ARTICLE
Best features to look for in a reverse cycle air conditioner
Published Feb 3, 2026 • Updated Sep 9, 2026 - 5 min read
A reverse cycle air conditioner cools in summer and heats in winter from one system, using a heat pump that runs in both directions. The features that matter most are inverter technology, the right capacity for your room size, and a strong Zoned Energy Rating Label score for your climate zone.
Key takeaways from this article
Allow 0.125 kW to 0.15 kW per square metre, so a 20 sqm bedroom needs about 2.5 kW.
Read the Zoned Energy Rating Label stars for your climate zone and main mode of use.
Inverter compressors vary speed to hold temperature, cutting noise and energy use.
Choose a split system for one room, or a portable if you rent and cannot install.
Split and window wall installs need a licensed electrician and refrigerant technician.
Looking for one system that keeps the house cool in February and warm in July? A reverse cycle air conditioner does both, and the features that matter most are inverter technology, a strong Zoned Energy Rating Label score for your climate, the right capacity for the room, and the controls and filtration that suit how you actually live.
Choosing well is less about chasing the biggest number on the box and more about matching a system to your home. Here’s what each feature actually does, and how to narrow the range down to the right unit for your space.
What is a reverse cycle air conditioner and how does it work?
A reverse cycle air conditioner is a single system that both cools and heats, using a heat pump that can run in either direction. In summer it draws heat out of your home and releases it outside. In winter it does the opposite, pulling warmth from the outside air and moving it indoors.
The easiest way to picture it is your fridge. A fridge takes heat out of the food compartment and releases it out the back. A reverse cycle system does the same job for a room, and it can switch which way the heat travels.
Because the system moves existing heat rather than generating it from scratch, it delivers more warmth per unit of electricity than a plug-in resistance heater. That is a large part of why reverse cycle systems are among the most widely used form of home climate control in Australia, and why several state energy programs actively encourage households to switch to them.
If you’re at the start of your research, our air conditioner buying guide walks through the wider decision, from system types to installation.
Inverter technology and energy efficiency ratings explained
Inverter technology lets the compressor vary its speed instead of switching fully on and off, so the system eases back once the room reaches temperature rather than cycling hard. Think of it as cruise control rather than stop-start driving: steadier, quieter and less wasteful.
Most reverse cycle systems sold in Australia today use an inverter compressor. In practice that means fewer temperature swings, lower noise, and less energy used holding a room at your set temperature.
Reading the Zoned Energy Rating Label
Non-ducted air conditioners sold in Australia carry a Zoned Energy Rating Label, which gives a seasonal efficiency rating across three climate zones (hot, average and cold) for both heating and cooling, up to a maximum of 10 stars each. Alongside the stars you’ll find estimated annual energy use in kilowatt hours, and a noise indicator in decibels for the indoor and outdoor units.
Two things are worth remembering when you compare. First, look at the zone that matches where you live, and the mode you’ll use most, because a Darwin household and a Hobart household are reading the same label very differently. Second, only compare systems of similar capacity and features, because the star rating is relative to size. More stars means the system uses less electricity to deliver the same output, provided it’s correctly sized for the space.
Ducted, multi-split and evaporative systems are not required to carry the label, although some display one voluntarily.
For a wider view of household running costs, see our guide to the best appliances to save on energy bills.
Sizing your reverse cycle air conditioner for your home
Capacity matters more than almost any other feature, and it’s the one most often got wrong. Capacity is measured in kilowatts, and as a starting point a well-insulated room needs roughly 0.125 kW to 0.15 kW for every square metre of floor space.
Space | Floor area | Typical capacity |
|---|---|---|
Bedroom or study | Up to 20 m² | 2.5 kW |
Small living area | 20 to 30 m² | 3.5 kW |
Medium living area | 30 to 45 m² | 5.0 to 6.0 kW |
Large open-plan area | 45 to 65 m² | 7.0 to 8.0 kW |
Treat those figures as a guide rather than a specification. Ceiling height, insulation, window size and orientation, floor coverings and your climate zone all shift the number. A west-facing living room with large windows needs more capacity than a shaded room of the same size.
Sizing cuts both ways. An undersized system runs flat out and still struggles on the hottest and coldest days. An oversized one reaches temperature quickly and then cycles off, which can leave the room feeling uneven and costs more up front than you needed to spend. For anything beyond a single room, ask for a proper load calculation rather than working from floor area alone.
Once capacity is matched to the space, the perfect air conditioner temperature for your home covers how to set it for comfort and efficiency.
Smart controls, quiet operation and air quality features
Beyond efficiency and capacity, these are the features that change how a system feels day to day.
