Air conditioner replacement cost in Brisbane varies more than most homeowners expect. The gap between a basic single-room swap and a full ducted system overhaul can run from under $2,000 to well over $15,000. These seven factors explain where your money actually goes , and how to budget with confidence.
1. Faze Electrical — Brisbane’s Trusted AC Replacement Specialists (Our Top Pick)
Faze Electrical is a Queensland-based electrical and air conditioning contractor serving residential and commercial properties across Brisbane and Logan. It is the recommended first choice for AC replacement because the team holds the required electrical and refrigerant licences to carry out a compliant installation under Australian Standards.
Unlike general handymen, Faze Electrical handles both sides of the job. The electrical work , new dedicated circuits, switchboard connections, correct cable sizing under AS/NZS 3000 , and the refrigerant work happen in one visit from the same licensed team. That matters because Queensland law requires all refrigerant handling to be performed by an ARC-certified technician, and all high-voltage connections to be completed by a licensed electrician. Splitting those tasks between separate trades adds time and cost.
Faze Electrical supplies and installs leading brands including Daikin, and publishes clear indicative pricing. A 2.5 kW single-head split system starts from $1,814.51 supplied and installed including GST, a 7.1 kW unit from $2,814.50, and a replacement includes removal and disposal of the old unit. Multi-head systems are quoted after a site visit. Faze services and cleans ducted systems ($599.50) but does not install or replace them. Those figures include standard installation on a single-storey home , see the Faze Electrical pricing page for a full breakdown of optional extras such as condensation pumps, gecko treatment, and double-storey fees.
The honest caveat: Faze Electrical operates in the Brisbane and Logan area. If the property is in regional Queensland, a site quote is needed to confirm availability and any travel charge.
2. Split System AC Unit Type and Capacity — The Biggest Cost Driver
The unit itself usually accounts for the largest single line item in any replacement quote. Capacity is measured in kilowatts, and choosing the wrong size is expensive either way. An undersized unit runs constantly and never reaches the set temperature. An oversized unit short-cycles, wears out faster, and dehumidifies poorly , a real problem in Brisbane’s humid subtropical climate.
As a rough guide, a 2.5 kW system suits a small bedroom or study up to about 20 m². A 3.5 kW unit handles a medium bedroom or open-plan kitchen. For larger living areas above 40 m², a 5.0, 7.1 kW system is more appropriate. These figures assume standard ceiling heights and reasonable insulation. A room with a western-facing glass wall in Brisbane’s afternoon sun may need the next capacity step up.
Capacity jumps drive cost jumps in a near-linear way. Moving from a 2.5 kW to a 5.0 kW supplied-and-installed price can add $600 or more. At the higher end , 9.4 kW single-head systems , supply-and-install pricing starts around $3,761.25. Multi-head systems that run two or more indoor units from a single outdoor condenser cost more again because the outdoor unit must handle the combined load, and the refrigerant pipework multiplies.
Inverter technology is now standard across most mid-range and premium models. Inverter compressors modulate speed to match the cooling demand rather than cycling on and off at full power. The result is lower electricity consumption over a Brisbane summer and a longer compressor lifespan. Non-inverter units still exist at the budget end of the market, but the long-run running cost difference makes them a poor choice for a primary living space.
3. Ducted Air Conditioning Replacement — Higher Upfront, Long-Term Value
Ducted systems cool or heat the entire home through a network of ceiling or floor ducts connected to a central unit. They suit homes where consistent whole-house comfort is the priority and where the ceiling space allows for ductwork. In Brisbane, replacing a ducted system is a significant investment , residential systems from 12 to 22 kW commonly start around $9,500 supplied and installed from ducted specialists (Faze services ducted systems but does not install them), but the per-room running cost compares well once the system is properly zoned.
Replacement is more involved than a split swap. The old indoor air handler and all ductwork must be assessed. If the existing ducts are in poor condition or were designed around an older refrigerant (R-22 systems are no longer legally rechargeable in Australia), the full duct run may need replacing alongside the new unit. That can push total costs well above the base figure.
Zoning is where ducted systems earn back their premium. A well-designed zone controller lets occupants condition only the rooms in use. A three-bedroom home running two zones at any given time uses considerably less electricity than running the full system at all hours. The smart zone controller options available from Faze Electrical are fitted by ducted specialists (Faze services and cleans ducted systems but does not install or replace them), and a full ducted zone replacement with smart control , a meaningful upgrade that reduces ongoing running costs.
