What Air Conditioning Installation Really Costs in Melbourne (2026)

Have you started looking into air conditioning for your home? You’ve probably noticed something – the numbers are all over the place. One quote will come in thousands of dollars different to another, yet it looks like the same job – an air conditioning installation.

There’s no one single answer to how much air conditioning installation in Melbourne costs. A lot of the differences depend on what you’re installing, where in your home you’re having it installed and the access to your home to complete the job. A single split-system installation in one room is vastly different to a fully ducted air conditioner servicing a double-storey home.

In this guide, we’ll break down what you could expect to pay for split systems, multi-head systems and more, along with factors that could push the final price up or down. You’ll get a realistic starting point to help you before you buy.

Note: these prices are averages gathered from research across many suppliers, and may not be an accurate representation of Templestowe Heating & Cooling prices. Get in touch with the team today for a free quote.

What Affects Air Conditioning Installation Costs

There are many different factors that can influence the overall costs of installing an air conditioning system in your home. The type of system you want, the brand behind the system being installed and job complexity are just some factors that can have a final say in the cost of installation.

A single split system, cooling one room in your home, might only cost $1,200 to $5,000 all up. Meanwhile, a ducted system that cools your entire home through your ceiling could cost you anywhere up to $28,000 depending on the complexity of installation in the roof, and how large your house is.

Job complexity is a factor. If it is a simple outside-wall-to-inside-wall installation, that will cost less than multi-storey positioning or long pipes that need to channel air through your home. If your home is older and needs an electrical upgrade, this too, will increase the end cost for an air conditioning installation.

Finally, brand choice can influence total cost. Authorised, recognised brands such as Mitsubishi or Daikin may be more expensive than lesser-known brands. You’re often paying for reputation and after-sales service backup guarantees.

You can find a direct comparison between ducted reverse cycle air conditioning and split systems by clicking through to the article.

Split System Installation Costs

A split system is one which can run cool air in the summer and warm air in the winter. They are extremely popular for this. You can have just one installed for a small unit, or have a multi-split system for a larger house, which gives great room temperature control.

Typical Cost Range

• > Small Units (2.5 kW – 3.5 kW): $1,900 to $2,900 (supplied and installed for bedrooms or small offices).
• > Large Units (5.0 kW – 7.1 kW): $2,700 to $4,300 (supplied and installed for living areas or open-plan zones).
• > Multi-Split Systems: $4,200 to $15,000+ depending on whether you connect 2 to 5 indoor heads to a single outdoor unit.

What’s Included in Standard Installation

• > Site Assessment & Unit Supply: Sizing the correct capacity (such as Daikin or Mitsubishi Electric models) for your space.
• > Back-to-Back Mounting: Securing the indoor head on an exterior wall with the compressor directly behind it outside.
• > Pipe & Electrical Work: Running up to standard lengths of refrigerant copper piping, drainage hose, and electrical cabling.
• > Testing & Certification: System pressure testing, vacuuming, gas release, operational run-through, and issuing a certificate of electrical/compliance safety.

Best Suited For

• > Individual Rooms: Perfect for target-cooling or heating specific bedrooms, studies, or extensions.
• > Properties Lacking Duct Space: Ideal for older homes or apartments where installing bulky roof ductwork is impossible.
• > Zoned Efficiency: Excellent for occupants who only want to condition active rooms rather than paying to heat or cool an entire house.

Multi-Head Split System Costs

A multi-head system’s costs scale up the more outlets you have in your home, naturally. For 2 rooms you could be looking up to $7,500, for 3 rooms $11,000, while for 5 or more rooms the costs can go beyond $16,000. The more outlets you have, the bigger the compressor unit needs to be.

Cost Scaling by Number of Zones/Rooms

• > 2-Head Systems ($4,500 – $7,500): Best for pairing a main living space with a primary bedroom.
• > 3-Head Systems ($7,000 – $11,000): Balances hardware cost; commonly covers a living area and two bedrooms.
• > 4 to 5-Head Systems ($10,000 – $16,000+): Requires a heavy-capacity outdoor condenser and longer, complex pipe runs through wall/ceiling cavities to individual rooms.

Cost Factors

• > Equipment Capacity: Total kW needed across all indoor heads dictates the size of the single outdoor compressor unit.
• > Installation Complexity: Running separate copper refrigerant lines and drainage from different rooms to one outdoor placement location.
• > Brand Choice: Preferred local suppliers like Templestowe Heating & Cooling specialise in top-tier brands like Mitsubishi Electric and Daikin.

Ducted Air Conditioning Costs

Ducted air conditioning, running through the roof cavity and cooling an entire home, can cost anywhere up to $28,000. This cost is driven largely by labour costs, with installers crawling around inside your roof. Adding extras such as zoning controls can add to your costs as well.

Typical Cost Range

• > Small / Basic setups: $8,000 – $14,000 for standard single-storey homes with fewer zones.
• > Medium to Large homes: $12,000 – $22,000+ for multi-room family layouts.
• > Complex or premium two-storey setups: $18,000 – $30,000+ with advanced controls.

Why Installation is the Biggest Spend

• > Extensive duct network: Running flexible or rigid insulated ducting through confined ceiling or floor spaces requires significant time.
• > Central unit capacity: Sizing and mounting a heavy-duty outdoor compressor and indoor roof-space fan coil unit.
• > Electrical requirements: Upgrading circuits or wiring dedicated isolators for high-current reverse-cycle operation.

