Picture two quotes on the kitchen bench for what looks like the same job. One 7kW split for the lounge room, same brand, same model. One price is well above the other, and the natural reaction is to assume someone is trying it on. Usually nobody is. One installer has priced a back-to-back install on the lounge wall. The other has walked around the house, seen that the outdoor unit can’t go there, and priced a long pipe run down the side to the back fence.
That is the honest answer to most questions about split system installation cost in Geelong. The unit is only part of the bill. Where it goes, how far the pipes travel and what your switchboard can handle decide the rest. This guide walks through what actually moves the price, so you can read a quote properly and compare two of them fairly.
The unit price is the easy bit
Most people start by looking up the price of the air conditioner itself. Fair enough, but it tends to set the wrong expectation. A split system has two halves: the indoor head on the wall and the outdoor unit (the compressor box) outside. They are joined by copper refrigerant pipes, a drain line for condensation and electrical cabling. The installation is everything that connects those halves and makes them safe and legal to run.
So the price you see online for a 2.5kW or 7kW unit is the hardware. What you pay to have it running in your home depends on four things we look at on every job:
- how far apart the indoor and outdoor units sit
- what’s in the wall, roof space or subfloor between them
- whether your switchboard and wiring can take another circuit
- how easy the outdoor unit’s spot is to reach
Size matters too. A bigger unit costs more to buy. But a correctly sized unit is cheaper over its life than one that’s too small and runs flat out every hot afternoon, so that’s not where we’d try to save.
Back-to-back is the cheapest install, and here’s why
A back-to-back install means the indoor unit goes on an external wall and the outdoor unit sits directly behind it on the other side. The pipes pass straight through one hole in the wall. Short pipe run, short drain, short cable, and usually a few hours of work rather than a full day.
This is the job most fixed price ads are built around. It’s the closest thing our trade has to a standard install.
The catch is that it only works when the room you want to cool has an external wall, and the space outside that wall suits an outdoor unit. Plenty of Geelong homes don’t line up that neatly. Common reasons we can’t go back-to-back:
- the wall backs onto a side path too narrow for the unit and its airflow
- it would sit right under a bedroom window, next door’s included
- a deck, driveway or garden bed is in the way
- the best wall for the indoor head is an internal one
None of those are deal breakers. They just mean more pipe, more labour and a higher price.
Five things that push a quote up
Longer pipe runs
Once the outdoor unit moves away from the indoor head, the copper pipe has to travel through the roof space, under the floor or along the outside wall in a cover. Every metre adds material and time. Roof space work is slower than going straight through a wall, especially in summer, when it gets hot enough up there to limit how long anyone can safely stay.
Upstairs rooms
A split in an upstairs bedroom often means the outdoor unit sits on the ground with a pipe run down the outside of the house, or on a bracket fixed to the wall. Either way there’s more to do. Working at height brings its own safety requirements, and that time shows up in the quote.
What the wall is made of
Core drilling through double brick takes longer than going through weatherboard. Older homes in suburbs like Geelong West and Newtown can have lath and plaster or old wiring right where the head should go. A brick veneer with a timber frame behind it, common on newer estates, is usually straightforward. We don’t know which one you have until we look.
Your switchboard
This is the one that surprises people. A split system needs its own circuit, and an older switchboard may not have room for one, or may lack the safety switches current standards require. If the board needs upgrading, that’s a separate cost, and it can be a big part of the final number. It’s why our enquiry form asks whether your switchboard has been upgraded.
Because we hold the refrigeration, electrical and cabling accreditations ourselves, the electrical side stays with the same team doing the install. You aren’t left booking a separate electrician and coordinating two trades around each other.
Taking out the old unit
Replacing an old split means recovering the refrigerant before the old system comes off the wall. Sometimes the existing pipes can be reused. Often they can’t, particularly if the new unit uses a different refrigerant or the old pipe is the wrong size. Ask any installer whether removal and disposal are included.
