Multi-Split Air Conditioning Systems

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Air Conditioning
Installation

Air Conditioning
Replacement

Air Conditioning
Service

Air Conditioning
Repairs

What is a Multi-Split
Air Conditioning System?

A Multi-split system air conditioner is the most energy efficient way to bring the comfort of conditioned air to your family home, office complex or multi-level building.

The Multi-split system, comprising one compressor and condenser coil, housed in a robust cabinet positioned outside, can connect up to five indoor units individually set at different temperatures for varying comfort levels.

The compressor supplies sufficient refrigerant to each coil to achieve a maximum cooling rate at each indoor unit then automatically reduces refrigerant flow as the set temperature in each room is achieved then maintains it at that level.

The “heart” of the Multi-split system is the inverter type compressor. This type of compressor automatically regulates its workload according to the needs of each individual unit and the selected room temperature requiring a lower energy demand and less power consumption once the required temperature is reached and maintained.

Why is Multi-Split Air Conditioning important?

A Multi-split system air conditioner is much quieter and responds automatically to applied heat loads such as increased occupant numbers, influx of outside air through opening doors or changing solar characteristics as the sun changes direction.

More consistent comfort levels for all occupants within a given living space.
Ability to independently vary comfort levels in different zones
The inverter type compressor, the critical component in the system, has a high COP (Co-efficient of Operating Performance) enabling maximum cooling until the set temperature in each room is reached, then automatically maintains that temperature thereby, reducing power demand.

How can we help find the
best Multi-Split Air Conditioning System for you?

The most suitable Multi-split system for your use depends on a number of factors including the building function, internal volume, number of doors and windows and the number of anticipated occupants.

We will visit your home, site or work with your architectural team to determine a system best suited to your individual needs. Whether that is for a family residence, or multi‑function building.

At Alliance Climate Control, we can bring together the best Multi-split products available from a wide range of options, able to satisfy any operating characteristic that might exist.

From timed operating sequences that activate the system before you arrive home or sleep functions to shut the system down after retiring each night. Even Wifi activated applications are available to control your Multi-split system with a Smart phone application whilst you are away from home.

We will also be there with you during the installation and commissioning process to make sure the selected unit will deliver the requirements ensuring you are absolutely satisfied before final acceptance.

We will also be there to support operation of your system to make sure it operates correctly day after day, year after year.

Reasons to Trust ACC With Your Home

Licensed, insured techs for your protection

Inhouse train techns,
we don't use contractor

Upfront & honest
installation quotes

After care, Lifetime workmanship warranty*

We go the extra mile & focus
on the small details

100% Satisfaction, or we'll be back to make it right!

Other Air Conditioning Systems We Specialise In

Split Wall

Ducted

Multi-Split

Bulk Head

Gas Heating

Cassette

Floor Standing

Package

Window Wall Mounted

VRV

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What Our Community
Is Saying About Alliance

4.9

Based on 2626 reviews

My aircon was serviced by ACC and they did a great job. Damon and Brandon went the extra mile and had great customer service. Thanks guys!

Greg & E.

The maintenance booking and reminder process was easy and excellent.
The service technician arrived on time. He was courteous, pleasant, competent, did a thorough job, carried out the work competently, was very organised, worked safely and maintained a clean worksite both inside and outside the property.
A pleasure to have this quality of service!!!

John L.

We had 2 teams at our house.
B.J,Theo and James installed units in 2 bedrooms upstairs and an inverter outside. They did a great job and had it done in one day.
We also had 2 other unots serviced and cleaned by TK and Eric who were thorough and gave us maintenance tips. The quote from Kody was spot-on and heaps betyer than the main competitor.

Jack H.

Two great men, well organised, tidy and job well done

Kieron B.

Original Review:
I had a split air con unit installed in my apartment by Alliance last week. Yunun and his team did a fantastic job from start to finish. They were friendly, professional and ensured that the unit, compressor, cabling and ducting was installed neatly and blended in with the surroundings. They left my apartment in showroom condition after they finished! I couldn't be happier. Highly recommended.

