi-split system (essentially an ersatz ducted cooling system in your home).

You’ve been having installation trouble with other systems

Air conditioning ducts take up space – and unfortunately, not all homes in Brisbane can support them. Some of the most common obstacles include:

• Small ceiling spaces
• Beams and supports getting in the way
• Flat roofs
• Weight issues

Each of these problems can impact your ability to run air conditioning ducts to all the rooms in your house, making ducted air conditioning less feasible. Compared to ducted air conditioning, split system installation isn’t just faster – since no ductwork is involved, it can also fit into more properties than a ducted system can.

Instead of using wide ducts, split systems use narrow tubes. Not only that, but in most cases, the indoor and outdoor units are installed on different sides of the same wall, minimising the amount of wiring and tubing that needs to be installed.

The upshot? Split systems can be installed in a much wider variety of homes than their ducted counterparts.

You’re looking for a lower upfront cost

There’s no way around it – in the vast majority of cases, ducted air conditioning installation is more expensive, plain and simple. And that means, if you’re looking to bring down your upfront installation costs, then choosing a split system over a ducted one is the way to go about it.

Not only are the systems themselves more affordable, but the installation process is also quicker, reducing labour costs and the overall cost of your air conditioning installation project.

When is ducted air conditioning the better choice?

You’re looking for something less noisy

With the main indoor unit typically installed out of sight in the ceiling or roof space, you won’t have an individual unit operating on the wall in each room – which means ducted air conditioning can be a far quieter and more peaceful way to cool or heat your home.

You want something more discreet

One of the biggest advantages of ducted air conditioning? How little of the system you actually see.
Instead of wall-mounted indoor units, conditioned air is distributed through discreet vents in the ceiling or floor. This can give your home a far smoother, cleaner, streamlined visual style.

You want something to accommodate additional rooms

If you’re planning to extend your home or want to air condition additional rooms later, expanding an existing ducted system can sometimes be a lot more cost-effective than installing separate split systems throughout the property.

However, remember that the possibility of this will depend on the capacity of your existing system as well as the exact requirements of the additional space.

You want to control your whole house with a click of a button

If you need convenience, then ducted air conditioning allows you to control multiple rooms from a central system rather than operating several individual air conditioners.

With a zoned ducted system, you can also divide your home into different areas and choose which zones you want to heat or cool. This gives you greater control without necessarily running air conditioning throughout the entire house at once.

Split system vs ducted: key factors to compare

• Property size
  Split systems often make sense for apartments and smaller homes, while ducted air conditioning is generally better suited to larger properties where you want whole-home coverage.
• Number of rooms
  If you only need air conditioning in one or two rooms, individual split systems may be all you need. For multiple bedrooms and living areas, ducted air conditioning can provide a more practical whole-home solution.
• Available roof space
  Ducted systems need sufficient ceiling or roof space for the indoor unit and ductwork. If space is limited, a split system may be easier to accommodate.
• Installation cost
  A split system will generally cost less to install when you’re only conditioning a small number of rooms. Ducted air conditioning has a higher upfront cost (although remember, installing several individual split systems can quickly add up too).
• Energy use
  Split systems let you run air conditioning only in the rooms you’re using. Zoned ducted systems can offer similar flexibility by allowing you to switch different areas of the home on and off as required.
• Appearance
  Split systems require a visible indoor unit on the wall. Ducted systems are largely concealed, with only the vents and controls visible inside your home.
• Control
  Individual split systems provide independent temperature control for each room. Ducted air conditioning offers centralised control, while zoning can give you more control over different areas of the property.

Which system is right for your home?

There’s no single winner when comparing split system vs ducted air conditioning. The better option depends on your home and how you plan to use the system – as well as balancing your budget and property requirements with how you want to use your air conditioning day to day.
At Tri-Tech, we look at the property as a whole before recommending split system or ducted air conditioning. That includes things such as:

• Room size
• Insulation
• Windows
• Property layout
• Cooling requirements

By assessing these details, Tri-Tech can recommend a system that suits the way your home is built and how you actually plan to use it.
That might mean one or two split systems, a multi-split setup or a fully ducted system with zoning. The aim is to avoid oversizing, undersizing or installing a system that does not properly suit the property.

Frequently asked questions about split systems and ducted air con

Is ducted air conditioning better than a split system?

Ducted air conditioning isn’t necessarily better than a split system on its own merits. It depends on your home and how you want to use your air conditioning.

Ducted systems are often better suited to larger homes where you want whole-home heating and cooling, centralised control and a discreet appearance. Split systems can be a better option when you only need to air condition individual rooms, have limited roof space, or might want a lower upfront installation cost.

Is a split system cheaper to run than ducted air conditioning?

A split system can be cheaper to run if you only need to heat or cool one or two rooms at a time.

Ducted air conditioning conditions larger areas, so running the entire system may use more energy. However, a zoned ducted system allows you to switch off areas you aren’t using – which can help reduce unnecessary energy consumption. Running costs will ultimately depend on the system, property and how you use it.

Can a split system cool an entire house?

A single split system generally isn’t designed to cool an entire house, although it might be sufficient for a small or open-plan property. Larger homes will usually require multiple split systems, a multi-split system, or ducted air conditioning to provide effective coverage across different rooms.

Can ducted air conditioning have different temperature zones?

Yes, ducted air conditioning can be divided into zones so you can control different areas of your home separately.
Zoning can allow you to heat or cool the rooms you’re using without conditioning the entire property at once. Depending on the system and controls installed, some setups can also provide more precise temperature control for individual zones.

Does ducted air conditioning add more value to a home?

Ducted air conditioning can make a home more appealing to potential buyers – especially in Brisbane, where effective cooling, obviously, is usually an important consideration.

Its whole-home coverage and discreet appearance can also be attractive compared with having several visible split systems. However, how much value ducted air conditioning adds will depend on the property, system =, and local market, so there’s no single guaranteed increase in resale value.

Can ducted air conditioning be installed in an existing house?

Yes, ducted air conditioning can often be installed in an existing house, provided you have enough suitable space for the indoor unit and ductwork.

Installation can be more complex than it is during a new build, particularly where roof or ceiling space is limited. But don’t worry: Tri-Tech can assess your property to determine whether ducted air conditioning is practical or whether a split or multi-split system would be a better fit.

Get help choosing your air conditioning system

Whether it’s split system installation or consultations for an upgrade to a powerful ducted air conditioning system, our team works hard to ensure that you’re getting the ideal cooling solution for your home – one that:

• Keeps you comfortable
• Is appropriate for your home
• Fits your budget

(Also, if you’ve previously had split system installed in an inadequate place in your home, it might even be possible to move your indoor unit).
You can make your home even comfier than it already is – all you need to do is get in touch with our air conditioning team on (07) 3394 0222, or click here to reach out online.