Split System Air Conditioning in Perth metropolitan
A split system is the most common way Perth homes and small offices get cooled and heated: an indoor wall unit connected by refrigerant pipework to an outdoor condenser. It suits single rooms or open-plan living areas, and it's usually cheaper to buy and run than ducted systems if you only need to cover part of a house. We've got 105 businesses listed in this category across the Perth metro area, from small owner-operator electricians who also do AC work through to larger dedicated air conditioning companies.
What the job actually involves
A proper split system install covers more than screwing a unit to the wall. It means sizing the unit correctly for the room (getting this wrong is the single biggest cause of high power bills and units that short-cycle), running refrigerant line sets through walls or roof space, mounting and levelling the outdoor condenser somewhere with decent airflow and away from noise-sensitive windows, wiring it to an isolator switch, and vacuuming the lines to remove moisture and air before gassing the system. A rushed or under-qualified install shows up later as ice on the indoor coil, water leaks, or a compressor that dies years early.
What to look for in a contractor
Check the installer holds a refrigerant handling licence (legally required in Australia) and an electrical licence or works with a licensed electrician for the wiring. Ask whether the quote includes a proper heat load calculation rather than a guess based on room size alone, what brand and warranty terms apply (parts vs labour warranty length matters more than the brand name), and whether they'll supply a compliance certificate for the refrigerant work. Get at least two quotes for anything beyond a single small unit.
How our scoring works
Our ranking weighs verified reviews, how consistently a business responds to jobs, licensing signals, and length of trading history, not just star ratings alone. See the full ranked guide to Perth air conditioning contractors for the current top performers, and read our methodology for exactly how we score and verify each listing.
Get matched with split system air conditioning
No obligation. Tell us what you need and we'll connect you with suitable contractors in your area.
All split system air conditioning, ranked by score and relevance
We found 105 businesses offering split system air conditioning; 104 met the criteria for the scored directory. The order weighs each business's overall score by how much of its reviewed work is split system air conditioning, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
Enquiries submitted through our contact forms may be passed to partner providers who can do the work, and we may receive a referral fee. Our rankings and scores are based on our published methodology only and are never influenced by referral fees.
Common questions about split system air conditioning
- How much does a split system installation cost in Perth?
- For a standard single-room split system (2.5kW to 7kW), installation typically runs from around $600 to $1,800 on top of the unit price, depending on how far the pipework has to run, whether brickwork needs cutting, and how accessible the roof space is. Larger units for open-plan areas or multi-head systems cost more. Always ask whether the quote is a fixed price or has allowances for extra pipe run, as this is the most common source of blown-out final bills.
- How often does a split system need servicing?
- Filters should be cleaned every 4 to 8 weeks during heavy use, which you can do yourself. A proper professional service, including checking refrigerant pressure, cleaning the indoor coil and outdoor condenser, and checking drainage, is generally recommended once a year, ideally before summer. Skipping servicing is a common reason units lose cooling capacity or fail early.
- What's a fair sign that an installer has done a quality job?
- A clean, level install with no visible refrigerant pipe kinks, a properly insulated line set, a condensate drain that actually falls away from the house, and a compliance certificate for the refrigerant handling. If the unit is noisy, ices up within the first few weeks, or the outdoor unit vibrates against the wall, that points to a poor mounting or gassing job.
- Is it worth buying a cheaper unit and paying more for installation, or vice versa?
- Installation quality matters more than the brand badge on the unit. A well-known brand poorly installed will still leak, ice up, or underperform, while a mid-range unit installed correctly with the right refrigerant charge and heat load sizing will run efficiently for years. Put the money into a licensed installer who does a proper heat load calculation rather than chasing the cheapest unit price.