Update – April 2026:
Andre G came out to complete the annual maintenance on my aircon under job #105771, which Alliance installed last year. The unit was particularly dusty inside, and Andre carried out a thorough service and deep clean. He was professional, meticulous, and explained each step clearly in advance. He did a terrific job and left the apartment spotlessly clean. Thanks again to the Alliance team for consistently great service.

Nina F.

The technicians were on time and professional, they did a really good job deep cleaning our AC units which were very dirty and blocked by molds causing water dripping. I am happy that my ACs was fixed and working well now.

Jacinda M.

2026 - Kyle and Nikola came for my yearly service. They were a pleasure to have. Very professional and did such a good job! I wish I could give them 20/10 stars

Great experience! All the staff are extremely professional. It’s obvious the company has invested a lot into tech and their process to give a great customer experience. Special mention to Gabriel, BJ and Zac for their help!

JJ F.

Very good experience with Alliance Climate Control.

Ivan led the team with Mosa, Zac and electrician Mohamed. Two split units installed and condenser placed neatly at the back.

Process was smooth from start to finish. Clear quote, easy scheduling, no surprises. They arrived at 7:15am and finished by 3pm.

Old heritage terrace, not an easy job. They adapted on site and improved a couple of original decisions. Final result is better because of that.

Workmanship is clean. Conduits through the roof cavity are tidy, indoor units fit well above the windows, and the outdoor unit is discreet.

Ivan communicated clearly throughout and set everything up on our phones at the end.

Professional team. Good execution. Would highly recommend.

stefan W.

Alliance is an amazing company. I thought professional service like this had disappeared years ago. Not only that - but all team members really know their stuff. From the initial sales call with James to comms with the office, booking the day doing the install and cleaning up afterwards everything went like a training movie. How do you get everyone on the same page??? All I can say guys is thank you for an outstanding job - I'd hate to be your opposition.

Joey L.

I had the team from Alliance (Aysa, Vi, Nikola, Eric, Harry, Aiden and James) put in aircon at my apartment. The whole process was great from start to finish. They were professional, punctual, tidy and very friendly. Highly recommend!

Lachlan

The team at Alliance is excellent.

Their knowledge and service lead to an install that was a day shorter and significantly cheaper than quoted. This was completely unexpected after another local company couldn't be bothered to tell me my project was beyond their skill level and ghosted me without providing a quote.

Jason was able to avoid cutting into our ceiling which was amazing after preparing ourselves for a significant patch and paint job.

They are professional, fast and everyone I had contact with was eager to help.

If anyone even slightly mentions air con or an aircon issue I'll be recommending Alliance.

David H.

Alliance Climate Control were a pleasure to deal with. Really professional & a smooth experience from start to finish. I was really happy with the installation team - Qais, Louis & Callum did a fantastic, neat job & left the place immaculate. I asked for a minor change to the drain lines and they were very accommodating.

Stephen K.

Excellent professional service.
Turned up on time, knowledgeable technicians.

Lily L.

We recently had a new ducted air conditioning system installed by Alliance Climate Control and couldn’t be happier with the experience. Liam was the first to attend our home when our 20-year-old system failed. He took the time to thoroughly assess the situation, explain our options clearly, and provide a very competitive quote. His friendly and professional approach made the whole process easy and stress-free from the start. On installation day, Vy and his team were great. They were punctual, efficient, and kept us informed throughout the entire process. They took care to keep our home clean and made sure everything was working perfectly before they left. Overall, the service was outstanding from start to finish. We really appreciated the professionalism, clear communication, and attention to detail. Highly recommend Alliance Climate Control to anyone looking for a reliable and high-quality air conditioning installation.

Leo N.

Fantastic team and great work on replacement system install. 👍 Huge thank you to Qais, Louis & Christian.

