Should I choose a split system or ducted air conditioning?

A split system suits cooling or heating one room or a few rooms, and can often be added room by room. A ducted system suits whole-home comfort in a larger house, but needs suitable roof or floor space for ducts. The right choice depends on your home, so get an on-site assessment.

What is the difference?

A split system has an indoor unit, often wall-mounted, connected to an outdoor unit by pipes. A multi-split links several indoor units to one outdoor unit. A ducted system has a central unit that sends air through ducts hidden in the roof space or under the floor to vents in each room. Both types can be reverse-cycle, meaning they cool and heat.

When do split systems make sense?

• You mainly want to cool or heat one or two rooms, such as a bedroom and living area.
• You want to run different rooms at different times and temperatures.
• Your home has no suitable roof space for ducting.
• You want to start with one room and add others later.

When does ducted make sense?

• You want most of the house comfortable at once, with no units on the walls.
• You have a larger, open or multi-bedroom home.
• There is enough roof or underfloor space for ducts and a central unit.
• Quiet operation inside is a priority, since the main unit sits away from living areas.

Installers commonly report that ducted systems cost more to install, and many sources say that running a whole-home system makes more sense in larger homes, while split systems are often more economical for a few rooms. Costs and savings depend heavily on your home and habits, so ask for them in writing from a licensed installer.

What should I consider in Brisbane?

Summers are hot and humid, and winters are mild, so cooling and humidity control usually matter more than heating. Sun exposure, insulation, ceiling height, window size, the layout and whether the roof space can take ducts all affect the choice. A licensed professional should look at the home in person.

What about efficiency?

Australian energy rating labels show star ratings for cooling and heating, and zoned labels let you compare models for your climate zone. The Energy Rating factsheet on reading the zoned label explains how. Choice also notes that split systems are usually the most efficient type, though the best choice still depends on the home.

What about ongoing maintenance?

Both types need regular servicing by a licensed technician. Ducted systems have more parts to maintain, while multiple split units mean several indoor units to look after. Follow the manufacturer’s maintenance guidance for your system.

What will a quote visit cover?

A licensed professional will look at the layout, sun, insulation and access, discuss how you use the home, and recommend a type and size. Ask them to explain why, in plain terms.