Custom Multi Head Split System Installation Melbourne

A multi head split system is an excellent climate control solution for Melbourne homeowners who want to cool and heat multiple rooms without cluttering their exterior with several outdoor units.

At Coldflow, our licensed specialists bring decades of experience to every project, ensuring your multi-room setup is energy-efficient and perfectly integrated into your home.

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What is a Multi-Head Split System?

Multi-head split systems allow you to control different room temperatures from one outdoor unit.

Ideal for homes needing flexible, zoned heating and cooling.

A multi head split system is a type of air conditioning system where multiple indoor units are connected to a single outdoor unit. This allows different rooms or areas of a home to be heated or cooled independently while reducing the number of outdoor units required.

Multi head split systems are commonly used in homes and apartments where space is limited, providing individual temperature control in each room from one central outdoor condenser. This optimises comfort levels as each room can be set to your desired temperature. Multi-Head Systems can also mean reducing your electricity bills because you’ll only heat and cool the rooms in use.

The multi-head system you choose will depend on how many rooms require heating and cooling. Up to 6 indoor units can connect to a single outdoor split system unit. At Coldflow we have a huge range of the best brands to choose from.

Because these systems are more complex than a standard single split, they require a higher level of technical skill to install and maintain. By choosing the experts at Coldflow, you are ensuring that your refrigerant lines are perfectly balanced and that your system is sized correctly to handle the load of multiple rooms simultaneously.

Organise a free multi head split system quote now or contact us to find out how we can help you keep your home comfortable.

Multi Head Split System Specifications

Multi Room System

Runs On Electricity

Heating and Cooling

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Frequently Asked Questions About Multi Head Split System Airconditioning

How Do Multi-Head Split Systems Work?

How Do Multi-Head Split Systems Compare?

Traditional Split Systems have a matching outdoor unit for every indoor unit; given that every home has multiple rooms, having an outdoor unit for every indoor unit would take up a lot of space and power consumption – that’s where a Multi-Head system comes in.

With a Multi-Head system, you can have 2 or more indoor units connected to 1 outdoor saving you valuable space, and future servicing costs.

How a multi head system installed vs normal split system diagram — How a Multi-Head Split System works compared to a standard Split System

How Do Multi-Head Split Systems work?

Multi-Head Split Systems use the same technology as normal Split Systems. They work by having half the system (called a condenser) outside the home, and the other half (called the fan coil, or internal unit) inside the home.

When cooling, the warm air from inside the room is taken in by the fan coil and removed, resulting in cool air recirculating back into the house. While reverse cycle allows for the heat pump to run in reverse to provide heating during cold days.

What Are The Running Costs With Multi Head Split Systems?

Running costs vary based on usage and the energy rating of the chosen model. For a high-efficiency system like the Mitsubishi Electric MXZ Series (7.1kW) serving two bedrooms and a lounge, annual running costs are estimated at approximately $702.90. Because you only power the units in the rooms you are currently using, these systems are often more economical than cooling the entire house with a large ducted system.

Multi head split system running costs diagram — How a Multi-Head Split System works compared to a standard Split System

*Data is based on: 2016 Victoria Energy Tariff of 32.1 c/kWh, using a Mitsubishi Electric Multi-Head MXZ-4e71vad/msz-ge25vad collected from Sustainability Victoria’s Energy Consumption and Running Costs website. Usage times were set on average to 4 months of heating, and 2 months of cooling based on 7 hours a day. Actual running costs are affected by many factors including climate and insulation; this data should only be used as a guide and does not guarantee your individual running costs will reflect these results.

Reducing Multi Head Split System Running Costs

It doesn’t take much to reduce your running costs. Depending on the model you purchase, and it’s respective star rating will determine how much you can save annually. However looking beyond the initial cost to how you use your Multi-Head Split System can help as well.

Smarter Choice, Save Energy Water and Money

Tips For Using A Split System

Best Tip! Set the thermostat between 24C and 26C for cooling. Every degree lower in summer will increase the running costs by around 10%.

Use the economy setting if your split system has one and regularly service your air conditioner.
Keep the sun’s heat out by closing curtains and external blinds during the day. Close windows and doors to areas being cooled when the split system is running.
When the split system is switched off and its cooler outside, open doors and windows to let the cool air in.
Insulate your home to keep the heat out in summer and in during winter.
Dress to suit the weather conditions.

