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A split system air conditioner is a two-part refrigerated cooling and heating system consisting of an indoor wall-mounted unit and an outdoor compressor unit, connected by insulated refrigerant pipes and an electrical cable. The indoor unit — typically mounted high on a wall — circulates conditioned air throughout the room, while the outdoor unit houses the compressor and condenser that perform the heat exchange process.
Unlike ducted air conditioning systems, which require extensive ductwork throughout the roof cavity, a split system requires only a small penetration through the wall to connect the two units. This makes split systems significantly faster to install, more affordable, and far more practical for apartments, units, older homes, and individual rooms where ducting is not feasible.
Split system air conditioners are available in both cooling-only and reverse cycle configurations. A reverse cycle split system functions as both an air conditioner in summer and a highly efficient heater in winter — making it one of the most versatile and economical home comfort appliances available in Australia today.
Single rooms, bedrooms, living areas, home offices, small commercial spaces
2.0kW to 9.0kW — suits rooms from 15m² to 80m²
Reverse cycle models heat in winter — up to 5 units of heat per unit of electricity
Typically 3 to 4 hours — minimal disruption to your home
15 to 20 years with regular annual servicing
Understanding how your system works helps you get the most from it — and recognise when something is not right.
The indoor unit draws warm room air over the cold evaporator coil. Heat energy is absorbed by the refrigerant and transferred to the outdoor unit, where it is released outside. Cooled air is blown back into the room by the indoor fan.
The refrigeration cycle runs in reverse. The outdoor unit extracts heat energy from the outside air — even at temperatures as low as minus 15°C — and transfers it inside, delivering extraordinarily efficient heating.
Modern split systems vary the compressor speed continuously to precisely match demand. This eliminates the energy waste of on-off cycling in older fixed-speed systems, delivering consistent temperatures and up to 40% lower electricity bills.
Not all split systems are the same. Understanding the different types helps you choose the right unit for your space, budget, and lifestyle.
The most common type — a horizontal indoor unit mounted near the ceiling. Available from 2.0kW to 9.0kW. Suitable for bedrooms, living rooms, home offices, and small commercial spaces. Easy to install, operate, and maintain.
Most PopularDesigned for rooms with high ceilings where optimal airflow distribution at height is required. Often used in commercial fit-outs, restaurants, and large open spaces where standard height mounting is insufficient.
Commercial FavouriteThe indoor unit sits close to the floor — ideal for rooms with floor-to-ceiling windows, low-pitched ceilings, sunrooms, or converted garages where warm air delivery at floor level is preferred.
Renovation FriendlyThe indoor unit is recessed into the ceiling, distributing air in four directions through a decorative grille. Popular for commercial spaces, open-plan offices, and retail stores where wall space is limited.
Discreet & CleanA compact ducted unit concealed in the ceiling or under-floor cavity, serving multiple rooms through short duct runs. Combines the aesthetic of hidden installation with the simplicity of a split system — ideal for apartments and townhouses.
Hidden InstallationChoosing the correct capacity is critical. An undersized unit will run continuously without reaching temperature, driving up energy costs. An oversized unit will short-cycle — turning on and off repeatedly — causing poor humidity control and accelerated component wear.
| Capacity | Room Size | Best For |
|---|---|---|
| 2.0–2.5kW | Up to 20m² | Small bedroom, study, nursery |
| 3.5kW | Up to 30m² | Standard bedroom, small lounge |
| 5.0kW | Up to 45m² | Medium living area, open plan |
| 7.0kW | Up to 60m² | Large lounge, large bedroom |
| 9.0kW | Up to 80m² | Very large open plan, large studio |
Modern inverter split systems carry cooling and heating star ratings from 3 to 7 stars. A 6-star or 7-star rated system can consume up to 40–50% less electricity than a 3-star unit of the same capacity — a saving that compounds significantly over years of use.
Varies speed continuously for up to 30% lower running costs vs non-inverter models.
The Seasonal Energy Efficiency Ratio measures real-world efficiency across all conditions.
Gradually adjusts temperature overnight to reduce consumption while maintaining comfort.
Limits maximum power consumption for budget-conscious operation during mild weather.
Programs the system to run only when needed — eliminating standby energy waste.
Professional installation is the single most important factor in the long-term performance, efficiency, and reliability of your split system. Our licensed technicians follow strict installation procedures on every job.
We visit your property to assess the room, determine optimal indoor unit position for maximum airflow, and plan the pipe and electrical route.
