Key Takeaways
Split system installation is usually cheaper when it is a simple back-to-back installation with normal access.
Ducted air conditioning costs significantly more because it involves roof or ceiling space, ducts, zones, outlets, and larger equipment.
Electrical work, drainage, wall type, distance between indoor and outdoor units, and access can increase the final price.
A clear quote should state whether supply, installation, electrical connection, brackets, pipework, drainage, commissioning, and warranty are included.
Overview
Air conditioning installation costs depend on system type, unit size, brand, installation position, back-to-back distance, wall type, electrical requirements, drainage, access, roof or ceiling work, and whether the quote includes supply, installation, commissioning, and warranty.
1. Typical Air Conditioning Installation Costs
Air conditioning costs vary depending on whether the job is a small split system, larger living-area unit, multi-split setup, or full ducted system.
Small Split System
$1,800 – $2,800
Small bedroom or study unit with straightforward installation and normal access.
Larger Split System
$2,800 – $5,500
Living area unit, higher capacity, longer pipe run, wall bracket, or extra electrical work.
Ducted Air Conditioning
$8,000 – $20,000+
Whole-home ducted system with ducts, zones, outlets, return air grille, roof access, and electrical work.
2. What Affects the Cost?
The biggest cost differences usually come from system capacity, brand, install position, pipe run length, wall type, electrical work, drainage, brackets, and access.
System Size
Higher-capacity units cost more and may require more complex installation or electrical work.
Installation Distance
Back-to-back installation is usually cheaper than long pipe runs between indoor and outdoor units.
Electrical Requirements
Dedicated circuits, switchboard work, isolators, or upgraded wiring can add to the quote.
Access & Mounting
Two-storey installs, wall brackets, roof access, tight spaces, and difficult drainage can increase labour.
3. Cost Breakdown
A typical split system quote includes the unit, installation labour, pipework, electrical connection, drainage, wall bracket if needed, commissioning, and cleanup.
Total
$3,450
Air Conditioner Unit
$1,900
55%
Installation Labour
$850
25%
Electrical Connection
$350
10%
Pipework, Drainage & Brackets
$250
7%
Commissioning & Cleanup
$100
3%
4. Split System vs Ducted Air Conditioning
The right system depends on whether you want to cool one room, several rooms, or the whole property.
A split system is usually the most practical option for bedrooms, studies, living rooms, or targeted cooling. It is generally cheaper and faster to install than ducted air conditioning.
Ducted air conditioning can provide whole-home comfort, but the quote should clearly explain the indoor unit, outdoor unit, duct layout, zoning, outlets, return air grille, controller, electrical work, and ceiling or roof access assumptions.
5. Air Conditioning Quote Checks
Before accepting an air conditioning quote, confirm exactly what is included in the supplied and installed price.
Confirm the brand, model, capacity, warranty, and energy rating of the unit.
Ask whether electrical connection, isolator, circuit, and switchboard work are included.
Check whether pipework length, wall bracket, drainage, and outdoor unit mounting are included.
Confirm whether the quote includes commissioning, cleanup, and disposal of old equipment if relevant.
7. Questions to Ask Before Booking Installation
Use these questions to compare air conditioning quotes properly before paying a deposit.
What air conditioner brand, model, capacity, and energy rating are included in the quoted price?
Does the quote include both supply and installation, or is it installation-only?
Is the installation back-to-back, or does it require longer pipe runs, wall penetration, roof cavity work, drainage, or difficult access?
Are electrical work, isolator switch, safety switch, circuit upgrade, and compliance certificate included?
Does the quote include mounting brackets, pipe covers, condensate drainage, refrigerant pipework, cabling, and all standard materials?
If an old unit is being replaced, does the price include removal, disposal, wall patching, and making good around the old installation area?
What warranty is provided for the unit, installation workmanship, refrigerant leaks, drainage issues, and after-installation support?
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