Find more at https://www.sustainability.vic.gov.au

Why Choose Multi Head Split System?

Multi-Head Split Systems are an economical solution for cooling lots of different rooms. Multi-head air conditioners are relatively simple to install, and the installation process can be incorporated to your renovation or building project. Building occupants can adjust the heating/cooling in their own room. It is an ideal choice for large homes, office buildings, and multi-residential premises.

Various split system indoor unit types — When using a Multi-Head Split System, you’re not limited to just Wall Mounted indoor units, in fact you can choose from a whole range of different indoor units

Why Choose Coldflow for Multi-Head Split Systems?

Unlike single Split Systems which can be sold and installed by almost any air conditioning company, Multi-Head Split Systems can only be sold and installed by qualified air conditioning companies, it’s not even something that the big retail stores can sell and install. With over 150,000 heating and cooling installations completed, we have conducted thousands of Multi-Head air conditioning installations; combined with our experience, and range you won’t get a better solution anywhere else.

We supply and install a wide range of different multi head air conditioners at competitive prices. We’ll listen to your ideas, needs and budget constraints to help you decide which system would best suit your property. Our professional team can also repair and maintain your existing system at an affordable rate.

Can I add more indoor units to my existing multi head system later?

This depends on the capacity of your outdoor condenser. When installing a multi-head split system, we focus on sizing the system to meet your current needs. While it is sometimes possible to add additional indoor units later, this typically requires selecting a larger outdoor unit upfront. In most cases, customers choose not to oversize the outdoor unit purely for potential future expansion, as this increases the initial installation cost. If your needs change down the track, our technicians can assess your existing system and advise on the most practical upgrade options at that time.

What brands do you recommend for multi-room cooling?

We highly recommend Mitsubishi Electric, Daikin, and Fujitsu for multi head configurations due to their superior inverter technology and reliability. As a Mitsubishi Diamond Dealer, we can provide expert advice on the best MXZ series models to suit your specific floor plan.

Do you offer repairs and maintenance for multi head units?

Yes. Because these systems have more connection points and complex valving than single units, regular maintenance is vital. Coldflow provides comprehensive multi head split system servicing to check for refrigerant leaks, clean all internal filters, and ensure the outdoor compressor is operating at peak efficiency.

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Multi Head Split System Installation Locations

Melbourne residents looking to warm up during the cool winter months know they can rely on Coldflow for reliable heater installation. For over 50 years, Coldflow have provided quality installation and heater repairs across Melbourne's suburbs. Whether you're in Springvale, Richmond or even Mornington, we are able to come to you and are ready to provide unbeatable expertise and experience.

Coldflow are Melbourne's most trusted name when it comes to air conditioning and heater needs!

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What Our Customers Are Saying

Chris Didcock was very friendly and reassured me that the issue would be rectified. However, our heater went back to fault mode after Chris left. As promised, Chris came first thing in the morning and reset the heating unit after being in contact with the manufacturer about the error code.

MICHAEL B.
LYNDHURST
June 2024

Amazing turnaround and communication! We had a sales person booked in 3 days after we made the online enquiry. Quote was provided on the spot. All questions answered promptly. Installation one week later. All completed in one day. Sales and installations staff were all super friendly, approachable and helpful. Could not fault the team or service!

MEGAN T.
LAUNCHING PLACE
June 2025

The engineers were very friendly and professional. They went out of their way to listen to me as a customer. The quality of their work was top-notch: they knew exactly what to do and they expertly installed the air con devices. Would definitely recommend ColdFlow to my friends and family.

GREG C.
MULGRAVE
November 2023

The service was outstanding from when i made the first call to the completion, Arman made the whole journey seamless and effortless, Murray the licensed installer was very helpful, and his service was second to non. on time he worked effortless to meet the weather prediction and completed the job in time.

RAFIK M.
NARRE WARREN
September 2025

Ray did an excellent job. As it turned out, the error that caused the problem was cleared when the power was off after the storm, but he still made sure the system was working properly by doing a really thorough check of everything. Very helpful, professional and clearly very keen to make sure the job was done properly. Great work!