Guy M.

Great all-round service from Alliance! Communication was timely from Will and Chris in the office, and Liam, BJ, Theo and Nic were great to deal with for the job quote, service, and install. The install required access to my neighbour’s property, he also commented that they were incredibly polite—asking to move pots and putting everything back exactly as it was. Highly recommend!

Lance L.

Good, professional installation, very happy.

Innes P.

As usual, a pleasure to work with the team, installation went well with the team completing the work in the time they said they would, and following up when needed.

All very tidy too, with everything, even the old fans taken away - great work, thanks Charles and team!

Ovi D.

Professional service, arrived on time and good communication throughout the appointment process

David B.

Excellent and efficient service.
Good humoured in spite of having to climb stairs because of broken lift.

Oliver L.

Allianz climate control were great! Super detailed and thorough service of our ducted air conditioning for about 2hrs on site. Cristiam the technician was awesome 🙏

Jason

We recently had our ducted air conditioning system replaced and couldn’t be happier with the experience. Their current google rating really reflects their level of service, From start to finish, the team delivered excellent customer service and made the whole process seamless.

Everyone we dealt with — VJ, Eric, Brody, Mosd, Harry K and Ionnaes — was friendly, knowledgeable, professional and always punctual. They were respectful of our home and took the time to explain everything clearly, which gave us a lot of confidence in their work.

We really appreciated the trusted advice provided throughout — it never felt like a sales push, just honest recommendations tailored to what we needed.

The operations were also very well organised. From the initial booking, through to installation and final payment, everything ran smoothly and on schedule.

Highly recommend this team if you’re looking for a reliable and professional air conditioning company.

M. G S.

The air conditioning service was outstanding. The technician arrived right on time, communicated clearly throughout the visit, and provided helpful information after the job was done. He serviced the equipment thoroughly and professionally. Couldn't be happier with the experience—highly recommended!

Update. March 2026

AGAIN! We had an outstanding experience with Alliance Climate Control, thanks to Gabriel & Nicolas.

They were extremely professional from start to finish; quickly diagnosed and resolved all of our air conditioning issues with confidence and precision. What really stood out was how informative they were, I was clearly explained the problems, the solutions, and how to prevent future issues.

The attention to detail, efficiency, and friendly approach made the entire process seamless. It’s rare to come across someone so knowledgeable and genuinely committed to great service.

A huge thank you to Gabriel and Nicolas; outstanding service.

Gail G.

Service is fabulous. Great customer service. Professional and very competent technician. I would recommend without hesitation.

Martin B.

Charles, James, Aden and JJ arrived on time and completed the installation in an exemplary professional manor. I would recommend the team to anyone. Cheers to you chaps.

Benjamin C.

I contacted Alliance Climate Control, due to leaking water from my air conditioner. I had Gabriel come to evaluate the condition, and he gave me quotes and explained options. He immediately scheduled the job through a phone call with the office. 2 weeks later, I had Emre and Luke come to my apartment to properly do a deep clean on my air conditioning system. They both did a fantastic job within 2 hours. After the AC is properly cleaned. It works perfectly and feels like new again. Really happy with the job they did. I think I'm going to do this every 12 months as they recommended.

Bill S.

The team led by Bokhan did an excellent job on the installation. They worked through the bad weather to get the job done, and were always ready to provide us feedback when needed. The instal team and the electrical team were very professional.
We would highly recommended Alliance Climate Control for their high quality work.

Helen C.

Dylan and Connor were punctual, professional and a pleasure to deal with. Painstaking in their work, they did an excellent job servicing my airconditioning unit.

Alison H.

Great service. Damon & Brendan arrived on time, worked quickly, explained everything, tidied up. Thank you!

Tim A.

Superb service - Ivan and hist team worked assiduously all afternoon to provide everything and more that I asked for - well beyond the call of duty! He and his team were receptive, polite and just got on with it. The best service I have ever had in fact.