Most homeowners have no idea how old their air conditioner is. The paperwork's long gone, the previous owner didn't leave notes, and the unit outside just... hums along until it doesn't. But there's a date stamp hiding in plain sight: the refrigerant it runs on.
The industry has switched refrigerants twice in the last twenty years, on a schedule. So if you know which one is in your system, you know — within a few years — how old it is. And that changes the math on whether your next repair is worth it.
30-second check
How to find your refrigerant
Look at the outdoor unit
Walk out to the condenser (the big box outside) and find the rating plate — a metal or sticker label on the side. Look for a line that says “Refrigerant,” “Factory Charge,” or “REFG.” It'll read R-22, R-410A, R-454B, or R-32. That one word tells you most of what you need to know. (No luck reading it? Snap a photo of the whole label and we'll tell you what you've got.)
The timeline
Three refrigerants, three eras
Era one
R-22 “Freon” — before ~2010
R-22 ran nearly every home AC for decades. It's an ozone-depleting refrigerant, so under the Montreal Protocol the U.S. banned new production and import of R-22 on January 1, 2020. The only R-22 left now is reclaimed and recycled — which is why the price per pound has climbed for years and keeps climbing.
If your unit runs R-22
It was almost certainly installed before 2010 — so it's 16+ years old. It can still be serviced, but a refrigerant leak is the expensive scenario: topping off an R-22 system can cost more than the repair itself. We'll always fix what's fixable, but at this age it's smart to start planning a replacement on your timeline, not on an emergency 100° afternoon.
Era two
R-410A “Puron” — 2010 to 2024
R-410A replaced R-22 and became the standard for about fifteen years. It doesn't harm the ozone layer, but it's a potent greenhouse gas, so the federal AIM Act set it up to be phased down. Newly manufactured home systems moved to lower-impact refrigerants beginning in 2025 — but here's the part that matters: R-410A is still made for servicing existing systems, and will be for years. Your R-410A unit is not in trouble.
If your unit runs R-410A
You're somewhere in the 2010–2024 range — roughly 2 to 16 years old. Keep it, maintain it, and repair it. There's no reason to rip out a healthy R-410A system, and anyone telling you the refrigerant change forces you to replace is selling fear. Just know that when it does reach the end, its replacement will run one of the newer refrigerants below.
Era three
R-454B & R-32 — 2025 and newer
The current generation. Both are low global-warming-potential refrigerants (mildly flammable “A2L” class, which is why installs now follow updated safety practices). Manufacturers split on which they adopted: Carrier, Trane, American Standard, Lennox and Rheem went with R-454B; Daikin, Goodman and Amana went with R-32. As an American Standard dealer, the systems we install run R-454B.
If your unit runs R-454B or R-32
It's brand new — 2025 or later. You're on the current standard, with the best efficiency and the longest runway ahead of you. Nothing to do but maintain it.
The honest part
So — repair or replace?
We're a repair-first company. Refrigerant type is a clue about age, not a verdict. But paired with a real diagnosis, it sharpens the decision:
- R-454B / R-32: practically new. Repair, always.
- R-410A, running well: maintain and repair. It's got years left.
- R-410A, 12+ years old with a big-ticket failure: get honest numbers on both paths — sometimes the repair still wins, sometimes a new high-efficiency system does.
- R-22 with a refrigerant leak: this is where replacement usually pencils out, because the refrigerant alone can cost a small fortune.
Want the deeper dive on the regulations behind all this? We wrote one: 2026 Refrigerant Regulations: What Arkansas Homeowners Need to Know.
Not sure what you've got, or staring at a repair quote and wondering if it's worth it? That's exactly the call we like to get. We'll read your label, give you a straight diagnosis, and lay out both options in plain English — book an AC repair & diagnostic, or if it's time, see AC installation.