You've heard that HVAC refrigerant is being "phased out," and now you're wondering the practical question: does this affect the system I already own, do I have to do something about it, and is it going to cost me? Maybe your tech mentioned it, or you saw it while shopping for a new unit.
The straight answer below focuses on the timeline and what it actually means for you. We'll cover which refrigerants are being phased out and when, whether you need to act on your current system (short version: almost certainly not right now), and how this changes things if you're buying.
If you want the deeper breakdown of what each refrigerant is and how safe it is, see our guide to HVAC refrigerant types; this page covers the phase-out itself, with dates and figures from the EPA.
R-410A, the refrigerant in most homes today, is being phased out of new equipment, not out of use. As of January 1, 2025, manufacturers can no longer build new home AC or heat pump systems using R-410A, because it exceeds the EPA's new limit on refrigerant climate impact.
But if you already own an R-410A system, it stays completely legal to run and service. Nobody has to replace a working unit.
The timeline: what's happening and when
The phase-out is happening in stages under a federal law called the AIM Act of 2020, which directs the EPA to phase down high-impact refrigerants (HFCs). The sequence that matters to homeowners runs like this:
| When | What happened / happens |
|---|---|
| 2020 | The AIM Act becomes law, directing an 85% phasedown of HFC production by 2036. |
| Jan 1, 2025 | New home AC and heat pump equipment can no longer be manufactured or imported using R-410A (it's over the EPA's 700-GWP limit). New systems now use R-32 or R-454B. |
| July 27, 2026 | An EPA rule finalized in May 2026 removes the installation deadline: pre-2025 R-410A equipment can be installed until existing stock runs out. New York keeps its January 1, 2026 deadline under state rule Part 494. |
| Ongoing | R-410A remains available to service existing systems, but supply tightens and prices rise gradually over the coming years, the same pattern R-22 went through before it. |
The key thing this timeline shows: the January 2025 date changed what gets manufactured, not what you're allowed to use. There's no date on which your existing system becomes illegal or unserviceable.
"Do I need to do anything about my current system?"
For almost everyone, the answer is no, not right now. It depends on what you have:
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If you have an R-410A system (most homes with equipment from ~2006–2024): keep it. It's legal, serviceable, and fine to run for its normal lifespan. The one practical adjustment: stay on top of maintenance and fix any refrigerant leaks promptly, because as R-410A supply tightens, topping off a leaky system gets more expensive. But that's "maintain your system normally," not "replace it now."
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If you have an R-22 system (equipment older than ~2010): this one is a genuine "start planning" situation, but because of age, not the current phase-out. R-22 was already phased out years ago (production ended January 1, 2020), so it's now scarce and expensive to service. If you're running R-22, your system is well over a decade old and nearing the end of its life anyway. See our refrigerant types guide for the full R-22 cost picture.
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If you're not sure what you have: check the data plate on your outdoor unit, it lists the refrigerant. Our refrigerant types guide walks through how to read it.
The bottom line: the phase-out is a slow, planned transition, not an emergency. You replace your system when it reaches the end of its life or a major component fails, on your schedule, and the new one will simply use a current refrigerant.
"Does this change anything if I'm buying a new system?"
Yes, but in a way that mostly takes care of itself. Any new home AC or heat pump you buy in 2026 already uses one of the two current refrigerants:
- R-32 (common in ductless mini-splits and many residential systems), or
- R-454B (common in ducted systems).
Both have far lower climate impact than R-410A and are the compliant replacements. You don't need to hunt for a specific one, the manufacturer already made that choice for the equipment. What this means practically:
- Don't buy an old R-410A system to "avoid the change." Some installers may still have pre-2025 R-410A inventory. Buying one isn't illegal, but you'd be buying into the refrigerant that's being phased out, with the tightening service supply that comes with it. A new R-32 or R-454B system is the forward-looking choice.
- The refrigerant shouldn't drive your decision. Both current refrigerants are safe and efficient. Choose your system on sizing, efficiency (SEER2), install quality, and warranty, not on which low-impact refrigerant is inside. Our refrigerant types guide compares R-32 vs R-454B in detail if you're curious.
Why this is happening (the short version)
Refrigerants like R-410A are potent greenhouse gases, R-410A traps roughly 2,088 times as much heat as CO₂ over 100 years (that's its GWP, per the EPA). The AIM Act and the EPA's Technology Transitions program are phasing down these high-GWP refrigerants in favor of lower-impact ones (R-32's GWP is 675; R-454B's is 466).
The 700-GWP cap on new home HVAC equipment is what pushed R-410A (at 2,088) out of new manufacturing. It's the same kind of transition that phased out R-22 for ozone reasons a decade ago, planned, staged, and designed so existing equipment keeps running.
Frequently asked questions
Is R-410A being phased out? Yes, but only from new equipment manufacturing, not from use. Since January 1, 2025, new home AC and heat pump systems can't be built with R-410A. Your existing R-410A system is still legal to run and service, and pre-2025 equipment can still be installed until supplies run out.
Do I have to replace my R-410A air conditioner? No. An existing R-410A system is legal and serviceable for its normal lifespan. You replace it when it wears out or a major component fails, on your own schedule, not because of the phase-out. Just keep up with maintenance and fix leaks promptly, since R-410A service supply tightens over time.
What refrigerant replaces R-410A? New home systems use either R-32 or R-454B, both have much lower climate impact than R-410A. R-32 is common in mini-splits; R-454B is common in ducted systems. The manufacturer selects the refrigerant for the equipment, so you don't choose it separately.
Will R-410A get more expensive? Gradually, yes. R-410A remains available to service existing systems, but as the AIM Act phasedown tightens supply, prices will rise over the coming years, the same pattern R-22 followed. This is a reason to fix leaks promptly and maintain your system, not a reason to replace a working unit now.
When do I actually need to worry about this? When your system reaches the end of its life (which for an AC or heat pump usually means well over a decade of service) or needs a major repair. At that point you replace it with a current-refrigerant system. Until then, an R-410A system needs no special action beyond normal maintenance.
About these figures
The phase-out dates, the 700-GWP equipment limit, and the AIM Act's 85%-by-2036 target are from the U.S. EPA's AIM Act and Technology Transitions rulemakings. The GWP figures (R-410A 2,088; R-32 675; R-454B 466) are from the EPA's Technology Transitions GWP Reference Table (the values codified at 40 CFR §84.64).
Where a date reflects a finalized EPA rule with a specific effective date, we've noted it. For the full detail on what each refrigerant is, its safety classification, and how to identify what's in your system, see our companion guide to HVAC refrigerant types.