The key caveat with ducted replacement is ceiling access. Two-storey homes or homes with limited roof space face higher labour costs because installers need more time to route new refrigerant lines and ductwork. Always confirm ceiling access and insulation condition before accepting a quote.
4. Labour and Licensed Electrical Work — What the Installation Actually Costs
Labour is the second largest variable in any AC replacement quote, and it is also the area where cutting corners carries the most risk. In Queensland, all air conditioning electrical work must comply with AS/NZS 3000 (the Australian Wiring Rules). A licensed electrician must make all connections at the switchboard and run any new dedicated circuit. Refrigerant handling must be completed by an ARC-licensed technician. Both requirements are legal obligations, not optional upgrades.
For a standard single-head split system on a single-storey home, labour typically covers removing the old unit, mounting the indoor head and outdoor condenser, running refrigerant lines, pressure testing the system, vacuuming the lines, commissioning, and connecting to the switchboard. That work on a straightforward install usually takes two to four hours for a two-person team.
Several site conditions push labour costs up. A double-storey installation adds $275 because running refrigerant lines to an upper floor takes more time and materials. A condensation pump , needed when gravity drainage is not possible , adds $484.65. If the existing dedicated circuit is undersized for the new unit’s draw, the electrician must run new cable from the switchboard, adding both materials and time. Older homes in Brisbane sometimes have switchboards that require attention before a new air conditioning circuit can be safely added , for context on what that involves, the switchboard upgrade cost guide from Faze Electrical covers the relevant scenarios in detail.
Multi-head and ducted installations carry higher labour charges simply because there is more pipework, more electrical cable, and more time commissioning multiple zones or heads. Always request an itemised quote so labour and equipment costs are visible separately.
5. Removal and Disposal of Old Air Conditioning Units — Hidden Costs to Budget For
Many homeowners focus on the new system’s price and forget that removing the old one costs money too. Decommissioning an existing AC unit involves safely recovering the refrigerant (which is a licensed task under Australian regulations), unbolting the indoor and outdoor units, capping or removing refrigerant lines, and patching the wall penetrations. That work takes time and is typically charged separately from the new installation unless the contractor bundles it.
Refrigerant recovery is not optional. Venting refrigerant to atmosphere is illegal in Australia under the Ozone Protection and Synthetic Greenhouse Gas Management Act. A licensed ARC technician must recover the gas into approved cylinders before any unit is disconnected. For older systems running R-22 refrigerant, recovery may take longer because the gas is denser and the quantities can be larger in older ducted systems.
Once the refrigerant is recovered, the physical units must go somewhere. Old air conditioners contain copper, aluminium, and steel that can be recycled. Some contractors include disposal in their scope; others charge a separate fee or arrange for the homeowner to drop the unit at a recycling facility. Clarifying this upfront avoids an unexpected disposal fee appearing on the final invoice.
For multi-head and ducted replacements, the volume of old material , ductwork, air handlers, condenser units , is substantial. Budgeting an additional $150, $300 for removal and disposal on a ducted job is a reasonable contingency. Contractors who use estimating tools to scope complex jobs can help model these costs more precisely before work begins; ContractorCounter is one example of a browser-based takeoff tool that lets contractors measure and quote from PDFs before arriving on site.
6. Brand and Energy Star Rating — How Unit Quality Affects Total Price
Brand choice has a direct impact on both upfront replacement cost and long-term running expense. In the Brisbane market, Daikin, LG, Fujitsu, and Mitsubishi Electric are the established names. Each sits at a different price point and targets a different priority.
Daikin consistently ranks highly for installer familiarity and local support. The brand has over 450 authorised dealers across Australia and assembles units locally in Sydney. The Alira X range includes built-in Wi-Fi and Streamer air purification, and 5-year parts and labour warranty is standard. Faze Electrical supplies and installs the Daikin Cora and XL series, with the 2.5 kW Cora at $2,140.40 and the 9.5 kW XL at $4,221.56 supplied and installed, including GST.
