Refrigerants are the “working fluid” inside every air conditioner. They absorb heat from inside your home and release it outdoors, allowing your AC to cool (and in reverse-cycle systems, heat) your space efficiently.
Different refrigerants perform differently in terms of efficiency, environmental impact, safety, and long-term cost. This guide explains the most common refrigerants used in Australia so you can better understand your AC system and make informed decisions.
What Are Refrigerants and Why Do They Matter?
Refrigerants determine:
- How efficiently your AC cools and heats
- Your electricity costs
- How environmentally friendly the system is
- Maintenance and servicing requirements
- System lifespan and performance
Modern air conditioners in Australia primarily use R32 or R410A, but older systems may use refrigerants that are now being phased out.
R32 Refrigerant (Modern Standard)
R32 is currently the most widely used refrigerant in new air conditioning systems in Australia.
Manufacturers like Daikin, Fujitsu, Mitsubishi, Panasonic, and Samsung are shifting almost all new models to R32.
Key Benefits
- High efficiency → uses less electricity
- Lower global warming potential (GWP) (~675)
- Requires less refrigerant per system
- Better cooling performance
- Easier servicing and maintenance
Safety
- Classified as A2L → mildly flammable, but safe for residential and commercial installations when installed by licensed professionals.
Where You’ll Find It
- Most new split systems
- Many ducted systems
- Some VRV/VRF systems (transitioning from R410A)
R32 is the recommended choice for most new AC installations today.
R410A Refrigerant (Being Phased Out Gradually)
R410A was the dominant refrigerant from the mid-2000s to early 2020s, used widely in split, ducted, and commercial systems.
Key Facts
- Non-flammable
- Reliable and proven performance
- Still used in many existing systems
Limitations
- High global warming potential (GWP ~2088)
- Less energy-efficient compared to R32
- Requires more refrigerant volume
- Gradually being phased out under international environmental standards
Where You’ll Find It
- Older split systems
- Older ducted systems
- Earlier VRV/VRF systems
If your system uses R410A and is older than 10–12 years, upgrading to an R32 system can significantly reduce running costs.
R22 Refrigerant (Obsolete – No Longer Allowed)
R22 (also known as HCFC-22) was used for decades but is now banned in Australia.
Why It Was Phased Out
- Very high ozone depletion potential
- High environmental impact
- Cannot be manufactured or imported
- Only recycled supply remains
If Your AC Still Uses R22
- Repairs involving refrigerant are extremely expensive
- Replacement parts are limited
- Upgrading is strongly recommended
If your AC uses R22, replacement is more cost-effective than repair.
R454B and Other Next-Generation Refrigerants
A new generation of low-GWP refrigerants is emerging, especially in commercial and VRF systems.
Examples:
- R454B
- R466A
- R290 (Propane) – high efficiency but requires strict safety measures
- R513A
These refrigerants focus on:
- Lower environmental impact
- High efficiency
- Compatibility with future regulations
Most homes in Australia will still see R32 as the primary standard for years to come.
R32 vs R410A: Quick Comparison
| Feature | R32 | R410A |
|---|---|---|
| Energy Efficiency | ⭐⭐⭐⭐⭐ Higher | ⭐⭐⭐⭐ Good |
| GWP (Environmental Impact) | ~675 (low) | ~2088 (high) |
| System Charge | Lower | Higher |
| Cooling Performance | Excellent | Very good |
| Future Availability | Long-term | Declining |
| Cost to Maintain | Lower | Higher (due to phase-out) |
R32 wins in nearly every category.
Why Refrigerant Choice Matters for Sydney Homes
Sydney’s climate demands:
- Efficient cooling in summer
- Reliable heating in winter
- Low running costs
- Environmentally responsible solutions
R32 systems perform exceptionally well in these conditions and offer long-term savings.
Do You Need to Change Refrigerants?
No — you cannot “swap” refrigerants.
Different refrigerants require different:
- Compressors
- Pressure levels
- Pipe diameters
- Oils
- Electronics
If your system uses R410A or R22, the correct solution is system replacement, not a refrigerant change.
Signs Your Refrigerant Levels Need Checking
- AC not cooling as well as before
- Hissing or bubbling sounds
- Ice on the outdoor or indoor coil
- Higher electricity bills
- System shutting off unexpectedly
Refrigerant handling must legally be done by an ARCtick-licensed technician.
Our Recommendation
For new installations and system upgrades, we recommend R32-equipped air conditioners due to their efficiency, reliability, and future-proof design.
Need Help Choosing the Right System?
We provide:
- Refrigerant diagnostics
- Energy efficiency checks
- System upgrades to R32
- Expert AC installation and replacement guidance
Book a free consultation and let our licensed technicians help you choose the right system for your home.
