Split system installation · Thornlie 6108
Split system installation in Thornlie
Thornlie summers run long and dry, and the suburb's mix of solid older brick homes and newer double-storey builds each ask something different from a split system. We install for both, just down the road in Huntingdale.
- ✓ Free quotes, upfront fixed pricing
- ✓ Dual-licensed: aircon + electrical
- ✓ Workmanship warranty
Split system air conditioning for Thornlie homes
Much of Thornlie is made up of established 1970s and 80s brick-and-tile homes, and these are some of the most rewarding splits to fit. The challenge is rarely the room itself - it's the switchboard. Older boards in this part of the City of Gosnells often have no spare capacity, so a new high-output unit needs its own dedicated circuit. Because Otter Air is dual-licensed for both refrigeration and electrical work, we run that circuit, upgrade the board if needed, and mount the head and outdoor unit in the one visit, rather than coordinating a separate sparky.
The newer infill and double-storey estates spread through Thornlie bring a different brief. Two-storey homes usually want cooling upstairs in the bedrooms as well as the open-plan living below, and a well-planned multi-head system handles that cleanly - one condenser outside, neat pipe runs through the cavity or roof space, and no bulky boxes on every wall. We size each head to the actual room rather than overselling, so you're not paying to run a unit too big for the space.
Thornlie's hot, dry inland summers and cooler winters make a reverse-cycle split the sensible all-year choice here. Whether it's a fresh air conditioning Thornlie install in a renovated home, swapping out a tired old unit that's lost its bite, or a full multi-head fit-out, we position the outdoor unit for airflow and quiet running and tidy every cable and pipe run.
Installation cost
Split system installation prices in Thornlie
Real supply-and-installed ranges for a standard back-to-back install (GST inc.). See the full breakdown in our Perth split system cost guide.
| Unit size | Suits | Supply + installed |
|---|---|---|
| 2kW | Nursery, study, small bedroom | $1,490 – $2,225 |
| 2.5kW | Small bedroom, study | $1,580 – $2,300 |
| 3.5kW | Standard bedroom, small living | $1,770 – $2,565 |
| 4.2–4.6kW | Large bedroom, medium living room | $2,380 – $3,145 |
| 5kW | Master bedroom, open-plan living | $2,125 – $3,260 |
| 6kW | Large living or open-plan area | $2,185 – $3,525 |
| 7kW | Large open-plan living/kitchen | $2,310 – $3,900 |
| 8–8.5kW | Very large open-plan zones | $2,575 – $4,545 |
| 9–9.5kW | The biggest single-zone spaces | $4,315 – $5,140 |
| Multi-head | Several rooms, one outdoor unit | $4,500 – $11,000+ |
We also install around Thornlie
Otter Air installs split systems right across the Perth metro. Nearby areas we service:
Not your suburb? We cover all of greater Perth — see all areas or read about our split system installation service.
Perth homeowners have trusted us for 10+ years. Here's what they say.
Real five-star reviews from Perth homeowners — see why locals choose Otter Air for air conditioning and electrical work.
See all reviews“Excellent Air Conditioning Installation Service! ⭐️⭐️⭐️⭐️⭐️ When looking to install 2 new aircons at my house, I was recommended to use Otter Air & Electrical and I couldn't be happier with the service provided by Matt and his assistant. From the initial enquiry through to the completion of the installation, the entire experience was seamless, professional and efficient. Matt responded promptly to emails, arrived exactly on time as scheduled, highly professional and the whole experience was stress-free. On the quote, he provided a few options with breakdown details of what is included in the price and makes it easier to make the decision. On the day of installation, the process was completed on schedule and I'm very happy with the quality of the work. They took great care to keep the work area clean and tidy throughout the job, and once finished, they thoroughly cleaned up, leaving everything spotless. Thank you very much, Matt and team and I would highly recommend this company to anyone looking for a reliable, professional and efficient aircon company.”
Free split system quote in Thornlie
We'll size the right unit for your room, give you a fixed, upfront price, and handle any electrical work in-house.