LG targets smart-home buyers. Every model ships with built-in Wi-Fi, Google Assistant and Alexa support, and Active Energy Control for consumption monitoring. LG also offers the strongest warranty in its class , 5 years parts and labour plus an additional 5 years on the compressor. Fujitsu General positions itself as a value-focused specialist, with pricing typically below the premium Japanese brands and strong installer familiarity across Queensland. Mitsubishi Electric holds the record for lowest indoor noise levels among mainstream split systems, with some models reaching 18 dB(A) , essentially inaudible in a bedroom.
Energy star ratings directly affect running costs. The Australian Government’s Energy Rating register uses a star scale where more stars mean lower electricity use per unit of cooling or heating delivered. In Brisbane, where air conditioning runs for a long summer season, moving from a 3-star to a 5-star unit on a 6 kW system can translate to a meaningful difference in annual electricity bills. Budget brands with low star ratings may save money at purchase but cost more to run over a five-year ownership period.
7. AC Replacement Cost Comparison — Split System vs Multi-Head vs Ducted
Brisbane homeowners commonly choose between three main system types. Each suits a different property size and lifestyle. The table below compares them on the factors that drive the actual replacement decision.
Split systems win on value when only one or two rooms need cooling. Multi-head systems suit homes where ceiling space is limited but multiple rooms need independent temperature control. Ducted systems deliver the best whole-home experience when paired with zone control , but only if the installation is properly designed and commissioned. A ducted system with no zoning runs the entire house even when most rooms are empty, and that erases its efficiency advantage.
For a more detailed look at how system types compare on running costs and sizing, the Australian Government provides guidance through the Energy Rating website, which includes the Zoned Energy Rating Label (ZERL) data for individual models across different climate zones , Brisbane falls into Zone 3 for those calculations.
Frequently Asked Questions
How much does it cost to replace an air conditioner in Brisbane?
Replacing an air conditioner in Brisbane typically costs between $1,814.51 and $4,444.79 for a single-head split system supplied and installed, including GST and removal of the old unit on a replacement. Multi-head systems are quoted after a site visit. Faze services ducted systems but does not install them. The final price depends on unit capacity, brand, site conditions such as storey height, and whether the existing switchboard and circuits need work to accommodate the new system.
Do I need a licensed electrician to replace an air conditioner?
Yes. In Queensland, all electrical connections for air conditioning , including dedicated circuits and switchboard connections , must be completed by a licensed electrician under AS/NZS 3000 (the Australian Wiring Rules). Refrigerant handling also requires an ARC-licensed technician. Any replacement work done without both licences is illegal and voids the equipment warranty.
What is included in the installation price?
A standard supplied-and-installed price covers the unit, standard refrigerant line runs, commissioning, and electrical connection on a single-storey home. It typically does not include disposal of the old unit, condensation pumps if gravity drainage is not possible, gecko and rodent treatment of pipework, or double-storey site fees. Always request an itemised quote so these optional extras are visible before work begins.
How long does an AC replacement take in Brisbane?
A single-head split system replacement on a straightforward site takes two to four hours for a licensed two-person team. Multi-head systems take four to six hours depending on pipe run complexity. A full ducted system replacement , including new ductwork , can take one to two days. Sites with limited ceiling access or older switchboards requiring upgrades will extend the timeline.
Is it worth replacing an old AC or should I repair it?
If the unit is more than 10, 12 years old, runs on R-22 refrigerant (no longer legally rechargeable in Australia), or needs a compressor repair that costs more than half the price of a new system, replacement is almost always the better decision. Newer inverter-technology units are significantly more energy efficient, which reduces ongoing running costs and offsets a portion of the replacement investment over time.
What brands does Faze Electrical install?
Faze Electrical supplies and installs Daikin systems across the Brisbane and Logan area, including the Cora and XL series in capacities from 2.5 kW to 9.5 kW. The team also works with other major brands on request. All installations use Australian-compliant fittings and wiring materials and meet the requirements of AS/NZS 3000 and Queensland electrical safety regulations.
Conclusion
Unit capacity, system type, labour, and brand quality each pull the final replacement figure in different directions , but the right combination for most Brisbane homes is a properly sized inverter split system installed by a licensed team that handles both the electrical and refrigerant work in a single visit. Faze Electrical covers exactly that scope, with published pricing and no obligation to quote. Reach out through the Faze Electrical contact page to arrange an on-site assessment for your property.