ANDREW R.
MULGRAVE
February 2024

Great friendly service. Chris called beforehand and arrived between times we were given - checked unit was running safely and as well as it could (given age) and ensured it was safe to continue using. He also gave great advice regarding updating the unit. Customer service from booking to followup was fantastic. Well done Coldflow !

CHERYL D.
BENTLEIGH EAST
July 2025

I was especially happy with the happy with the airconditioner installed in my bedroom.I can highly recommend tle 2 young men who installed it. They were very polite, the airconditioner is well fitted, it works well and when cleaned up after their work. The office workers were helpful responding to calls and answering my questions.

ALMA K.
SOUTH MORANG
May 2024

I received a welcome email reminder that a service was due and made a booking date to suit. Your technicians contacted me the day before to confirm a time and they arrived on time as promised. The work was carried out efficiently by two young men, Steven and Hilo, who did so with courtesy and good humour. They are a credit to your business.

AAFKO S.
HEATHMONT
October 2024

Darren Storey - Professional, knowledgeable, easy to deal with. Adam scheduled the installation promptly and then it happened a week earlier - great. Installation crew lead by Jason - fast, efficient, timely - considering the wet weather throughout the morning and hopefully all has been done properly.

MICHAEL A.
DINGLEY VILLAGE
November 2023

Jarred from Sales did an excellent job at explaining the whole process, helping me choose the correct model etc. Scott the installer was excellent, very clean, respectful, punctual and ensured the site was left in a clean state. Inside the house was also left spotless.

ROSS Y.
MOUNT ELIZA
January 2025

I just had my two units installed. Please pass on my thanks to Jared Wates, who provided the quote, and the team that installed the systems today. The installation team worked really hard, double-checked, if not triple-checked, and certainly made sure things were clean when they left. A very professional and courteous team.

STEPHEN R.
ROWVILLE
May 2025

Very professional team, right from the point of sales (great salesman Tom, honest and authentic, and listened to what I needed. Installers where great..,,took their shoes off inside without me asking..impressed. Totally seamless service, would totally recommend for others.

KIM W.
HURSTBRIDGE
November 2025

We would have liked to be given the option whether to have the smelly chemicals sprayed in the split systems, as the smell lasted for over a week and we would have opted not to have that. Otherwise we are very happy with the overall service and communication from the technician.

LAUREN C.
RINGWOOD NORTH
August 2025

We had a great experience. We were called when there was a cancellation and had the heater installed very quickly. Nick who did the installation did a fantastic job, please pass our thanks on to him. Would highly recommend his work to anyone. Kind Regards

IAN G.
ASHWOOD
January 2024

We'd highly recommend the team from Coldflow. Great communication, prompt and efficient installation and also great advice regarding the removal of our old gas wall heater. Not something we had considered but well worth it with the government rebate which we hadn't known about. Absolutely love our new Daikin unit too! Thanks coldflow.??

PETER M.
ASPENDALE GARDENS
August 2025

We've had the team out on a few occasions now and they have been fantastic. Always on time, great communication and clearly experts in this field. I trust their work and advice and will continue to use Coldflow in the future. I'm already referring them to family and friends.

Richard J.
IVANHOE EAST
November 2024

The staff who attended to me was very good, courteous, communicated well and did everything possible to identify the problem and he did identify the problem. He also clearly explained the possible options for resolving the problem. I was very happy with his conduct.

Gladys M.
CAULFIELD NORTH
July 2025

Everyone involved in this was great. Ash and Terry who did the installation did a terrific job with a lot of attention to detail. And we really appreciate the work they put in. The weather was well and truly against them on the second day which made things really hard. But they were great. Thank you.

ANT B.
KILSYTH
November 2025

The team of installers did a fantastic job. We couldn't believe how quick they were in completing the installation of our new air conditioning system. I wouldn't hesitate to recommend Coldflow to friends or family if they require an air conditioner installed.

ANDREW R.
ALTONA
February 2024

Coldflow recently removed our gas ducted heating and it replaced with a reverse cycle air conditioner. The process from quote to installation was simple and quick! Communication in the lead up to and on the day of installation was terrific. They also tidied up after themselves! I wouldn't hesitate to recommend Coldflow to family and friends.

Madeleine L.
KENSINGTON
September 2024

Relatively minor problem. Serge took due diligence and checked whole unit. May need a new stop valve in future. He explained how how well our 19yo unit is functioning and gave us thoughts on future possibilities. Obviously a very experienced technician and a real gentleman.