We calculate the precise cooling and heating capacity required for your specific space — not just room size, but all relevant factors.
We supply the unit at competitive prices across all major brands — chosen to match your space, budget, and energy efficiency goals.
Mounting the indoor and outdoor units, running refrigerant pipes, making all electrical connections, and sealing the wall penetration.
We vacuum the refrigerant lines, test for leaks, and charge the system to the manufacturer's exact refrigerant specification.
We test across all modes and fan speeds, verify correct superheat and subcooling, confirm drainage, and check all safety controls.
We walk you through operation, explain remote control functions, advise on filter cleaning, and answer every question before we leave.
Every installation is backed by our workmanship guarantee plus the manufacturer's product warranty — complete peace of mind.
We supply, install, service, and repair split systems from every leading brand in the Australian market — from premium Japanese models to affordable and reliable value brands.
Annual split system servicing is the most effective way to maintain peak performance, extend the lifespan of your system, and prevent costly breakdowns. We recommend professional servicing at least once a year — ideally in spring before the summer cooling season.
A clean, well-maintained split system can reduce energy consumption by up to 15% compared to a neglected unit.
Regular servicing extends system lifespan from as few as 8 years to 15–20 years — a huge long-term saving.
Most manufacturer warranties require evidence of annual servicing to remain valid. Protect your investment.
Annual & bi-annual maintenance plans available for residential and commercial customers — with priority scheduling and discounted repair rates.
Even the most reliable systems develop faults over time. Our experienced repair technicians diagnose and fix problems fast — often on the same day you call — across all brands and models.
Catching problems early prevents small issues becoming expensive repairs. Here are the key warning signs to watch for.
A dirty evaporator or condenser coil forces the compressor to work harder, increasing energy consumption without improving comfort.
Reduced capacity is often the first sign of a refrigerant leak, a dirty coil, or a failing compressor — all of which worsen over time if left unattended.
Mould and bacteria growing on the evaporator coil or in the drain tray are the most common cause of odour. A professional clean resolves this immediately.
A blocked condensate drain line or a frozen evaporator coil causes water to overflow from the drain tray and drip from the unit.
Even if everything seems normal, annual servicing ensures your system is clean, correctly charged, and operating at maximum efficiency.
All technicians hold current ARCTICK licences for refrigerant handling, licensed electrical worker certificates, and manufacturer training certifications.
We install, service, and repair every brand and model available in Australia — from the latest inverter systems to older fixed-speed units still in service.
Same-day split system repair in most areas. Call before midday and in most cases we can have a technician with you the same afternoon.
A clear, itemised quote before any work begins. No hidden call-out fees. No surprise charges. What we quote is what you pay.
Every installation and repair is backed by our guarantee. If our work is at fault, we come back and fix it at no additional charge — no arguments, no excuses.
Our emergency repair line is open 24 hours a day, seven days a week, including public holidays. We are always there when you need us most.
Everything you need to know about split system air conditioner installation, service, repair, and running costs.
A well-maintained split system typically lasts 15 to 20 years. Systems that are never serviced or poorly installed may fail in as few as 8 to 10 years. Annual professional servicing is the best investment you can make to maximise system lifespan.
The return air filter should be cleaned every two to four weeks during periods of heavy use. A clogged filter restricts airflow, reduces efficiency, and can cause the evaporator coil to freeze. Filter cleaning is a simple DIY task — your user manual will show you how.
No. Split system installation requires a licensed refrigerant handling technician (ARCTICK licence) to handle the refrigerant, plus a licensed electrician for electrical connections. DIY installation is illegal in Australia and will void the manufacturer's warranty.
As a general guide, a 3.5kW inverter split system running 8 hours per day costs approximately $1.00 to $2.50 per day depending on your electricity rate and star rating. A 5-star or higher rated system will sit at the lower end of this range.
A split system conditions a single room and requires no ductwork. A ducted system conditions multiple rooms through ceiling ducts from a central unit. Ducted systems are more expensive to install but provide whole-home comfort. Split systems are more cost-effective for single rooms or small homes.
Yes — provided it is a reverse cycle split system, which is the vast majority of models sold in Australia today. Reverse cycle split systems are among the most efficient heating appliances available, often delivering 3 to 5 units of heat for every 1 unit of electricity consumed.
Free quotes. Same-day service. All brands. Licensed technicians. 24/7 emergency repairs. We are ready to help you stay comfortable year-round.