R-32 vs R-410A: what the 2025-26 refrigerant switch means for AC buyers
4 min read · updated September 14, 2026 · White Goods Verified
Between January 2025 and 2026, the refrigerant inside nearly every new air conditioner changed. The switch is good for the planet and mostly irrelevant to your comfort — but it created confusion that shows up in marketing claims and scare posts. Here is what actually changed, what it means for the unit you own, and what deserves exactly zero weight in your buying decision.
- Since January 2025, newly manufactured air conditioners use low-GWP refrigerants — R-32 in most room units, R-454B in much of central equipment.
- R-410A is not banned: existing units keep running and can still be serviced. Supply will shrink gradually over years, not overnight.
- R-32 is classified A2L ('mildly flammable') — a handling and installation consideration, not a household safety problem in normal use.
- Don't pay a premium for the refrigerant name — on today's window and portable units R-32 is simply what's inside. Judge by SACC/BTU, noise and price.
What changed, and when
Under the US phase-down of HFC refrigerants, manufacturers had to stop building R-410A equipment for 2025: new production from January 2025 onward moved to lower global-warming-promise (GWP) refrigerants — R-32 for most window and portable room units, R-454B in much of central HVAC.
Through 2025-2026 the transition completed: essentially every new room AC we track now ships with R-32. Old stock sold through, and both refrigerants coexist in the installed base for years.
Is R-32 dangerous? The A2L question
R-32 is classified A2L — 'mildly flammable.' It is hard to ignite and doesn't sustain a flame easily at room conditions, and units are engineered around it. For a window or portable unit in normal household use, it changes nothing about how you buy, install or live with it.
What it does change: technician handling rules — updated gauges, recovery equipment and installation practices. That is the reason the transition was phased over two years rather than overnight.
What happens to my old R-410A unit?
Nothing, legally. There is no ban on owning or servicing R-410A equipment — the rules apply to new manufacturing. Refrigerant for recharges remains available, and supply will shrink gradually over many years as production quotas tighten.
End of life matters more: when an R-410A unit is finally replaced, the refrigerant should be recovered and recycled rather than vented. Any competent installer does this as routine.
How to buy now
Every room AC in our database meets the current rules — the refrigerant is table stakes, not a feature. What separates units: honest cooling capacity (SACC for portables — see our sizing guide), published noise levels, efficiency (ENERGY STAR/CEER) and price.
If a listing advertises 'NEW R-32 TECHNOLOGY' as a selling point, read it as 'meets 2025 rules' — nothing more.
Frequently asked questions
Is my old R-410A air conditioner illegal now?
No. The rules apply to new manufacturing only. You can keep using it, and technicians can still recharge it — R-410A supply is phasing down over years, not switching off.
Can I still get R-410A refrigerant for a repair?
Yes. Reclaimed and existing stocks serve the installed base, and the phase-down schedule leaves years of margin. Recharges may cost more over time as supply tightens — worth weighing only when a unit needs a major repair anyway.
Is R-32 more efficient than R-410A?
Modestly — it transfers heat better and runs at higher pressure, which helps designers. But real-world efficiency comes from the whole design (compressor, coils, controls), so compare CEER or ENERGY STAR status, not the refrigerant name.
Machines this guide points to
Verified picks from our database mentioned in this guide — every price loads live from merchant listings.