ROD P.
KILSYTH SOUTH
February 2025

Daniel Hay - Sales consultant was awesome and he recommended the best EvapCooling system for my double storey house. Installers were amazing. Did the best and clean job. Highly recommend ColdFlow for professional service and they are THE BEST in Melbourne. PERIOD.

PARAM C.
HILLSIDE
December 2023

Jared came twice because we had a difficult set-up situation in a rear room with a box gutter. The solution worked out well. David and Daniel were professional and friendly installers who installed without fuss or mess. Sparky (Harold) was also efficient and easy to communicate with. My wife and I are very happy with the installation.

Andrew K.
HUGHESDALE
October 2023

The whole process from selecting the Aircon, advised by Sales Rep Jared to the installation by Bailey and Anton was so efficient and smooth flowing. Installers were exceptionally courteous and helpful and professional. I couldn't be more pleased with the overall experience. Thank you very much!

Ranjit K.
FOREST HILL
June 2023

The two technicians were well mannered, presented well as representative of your company and did a good job explaining what they had done in terms of the service of our gas heater. They were polite, arrived when they said they would which is important given we work form home and have work commitments. Great ambassadors for your company.

MARIANNE S.
BALWYN
April 2025

Prompt and good communication in letting customers know when they are about to arrive. They do and communicate what was done in service. Any questions are answered and I like the professionalism of turning up in a company named work vehicle and uniform. Also the payment method is trusted with a receipt on the email

KATHERINE V.
SCORESBY
November 2024

Jared was most helpful at all stages especially with filling out the form during the cash back submission to Mitsubishi. I was very happy with Scott the electrician who returned the installation areas back to normal condition. Thanks Jared and Scott.

LIZ P.
NOTTING HILL
July 2023

The installers were exceptionally good. Understood the fragility of my ceiling and dealt with my threatening neighbour when they climbed on the roof on my side. The technician also gave me advice on how to keep the filters healthy and what setting to use. Thanks Coldflow.

JULIE D.
HAWTHORN
January 2025

STEVEN crcic IS THE man !!!!! I have never had a better service in my life my girlfriend and I are so stoked he got the fan in the other room working. He was professional caring and overall a champion. Give the brother a few weeks paid time off and a raise and a promotion. 10/10 can't recommend enough

MARCUS K.
COLLINGWOOD
January 2024

Highly recommend Coldflow. From the initial quoting process through to the completed installation, the whole experience was easy and staff were very efficient, polite and courteous. We were continually kept in the loop regarding the installation date and time, turning up exactly as planned. Very professional service.

DIANNE K.
MENZIES CREEK
January 2026

Craig was great, explaining thoroughly & giving advice on appropriate systems to best suit our floor plan. Advised where best the systems should be installed. The young lads installing were absolutely marvelous! Very polite, very tidy & we can't fault their work. Thank you to all involved in making our purchase a hassle free transaction

TRACEY M.
BERWICK
November 2023

Rang for a service on the existing gas ducted heating system to find the system had died. A quote for a new system was provided on the day and installed the next day. The installation team were excellent, providing great advice and support during the installation. Sincere thank you to all.

TINA M.
TEMPLESTOWE
June 2025

Fantastic service both in regards to receiving the quote (the man sent out seemed to be very knowledgeable and helpful in providing advice on what would work) as well as the installers, who were timely, friendly, knowledgeable and professional in their installation of our split systems :) very very happy with the service we received!!

MARC P.
WOLLERT
January 2024

The whole process was smooth from beginning to end. (Brian was Sales Rep). Good communication was provided via phone or txt msgs. The installer (Matt) was punctual, professional, polite, friendly, and a hard worker on a very hot day! A/c unit is effective, quiet and a slimline design. Thank You!

JENNY T.
CLYDE NORTH
February 2025

On time, informative quote from pleasant sales person. Quick, clean install from pleasant on time installer. Installation even brought forward, quote on Wednesday, instal on Friday! So far great service just got to see how unit performs in hot weather.

Elizabeth A.
NARRE WARREN SOUTH
September 2023

Jared, Lucas and Luke were all very professional, friendly and courteous. We were very impressed with the communication and all were on time for scheduled appointments. They were all just really easy to deal with, we'd definitely recommend Coldflow.