One room, two rooms, or more
If you want to cool two or three rooms, you have a choice. You can install separate splits, each with its own outdoor unit, or a multi-head system where several indoor heads run off one outdoor unit. Multi-head setups save space outside and can suit townhouses or narrow blocks, but the pipe runs are longer and the outdoor unit is larger, so the install is more involved. Two separate back-to-back splits can sometimes come out cheaper. It depends on the layout.
Once you’re past three or four rooms, it’s worth pricing ducted for comparison. Our guide to planning where your splits go covers room sizing and placement in more detail if you’re still working out how many units you need.
Why we measure before we quote
A straightforward single split, say a back-to-back install on a single storey home with a modern switchboard, is simple to price. Beyond that, we prefer to measure before quoting. It isn’t a sales tactic. The big price gaps between quotes come from site details nobody can see over the phone.
Site visits throughout Geelong, the Bellarine Peninsula and the Surf Coast are free and carry no obligation. To get the most out of one, have these ready:
- the approximate age of the property
- your current system type and age
- which way the main living area faces
- whether the switchboard has been upgraded
Orientation matters more than people expect. A west facing lounge in Highton cops the full force of a February afternoon, and that changes the size of unit we’d recommend, which changes the price.
How to compare two quotes fairly
When two quotes for the same unit are far apart, the difference is almost always in what’s included. Check each one for:
- the exact model number, not just the brand and kW
- where the outdoor unit goes and how long the pipe run is
- any new circuit or switchboard work
- removal and disposal of the old unit
- pipe covers, wall brackets or a ground pad
- who does the electrical work, and whether they’re licensed for it
A low quote that assumes a back-to-back install on a house that can’t have one will grow on the day. A quote from someone who has actually stood in your backyard is the one worth comparing against.
Rebates can take some of the sting out
If you’re replacing an old heater or an inefficient system with an efficient reverse cycle split, you may be eligible for support under the Victorian Energy Upgrades program. Eligibility depends on what you’re replacing and the product going in, so check before you sign anything. Our page on Victorian Energy Upgrades rebates explains how it works.
The quickest way to a real number
The only way to know what a split will cost in your home is to have someone look at it. We’ll tell you straight whether your room suits a back-to-back install before you commit to anything. Read how we handle split system installation in Geelong, then book a free site visit.
Common questions about split system installation costs
How much does it cost to get a split system installed?
It depends on the size of the unit and how complicated the install is. A back-to-back install on a single storey home with a modern switchboard sits at the lower end. Long pipe runs, upstairs rooms and switchboard upgrades all add to it, which is why we prefer to measure before quoting anything beyond a simple single split.
Why is aircon installation so expensive?
Because it’s several trades in one job. The refrigerant pipework needs a licensed refrigeration technician, the new circuit needs a licensed electrician, and there’s drilling, fixing and sometimes roof space work on top. The installer is also responsible for the system being safe and correctly charged, which takes proper equipment and time.
Is a back-to-back split system cheaper to install?
Yes. With the indoor and outdoor units on opposite sides of the same wall, the pipe, drain and cable runs are as short as they get, and the job is usually done in a few hours. It only works when the room has an external wall with suitable space behind it for the outdoor unit.
Is a multi-head system cheaper than separate split systems?
Not always. One outdoor unit serving several rooms saves space, but the pipe runs are longer and the install is more involved. Two separate back-to-back splits can come out cheaper, so get both options priced for your layout.
What is the 3 minute rule for aircon?
It’s the habit of waiting around three minutes before turning an air conditioner back on after switching it off. That gives the refrigerant pressure time to settle so the compressor doesn’t restart under strain. Most modern inverter splits have a built-in delay that handles this for you.
What is the $5000 AC rule?
It’s an American rule of thumb for deciding whether to repair or replace: multiply the system’s age by the repair cost, and if the answer is over 5,000, replace it. The figure doesn’t translate neatly to Australia, but the idea holds. If an old unit needs an expensive repair, get a replacement price before you spend the money.