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What is Split System Air Conditioning?

Author Rod Marchant-Smith | Peninsula Air Conditioning

A split system air conditioning unit is very common in Australia, and it’s extremely useful because it can cool the parts of the home that you’re using, while not needing to cool down the entire house. This makes it energy efficient and environmentally friendly–and it saves you money.

A split air conditioning system diagram would show two air conditioning units: one on the inside of the house and one on the outside. The indoor unit is mounted to a wall, usually up toward the ceiling, and it absorbs heat. The outdoor unit, which is mounted to the outside wall, takes that air and cools it down, then blows it back into the house.

Some of the reasons why you would want to use a split system air conditioning unit are:

  • It can be installed in the rooms where it’s needed, but doesn’t need to cool the entire building.
  • You can expand and upgrade your split system air conditioning layout easily, adding individual units to the rooms and spaces where they’re needed. It is a ductless system, and each unit operates independently of the others.
  • Installation costs are low. Though you will most likely need a licensed contractor to install it, it is a much cheaper alternative to central air.
  • It saves you money.
  • There is very little maintenance.


Some of the reasons why you would not want a split system air conditioning unit are:

  • A single unit can only cool so much of your home, meaning you might need one in the living room, another in the bedroom (or multiple in multiple bedrooms), another in the kitchen, and so on. It’s customizable, which is good, but they only have so much power.
  • They are more aesthetically intrusive into a room than a ducted traditional HVAC system.
  • Unlike a traditional HVAC system, they cannot both heat and cool. They can only cool.

How Does a Split System Air Conditioning Unit Work?

With a split system air conditioner, refrigerant gas is pumped through the cooling unit. As this gas goes through the condenser, it cools down and becomes a liquid. The liquid then goes through the evaporator, where it is changed back into a gas. As this happens, the temperatures drop and the air gets cold.

And then the system repeats. The air circulates over and over until it reaches the temperature of the thermostat, and the system will shut down.

How Much is Split System Air Conditioning?

For more information about what you can expect to pay for split system air conditioning systems, please contact us.

What is a Multi Split Air Conditioning System?

A multi split air conditioner works like the split system air conditioner, except that multiple indoor units can be attached to a single outdoor unit. This makes a multi split system useful if you’re trying to install cooling in a large square footage area all at once, rather than doing a single zone at a time. We service for local air conditioning in Sydney across many areas of northern and eastern Sydney, including Bellevue Hill, Belrose, and more!

Explore our Split System Installation Services at Peninsula Air Conditioning! Contact us to speak with a member of our team and learn more today.

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