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If you run an HVAC business, you've probably spent the last year fielding some version of the same question from every customer, supplier, and technician in your orbit: What's happening with R-410A?
The short answer: it's going away. The longer answer involves regulatory timelines, new refrigerant classifications, supply chain headaches, and a training overhaul that most contractors haven't started yet.
This guide breaks down the R-410A phase-out in practical terms.
What's happening with R-410A?
R-410A has been the workhorse refrigerant in residential and light commercial HVAC for over two decades. It replaced R-22 and became the industry standard. But with a global warming potential (GWP) of 2,088, it's now on the wrong side of federal climate policy.
Under the AIM Act — the American Innovation and Manufacturing Act of 2020 — the EPA is phasing down the production and consumption of hydrofluorocarbons (HFCs) by 85% by 2036, relative to a 2011–2013 baseline. R-410A, being a high-GWP HFC, is squarely in the crosshairs.
Here's the bottom line: new R-410A equipment is no longer being manufactured.
The industry is moving to lower-GWP alternatives. The only question is how fast the transition will be.
The timeline
January 1, 2025: The EPA banned the manufacture and import of new residential and light commercial AC and heat pump systems using refrigerants with a GWP above 700. That effectively ended production of new R-410A equipment.
Through 2025: Contractors could still install R-410A systems from existing inventory — units that were manufactured before the January 2025 cutoff.
January 1, 2026: The original installation compliance deadline. Under the EPA's Technology Transition Rule, certain R-410A equipment categories face restrictions on installation after this date.
- One caveat here: in March 2025, the EPA issued a memo signaling that enforcing the January 2026 installation deadline would be a low priority. The agency proposed eliminating the installation deadline entirely while it reconsidered the rule. That reconsideration is still underway.
January 1, 2028: Package units have a later compliance deadline, giving contractors in commercial applications a bit more breathing room.
Where that leaves you:
- The installation deadline is technically on the books but effectively on pause at the federal level.
- That said, individual states may enforce their own timelines. California and several other states aren't waiting around for the EPA to finalize its reconsideration.
The replacements: A2L refrigerants
The new generation of HVAC refrigerants falls into the A2L classification under ASHRAE Standard 34. That means low toxicity and mild flammability.
There are two main refrigerants to have on your radar:
R-454B (marketed as Puron Advance by Carrier):
A blend of R-32 and R-1234yf with a GWP of 466 — about 78% lower than R-410A. This is the refrigerant that Carrier, Daikin, Bosch, and Lennox have rallied behind for residential split systems. It offers comparable cooling capacity to R-410A and has been designed as a near drop-in replacement from an operational standpoint (though not a literal one — more on that below).
R-32
A single-component refrigerant with a GWP of 675. It's widely adopted internationally: Japan and Europe have been running R-32 systems for over a decade. In the U.S., Mitsubishi, Fujitsu, and some Daikin product lines use R-32, particularly in ductless mini-split and VRF applications.
Both refrigerants are legitimate, well-tested replacements. The choice between them largely depends on which OEM equipment you're installing and what application you're working in. Neither is objectively "better" — they just serve different segments of the market.
What “mild flammability” really means
The HVAC industry spent decades working with non-flammable refrigerants, so a shift toward something slightly more flammable may feel like a step backward. But the risk of fire incidents with A2L refrigerants is still incredibly low.
A2L refrigerants have a very low flame propagation speed and require a relatively high concentration to ignite.
Japan and Europe have more than a decade of real-world data with A2L systems, covering over 200 million installed units with zero reported fire incidents tied to the refrigerant itself.
While you can’t handle these refrigerants the same as you did R-410A, the risk profile is well understood and very manageable with the right equipment design and installation practices.
Modern A2L-rated equipment comes with built-in safety features, including integrated leak detection sensors that shut the system down if refrigerant concentration reaches 25% of the lower flammability limit, and electrical components rated for A2L environments.
Updated safety features and installation standards effectively neutralize any flammability issues.
What the R-410A phase-out means for your technicians
The biggest disruption for your technicians will be training.
