
Multi-Split System Installation & Repairs
Heat & cool multiple rooms with a ductless Multi-Head Split System Air Conditioner.
Martin Heating & Cooling provide professional installation of Multi Split System in Geelong, Melbourne’s West & North West. For personalised advice, call us on 1300 146 525 or fill out our online enquiry form.
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Why install Multi-Split System Air Conditioning?
Multi-Split FAQs
Multi Head Split System Air Conditioning operates using the same technology as standard Split Systems, but with one key advantage: a single outdoor unit can power multiple indoor units.
Additionally, as well as wall-mounted indoor units, you can opt for concealed units, where the only visible components are sleek, slimline vents for a more streamlined, modern look.
Multi Head Split Systems have one outdoor unit powering multiple indoor units.
The indoor units can be regular looking wall-hung Split System units, or internal units concealed in walls and ceilings, where you only see a vent.
Concealed units look quite stylish, but whether you are able to install them depends on the design of your house.
Each room has its own remote control, allowing you to set it to the temperature you want without it affecting the other rooms.
It is important to note, while you can adjust the temperature is different rooms, ie 21C in one room and 24C in another, they can be used either in heating or cooling mode, not both at the same time, ie you cant be cooling one room while heating another.
The indoor units can be:
- Regular wall mounted split system heads
- Slimline units which are hidden in bulkheads or ceiling
- Ceiling cassettes which disperse the air multiple directions
- Floor console (think space heater but an aircon)
You can also mix and match, you can have different design indoor units in each room.
No, they are ductless.
The indoor units produce air in each room, it doesn’t come from a central unit like in the case of ducted systems.
How many rooms you want air conditioned and the size of them will depend on what size Multi Split system (represented in KW) you need.
For example, if you have 3 small rooms which require a 2.5kw air conditioner, you will need at least a 7.5kw outdoor unit to run them (3x 2.5kw).
Generally Outdoor units come in a range of sizes from 7.5kw – 12kw. How many indoor units can be connected to them varies depending on the brand and model, but its usually 3-5 indoor units.
The most common application for Multi-Split air conditioners are houses where the is no roof space for a ducted system, such as townhouses and apartments. Or ground floors of double story houses where you can’t access the ceiling in between levels to install ducts.


Multi-Split System Features
Beyond being able to economically heat and cool a room or area, there are some additional handy features, such as WIFI control available.
Features vary from brand to model, so let us know if you are interested in particular feature so we can find your perfect system.
The one unit can both heat and cool
Good option if your house design doesn’t allow for a ducted system to be installed.
You can choose an indoor unit to suit your room. For example, you might have a multi-directional ceiling mounted cassette in the loungeroom and wall mounted units in the bedrooms.
Each indoor unit has its own controller which controls the temperature and fan speed for that room.
It can also be programmed to on and off at certain times.
Those will Solar PV systems will benefit from offsetting their air conditioning running costs.
Features vary between brands and models, so let us know what features are important to you…
- WIFI connectivity & smart phone app – warm or cool your house before you get home
- Quite mode
- Turbo function – quick heating/cooling
- Sleep mode – auto adjusts temperature for comfortable sleeping
- 3D airflow – blades move horizontally & vertically
- Dehumidifying mode
- Proximity sensor – save energy while you are out of the room
- Self cleaning mode
- Anti frost mode
- Slimline profile
Multi-Split Installation & Running Costs
The reason why we generally install Multi-Split System air conditioners in dwellings where the is no roof space for a ducted system, is cost.
While single Split Systems are the most cost effective solution for both heating and cooling individual rooms, once you add more indoor units, the cost increases. If you need 4 or more indoor units, we generally recommend installing a Ducted Reverse Cycle System as it’s around the same price, but covers your whole home.
Of course, if you house doesn’t have roof space for a ducted system, such as townhouses, then Multi Split Systems are a good option.
Need a Multi Head Split System installation quote? Give us a call or use our easy online quote request form. All of our quotes are fully-inclusive, covering your chosen system, professional installation, necessary electrical work, and any government rebates you’re eligible for.
Factors which determine the cost to supply and install a Multi Split include:
- How many rooms or areas you want to air condition
- The size of the rooms or areas
- The proximity of the rooms in relation to the outdoor unit
- The type of indoor units you want
- Your house design ie difficult access or double stories can take longer
- The star rating of your split system
- Features you want
- Brand and Model
There are too many variables to be able to give a price indication, but if you contact our team via phone or enquiry form we will be able to help.
Single Split Systems are very economical to run, you can check our Cooling System selection guide for estimated running costs. Just keep in mind, the more indoor units you have, the higher the running costs will be.
The running costs of your Multi-Split System will depend on various factors including:
- How many indoor units you have
- Your electricity tariff
- How often you use it and for how long
- What temperature you set it to
- The star rating of your system
We only recommend and install heating & cooling systems which have a proven track record for quality, value for money and longevity.
Multi-Split System brands we work with include Rinnai, ActronAir, Daikin and Mitsubishi
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Servicing Geelong, Melbourne's West & North West
At Martin Heating & Cooling, we’re proud to service a wide area that spans the Geelong region and half of Melbourne.
Our goal is to deliver the highest quality heating, cooling and hot water solutions to our customers wherever they are located.
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