Zoning Add-Ons

• > Pricing: Adds $2,500 to $5,000 depending on the number of automated motorised dampers and control sensors.
• > Functionality: Divides the home into independent areas (e.g., day living zones vs. night bedroom zones).
• > Efficiency: Lowers long-term power usage by shutting off airflow to unoccupied rooms.

Bulkhead Air Conditioning Costs

Bulkhead units usually cost in the range of $1,750 to $3,200 per unit for the basic model, with installation costs sending the total bill up due to complex ceiling integrations. These systems cost more than standard wall-hung air conditioners due to the installation requiring duct connections, specialised placement and more.

Typical Cost Range

• > Unit/Hardware Cost: $1,250 – $3,000 depending on capacity (e.g., 2.5kW to 5kW units from brands like Mitsubishi Electric or Daikin)
• > Total Installed Cost: Higher than standard splits due to extensive labour, custom grilles, and ceiling cavity work.

Why Bulkhead Systems Cost More Than Standard Split Systems

• > Concealed Installation: The indoor unit is hidden inside a ceiling cavity or false bulkhead rather than hung directly on an open wall.
• > Structural Modifications: Requires custom cutting, framing, and plastering work to build the architectural drop-down or access hatch.
• > Additional Ductwork & Grilles: Bulkhead systems need custom supply and return air plenums, flexible duct runs, and designer linear or slot grilles to match room interiors.
• > Complex Servicing Access: Maintenance is more difficult because technicians must access internal components through tight ceiling access panels rather than an exposed wall unit.

Hidden or Additional Costs to Budget For

When budgeting for air conditioning installation or replacement through providers like Templestowe Heating & Cooling, you should budget for some hidden extras, just in case. These can include electrical upgrades or removal of old wiring, scaffolding and other construction equipment.

Electrical and Compliance Costs

• > Electrical Upgrades: Standard switchboards may need a dedicated circuit, safety switches (RCDs), or circuit breaker upgrades to handle a modern high-capacity reverse-cycle system.
• > Condemned Wiring: If technicians find old, degraded, or non-compliant wiring during the pre-installation inspection, current safety laws require it to be fully rewired or replaced before the new unit can be connected.

Installation and Site Access Costs

• > Scaffolding and Difficult Access: Second-storey installations, tight side-pathways, or awkward roof placements often require specialised platform equipment, multi-person handling, or temporary scaffolding hire.
• > Disposal and Decommissioning: Removing and safely recycling an old, heavy unit, including recovering and legally disposing of old refrigerant gas, is rarely bundled into a base promotional install price.

Ongoing Costs

• > Running and Maintenance Costs: Regular preventative servicing (cleaning filters, checking coils, and testing electrical performance) typically ranges from $120 to $450 annually, alongside regular quarterly electricity usage spikes.

Cost Comparison Table

System Type	Price Range (Supply & Install)	Best For	Typical Install Time
Split System	$1,200 – $5,500	Single rooms or open-plan areas	1 day
Multi-Split System	$4,500 – $15,000	Multiple rooms using one outdoor unit	1 – 2 days
Ducted Refrigerated	$8,000 – $28,000+	Whole-home climate control	2 – 5 days
Bulkhead	$3,500 – $8,000	Discreet, concealed cooling where a visible unit isn’t wanted	1 – 2 days

How to Get an Accurate Quote

An accurate air conditioning quote requires a professional site inspection to evaluate room size, layout, and electrical needs. Reputable installers like Templestowe Heating & Cooling (TTV) ensure precise sizing, correct placement, and transparent pricing without hidden fees.

Importance of a Site Inspection

• > Room Size & Layout: Checks square metreage, ceiling height, and window orientation to calculate the correct cooling capacity (kW).
• > Electrical Capacity: Assesses existing switchboards and power supply to see if upgrades are needed before installation.
• > Optimal Airflow: Determines the best physical locations for indoor and outdoor units to maximise energy efficiency.

What a Reputable Quote Includes

• > System Supply & Delivery: Exact equipment costs for trusted brands like Mitsubishi Electric or Daikin.
• > Complete Installation: Standard labour by licensed, fully insured technicians with no use of sub-contractors.
• > Site Specifics & Cleanup: Pipe runs, electrical wiring connections, bracket mounting, and removal of packaging or old units.
• > After-Sales Support: Details on manufacturer warranties, compliance certificates, and onsite maintenance services.

Air conditioning costs in Melbourne come down to a handful of key factors:

• > The type of system.
• > The size and layout of your home.
• > How much additional work is needed to get everything installed properly.

A split system might be all you need for a single room, while a larger home or a whole-house solution could point you towards ducted or multi-head options, and a bulkhead unit offers a discreet finish if that’s a priority for you.

The best way to get a number you can actually rely on is a proper on-site quote, since no online guide can account for your home’s specific layout, wiring, or access. That’s where Templestowe Heating & Cooling comes in. We’ve been installing and servicing air conditioning systems across Melbourne for over 50 years, and we’re happy to walk you through your options and give you an honest, itemised quote before any work begins.

If you’re in Bulleen, Doncaster, Box Hill, Donvale, or the surrounding suburbs, get in touch with Templestowe Heating & Cooling today to book your free quote.