Ducted vs Split System Air Conditioning: Which Is Better for Your Home?

Electricity prices are on the rise, summers getting hotter to deal with, and plenty of Australian homeowners are reaching the point where they just can’t put off upgrading their aircon any longer. But once you start shopping around, another problem pops up. Which one is actually going to make sense in the long run?

For a lot of households trying to compare ducted heating and cooling Melbourne options, the decision is no longer just about keeping cool during heatwaves. Upfront costs, energy use, maintenance, and the way people actually live in their homes all carry a lot of weight in the decision too. What seems like the cheap option upfront can end up being a money pit later on. At the same time, the premium option isn’t always going to save you the cash you’re hoping for.

And that’s exactly why the debate over ducted vs split system aircon continues to heat up all over Australia.

Rising Power Bills Are Turning Up the Heat on Aircon Choices

Aircons no longer a luxury item in many Aussie homes. It’s just part of everyday life, especially when the weather gets extreme in places like Victoria, New South Wales and Queensland. According to the Australian Government’s Energy Rating program, heating and cooling can account for up to 40% of a household’s energy use in this country. That makes keeping the temperature just right the single biggest energy expense for most people.

And as electricity prices just keep going up, people are getting a lot more interested in how these aircon systems will stack up over time. Comfort still matters, but now that energy costs are rising so fast, people are taking a closer look at what these systems will cost to run. That’s really starting to influence their property choices. In places like Melbourne where homes often need heating and cooling at the same time, the debate between centralised ducted systems and those split systems that just cool one room at a time is getting a lot more practical.

Lots of people looking into ducted heating and cooling Melbourne solutions are trying to find a balance between staying cool and comfortable and getting their power bills under control. They’re also trying to keep their long-term sustainability goals on track.

Installation Costs Set Up the First Big Divide

The biggest difference usually shows up right from the start.

In Australia, a standard reverse cycle split system designed for one room can cost anywhere from $2,000 to $4,000 installed, depending on the brand and what you need it to do. Ducted systems are a whole different story though. A whole home ducted installation can cost anywhere from $8,000 right up to $20,000 for bigger homes.

There’s a reason for that price gap. Ducted systems need a lot more work to install, including the ductwork in the ceiling, return air grilles, zoning infrastructure and a lot more labour. Split systems on the other hand are pretty simple, just an indoor unit, an outdoor compressor and a bit of refrigerant piping.

Renovation communities all over Australia just describe ducted installation as costing two or three times as much as multi room split system alternatives. But the picture changes pretty quickly when you start talking about building costs.

Split Systems Still Leading the Way When it Comes to Energy Efficiency

Once your new system is all up and running the next thing to think about is electricity consumption. This is where split systems tend to pull ahead in the efficiency stakes.

According to the Australian Government, ducted systems just don’t stack up too well. The issue is that energy seems to escape through the ductwork and you need bigger fans to get the job done, which of course then uses more power. In contrast, reverse cycle split systems, especially the inverter ones, can achieve some pretty impressive efficiency figures, ranging from 300% to 600%. In real terms that means they can produce three to six units of heating or cooling energy for every single unit of electricity they consume.

When you start looking at actual running costs, the difference becomes even more apparent. Various independent studies in Australia suggest split systems are using around 0.5 to 1.5 kilowatts per hour, whereas ducted systems commonly use between 3 and 6 kilowatts per hour. With electricity prices ranging between 25 to 35 cents per kWh it’s not hard to see why many ducted systems can end up costing three to five times as much to run during those peak summer months.