Every aircon we install these days runs on R32 refrigerant. Most aircons installed in Singapore before around 2016 run on R410A. If you have never thought about which one is inside your units, that is normal, and honestly you have not missed much drama. But the difference starts to matter the moment you face a gas top up, a big repair or a replacement decision. So here is the R32 vs R410A story from the people who handle both gases every single day.
The two minute version
R410A was the standard refrigerant for about fifteen years. It cools well and it is completely non flammable, but it is a heavy climate offender when it leaks, and the world is phasing it down.
R32 is the current standard. It transfers heat better, needs less gas in the system, has about one third the global warming impact of R410A, and every 5-tick system sold in Singapore today runs on it. It is classified as mildly flammable, which sounds scary but matters very little in practice for a properly installed wall mounted system.
You cannot mix them, you cannot top up an R410A system with R32, and you cannot convert an old system from one gas to the other. Whatever gas your system was born with is the gas it lives with.
Why the industry switched
The main reason is climate rules. Refrigerants are scored by Global Warming Potential, or GWP. R410A scores around 2,088, meaning a kilogram of it leaking does about two thousand times the warming damage of a kilogram of CO2. R32 scores around 675. Singapore moved with the rest of the world on this: since late 2022, NEA only allows new household aircons using refrigerants with a GWP below 750, which in practice means R32.
The switch was not pure sacrifice though. R32 is simply a better refrigerant for splits. It carries more heat per kilogram, so systems need roughly 20 to 30 percent less gas. It is a single component gas rather than a blend, which makes it easier to manufacture, recycle and top up accurately. And it is part of why modern 5-tick systems post energy numbers that old R410A units cannot touch.
What about the flammable part?
R32 is rated A2L, which means mildly flammable under specific conditions: a significant concentration in an enclosed space meeting an ignition source. A wall mounted split holds a small charge of gas, the units sit in ventilated rooms, and installation standards account for the rating. Millions of R32 systems run across Asia without incident. We take the normal precautions during installation and servicing, and this is genuinely not something a homeowner needs to lose sleep over.
R410A is rated A1, non flammable, which was its one real advantage. In exchange it operates at very high pressures and, again, does twenty times the climate damage of CO2 per kilogram when it escapes.
What this means for your wallet
If you own an R32 system: nothing to do. You are on the current standard, gas is cheap and plentiful, and every technician carries it. Just keep the system serviced so it never needs a top up in the first place, because topping up gas without fixing the leak that lost it is burning money, something we explain in detail on our gas top up page.
If you own an R410A system: it is still fully serviceable and R410A gas is still available in Singapore, including from us. But the economics are slowly tilting. As production phases down worldwide, R410A prices trend up, not down. The system itself is also by definition at least eight or nine years old now. Our honest rule of thumb: keep servicing it while it runs well, but once it needs a major repair like a compressor or PCB replacement, get a quote for a new R32 system before you approve the repair. Between the better efficiency, the 5-tick energy label savings and grants like the EEG for businesses and HDB Climate Vouchers for 5-tick systems, the replacement maths often wins by year two or three.
If you are buying new: there is no decision to make. Everything current is R32, from a single bedroom unit to the multi split systems in our shop. If a seller offers you a suspiciously cheap brand new R410A system, that is old stock being cleared, and we would walk away.
The questions we get every week
Can I top up my R410A aircon with R32 since it is cheaper? No. Different gases, different pressures, different oil compatibility. Mixing them can destroy the compressor. Any technician who offers this is someone to avoid.
My unit is R22, not R410A. What now? Then your system is even older, likely fifteen plus years, and R22 supply in Singapore is drying up for good. Replacement is not urgent while it works, but plan for it rather than getting surprised.
Does R32 cool better? The gas itself transfers heat more efficiently, but what you actually feel comes from the whole system. A modern R32 inverter system will outperform a tired R410A unit clearly, mostly because everything about it is ten years newer.
Is my R410A system about to become illegal? No. The rules apply to the sale of new equipment, not to what is already on your wall. Run it as long as it makes sense.
Not sure what gas your system uses?
If you would rather have a professional handle this, our aircon installation in Singapore service covers exactly this kind of job.
Check the sticker on the side of your outdoor unit, it states the refrigerant type. Or just send us a photo of your outdoor unit on WhatsApp at +65 8818 5781 and we will tell you what you have, how it is doing and what we would honestly do in your position. With 1,800+ Google reviews, we would rather tell you to keep your old unit another two years than sell you something you do not need yet.