KATE H.
CHADSTONE
December 2023

Organised for the team to come out and assess the in laws heating and cooling. There were 6 systems in total. All were checked and reports received. Services conducted on the systems worth keeping and advice given re the others, allowing informed decisions to be made. Highly recommended.

LINA S.
MOOROOLBARK
July 2024

Very glad and relieved I chose Coldflow. Your installer Murray arrived at 7am Monday 21st, was quickly to work with a minimum of fuss. Old Brivis unit and new Braermar unit out and in through the roof. All over by 9am. He showed us how to use the Braemar control unit before leaving. Great job.

PETER H.
MITCHAM
January 2024

The 2 servicemen were absolutely 1st class. Extremely knowledgeable, clean and efficient. Very importantly they were also extremely considerate of my house and how they conducted themselves! Overall a brilliant experience and I will certainly be telling everyone about the flawless service that I received. Many thanks

BRETT G.
BRIGHTON EAST
January 2024

Daniel was great to deal with, thorough, answered all our questions and communicated well the whole way through. The installation team that come out were fantastic. Double checked anything they needed to, polite, personable and respectful of our home and that my partner was working from home while they were here.

Will C.
ROMSEY
February 2025

The whole process was very smooth end to end and we are very happy with the result. Everyone we dealt with was very professional and got back to answer our queries right away. We have already recommended Coldflow to 2 of our friends who are looking to have split systems installed.

KATHY H.
BONBEACH
September 2025

After 4 weeks of research, quotes & cold to replace split system I am very happy with Coldflow from Daniel coming to give quote, efficient installation by pleasant men & communication on phone. Cosy now with my bigger heating system as advised. Thank you. Would recommend you from my experience.

TRISH A.
BALWYN
July 2023

I would like to shout out to you and Jodi and all the team at coldflow for such a professional outfit. Front the start dealing with you and Jodi the process has been seamless. The boys doing the install and sparky are champions. Once again thank you for everything and would highly recommend you guys to anyone. Cheers Happy camper. ????

MICHAEL F.
MENTONE
March 2026

During the quote process, Jared was very informative about the options available, booking staff for install were extremely accomodating for an earlier installation date & install process was fast & efficient. I would highly recommend Coldflow to anyone looking at ducted heating. Thanks Team!!

KATHLEEN K.
FERNTREE GULLY
May 2025

I was very happy with this companies service. I had a lot of appointments and they made a time that suited. They even showed me how to use the ducted heating system to as an air conditioning ducted system as I only have an air con in the lounge room. I was very impressed.

DANIELLE D.
BORONIA
October 2024

This is the second time we have had Coldflow at our house. Each time the quotes were competitive. The installers arrived on time and were super efficient removing an old device and installing the new unit. Thanks to the team especially Nick and the electricians

STEPHEN G.
SURREY HILLS
December 2023

Sorry I had forgotten the survey. All went well. Ray came as he said and went to work straight away. He left the area clean and tidy after explaining what he had done for the service. Will definitely look to Coldflow in two years time for the next service.

LIZ P.
NOTTING HILL
June 2024

Dealing with your firm has been a very pleasing experience. Fabian and Hoy were so pleasant to deal with and carried out a very tidy installation. George and Christian were also very efficient in completing the electrics. We would not hesitate to recommend Coldflow. Thank you for your service.

SANDRA J.
MONT ALBERT NORTH
August 2025

Our tech Ray did an outstanding job fixing our ducted heating system. It is very obvious that his experience makes him a valuable asset to Coldflow! Thanks for explaining every step of the repair so clearly & for your relaxed & friendly manner! Will 100% rebook a service as it is required down the track! Thanks again!

SEAN M.
DINGLEY VILLAGE
November 2024

An excellent experience. The online was simple and efficient. The call out team were on time, clean uniforms, friendly and polite. Their work was excellent. Everything was made clear. I honestly couldn't fault my dealings with your firm, you should be very proud of the work you must have done to achieve this standard.

Richard S.
BRIGHTON EAST
July 2023

More Coldflow Customer Reviews >

Why Choose Coldflow For Heating & Cooling?

50+ Years Family Owned & Operated

Servicing Melbourne-Wide

Over 150,000+ Installations

In-House Engineering Design Team

6 Years Installation Guarantee

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