Your technicians need to understand A2L handling procedures, including the use of spark-free tools, proper brazing techniques for A2L-rated systems, and leak detection protocols.
The EPA's Section 608 certification hasn't changed, but OEM-specific training programs are rolling out, and savvy contractors are already putting their teams through them.
Code compliance varies by jurisdiction. ASHRAE Standard 15.2, which governs safety for A2L refrigerants in residential applications, is being adopted unevenly across the country.
Some jurisdictions are ahead of the curve. Others haven't updated their codes yet. Know your local requirements, and if your local code hasn't caught up, your best bet is to follow the ASHRAE standard anyway.
Also: charge limits matter.
A2L refrigerant charge limits are calculated based on room size, which means technicians need to understand how to perform those calculations.
Oversized charges in undersized spaces create actual risk.
The supply chain reality
So far, the supply chain for A2L refrigerants has been a bit rocky.
R-454B in particular has faced significant shortages and price spikes. Some contractors have reported cost increases exceeding 300% for R-454B compared to what they were paying for R-410A.
Meanwhile, demand for R-410A has actually increased as contractors stock up to service existing systems and install remaining inventory.
This creates a strange middle period where the old refrigerant is more available (and often cheaper) than the new one. That will normalize as production scales up, but it's cold comfort if you're quoting a job today.
Smart contractors are managing this by building relationships with multiple distributors, pricing refrigerant costs into proposals as a variable rather than a fixed line item, and being transparent with customers about the supply environment.
Existing R-410A systems aren't going anywhere just yet
One of the most common misconceptions about the R-410A phase-out is that existing systems need to be replaced immediately.
R-410A equipment that's already installed will remain serviceable for years.
The EPA allows continued production and reclamation of R-410A refrigerant to service existing systems. The phase-out targets new equipment manufacturing, not the service aftermarket.
That said, R-410A prices will rise over time as supply tightens, which means maintaining older systems will get progressively more expensive. For customers running aging R-410A systems, the economic calculus will eventually tip toward replacement. Your job is to help them understand when that tipping point arrives — not to create urgency where none exists.
How to prepare your HVAC business
The transition will create inefficiencies for HVAC. But there are ways to mitigate issues as deadlines approach.
Get your team trained now
Don't wait for a job that requires A2L knowledge to realize your technicians aren't prepared. OEM training programs, ACCA resources, and distributor-led sessions are available. Use them.
Stock strategically
Maintain reasonable R-410A inventory for your service base, but start building A2L inventory and tools. Spark-free equipment, A2L-rated recovery machines, and updated leak detectors are all necessary purchases.
Update your pricing models
Refrigerant cost volatility is real. Build flexibility into your proposals and make sure your team understands how to communicate pricing chanok ges to customers without eroding trust.
Watch your state regulations
Federal enforcement may be flexible, but state-level enforcement can be stricter. If you operate in California, New York, or other states with aggressive climate policies, the timeline may be shorter than the federal one.
Talk to your customers
The refrigerant transition is confusing enough for people in the industry — imagine how your residential customers feel. Proactive communication builds trust. A short explanation on your website, in your proposals, and during service calls goes a long way.
The bottom line: Treat the R-410A as business transformation
The R-410A transition is happening fast, comes with a lot of regulatory complexity, and is happening in a tighter supply environment than previous transitions.
The contractors who come out ahead will be the ones who treat this like the business transformation it is.
They’ll invest in training, adapt their operations, and communicate clearly with customers while everyone else is still hoping the deadline gets pushed back again.
The best way to mitigate the inefficiencies that come with business transformation is to optimize operations everywhere else.
Applause Scorecards help HVAC operators get the most out of their technicians with zero administrative overhead. With Scorecards, you can track and reward technician performance automatically to drive results across the metrics that matter most to your business.
To learn more about how Applause can help you turn great service into business growth, chat with our team.
This guide was last updated in March 2026. Regulatory details may change as the EPA finalizes its reconsideration of the Technology Transition Rule. Always verify current requirements with your local jurisdiction and the EPA.
