Typical cost in 2025
Most homeowners pay around $1,800 for a mid-range split system, supply and install
What affects the price?
System type
A single split system is the most affordable option ($600–$2,500 installed). Multi-head split systems suit multiple rooms ($3,000–$8,000). Ducted systems cover the whole home but cost $8,000–$20,000+.
Capacity (kW)
A bedroom or small living area needs a 2–3.5kW unit. A large open-plan living area may need 7–9kW. Oversizing wastes money; undersizing means poor performance.
Property size and layout
Larger properties need higher-capacity systems. Multi-storey homes require more complex ducting. Each additional zone in a ducted system adds $500–$1,500.
Installation complexity
Single-storey homes on a slab are cheapest to install. Roof cavities with limited access, double-brick walls, or long refrigerant pipe runs all add to labour costs.
Brand and efficiency rating
Budget brands (Kelvinator, Midea) are $300–$600 for the unit. Mid-range (Mitsubishi Electric, Fujitsu, Daikin) run $700–$1,500. Premium brands with high star ratings cost more upfront but save on running costs.
Typical cost breakdown
Estimates are based on Australian average rates in 2025. Prices in Sydney and Melbourne are typically 10–20% higher than other capital cities.
Frequently asked questions
How long does split system installation take?
A standard single split system takes 2–4 hours to install. Multi-head systems take a full day. Ducted systems typically take 2–4 days depending on property size.
Do I need a licensed electrician for air con installation?
Yes — in all states and territories, air conditioning installation must be performed by a licensed refrigerant handling technician (ARCtick accredited) and a licensed electrician for any electrical work.
Split system vs ducted — which should I choose?
A split system suits individual rooms or open-plan living areas and is far cheaper to install. Ducted is better if you want whole-home cooling and heating, and is more effective in larger homes, but costs 5–10x more.
How much does it cost to run a split system?
A 3.5kW split system running 8 hours a day in summer costs approximately $1–$3 per day depending on your electricity tariff and the unit's efficiency star rating. Inverter models are significantly more efficient.
Is there a government rebate for air conditioning?
Some state government energy efficiency schemes offer rebates on high-star-rated systems. Check your state government energy website for current offers, as these change regularly.