Smart control. Wi-Fi connectivity lets you run the system from your phone, so you can warm the house on the way home or check you didn’t leave it running. Look for scheduling, and compatibility with the voice assistant you already use.
Air treatment. Most systems include washable filters that capture dust and airborne particles, and many add a dry or dehumidify mode that pulls moisture from the air without over-cooling the room. Self-cleaning functions dry the indoor unit after use to help keep the coil clean.
Quiet operation. Check the decibel figure on the energy label, particularly for bedrooms. Many systems offer a quiet or night mode that lowers fan speed and dims the display.
Sensors and airflow. Higher specification models add motion or human-detection sensors that direct airflow toward or away from people in the room, plus louvres that spread air more evenly through open-plan spaces.
Comparing split system, ducted, and portable options
The right system type comes down to how many rooms you need to cover, and what your home allows.
Split system | Window wall | Portable | |
|---|---|---|---|
Best for | One room or open-plan living | One room where an outdoor unit isn't practical | Renters, temporary needs |
Installation | Professional, fixed | Professional, fitted into a window or wall opening | Plug in, vent through a window |
Energy label | Zoned Energy Rating Label required | Zoned Energy Rating Label required | Zoned Energy Rating Label required |
Upfront cost | Moderate | Low to moderate | Lowest |
A split system is the most common choice for a single room or an open-plan living area, and it’s where the widest range and the clearest energy labelling sit. Browse split system air conditioners if that’s your likely direction.
A window wall unit is a single self-contained system fitted into a window opening or through an external wall, which suits homes with no room for an outdoor unit, or rooms where running pipework outside isn't possible.
Portable units need no installation and can move between rooms, which makes them the practical option for renters. They generally use more energy for the same cooling than a comparable fixed system, and single-duct models draw replacement air into the room from outside as they run.
For a wider view across cooling types, including evaporative, see our guide to the best home cooling systems.
Installation requirements
Split system and window wall installations need a qualified professional. Refrigerant work must be carried out by a technician holding the appropriate refrigerant handling licence, and the electrical work by a licensed electrician. Rebate schemes generally require an accredited installer as a condition of eligibility, so confirm that before you book anyone in.
Weighing up a replacement rather than another repair? Our guide to the signs you need a new air conditioner covers what to look for.
Find your perfect reverse cycle air conditioner at The Good Guys
Once you know your capacity, your climate zone and the features you want, the shortlist gets short quickly.
The Good Guys stocks reverse cycle systems from the brands Australians know, and our team can talk you through sizing, energy labels and installation in any of our stores nationally. To compare value across capacities, our current air conditioner deals are a good place to start.
Want a second opinion on what your living room needs? Shop the range, or pop in store and talk it through with our experts.
Looking for a reverse cycle air conditioner, you’ll find it at The Good Guys.
There’s no single best model, because the right system depends on your room size and your climate zone. For most homes the best choice is a correctly sized inverter split system with a strong Zoned Energy Rating Label score in the zone where you live. Match capacity to the space first, then compare star ratings between systems of a similar size.
Prioritise an inverter compressor, the correct capacity for your room, and a strong Zoned Energy Rating Label score in your climate zone. From there, weigh up the decibel rating if it’s going in a bedroom, Wi-Fi app control and scheduling, washable filters and a dry mode, zoning if you’re going ducted, and the warranty and servicing arrangements.
For heating, a reverse cycle system delivers more warmth per unit of electricity than a plug-in resistance heater, because it moves heat rather than generating it. Compared with other air conditioners, efficiency comes down to the individual model rather than the type. Split systems must carry a Zoned Energy Rating Label, which makes them easier to compare directly than ducted or multi-split systems, which are not required to display one.
Start with floor area and allow roughly 0.125 kW to 0.15 kW per square metre. A 20 m² bedroom typically needs about 2.5 kW, while a 45 m² open-plan living area is usually closer to 6.0 kW. Then adjust for ceiling height, insulation, window size and orientation, and your climate zone. For multi-room or whole-home systems, ask for a load calculation.
In some states, yes. Victoria runs the Victorian Energy Upgrades program, New South Wales the Energy Savings Scheme, South Australia the Retailer Energy Productivity Scheme, and the ACT offers the Home Energy Support Program. Discounts are usually applied by an accredited provider at installation, and the system generally needs to be on the program approved product register. Eligibility and amounts change, so check the official state program page before you buy.
Installation is normally quoted separately from the unit, and the price depends on the job rather than the model. The main variables are the distance between the indoor and outdoor units, wall construction, whether new electrical work or a dedicated circuit is needed, and access to the outdoor location. Ask for a site-specific quote, and check whether a state rebate scheme discount applies before you compare prices.
