EPA's R-410A Rule Just Changed Again

On May 26, 2026, the EPA reversed a deadline it had spent years building toward. The rule that was supposed to stop new R-410A installations on January 1, 2026 no longer applies. Once the reversal takes effect on July 27, 2026, contractors can keep installing R-410A split systems manufactured before January 1, 2025, until the existing supply runs out.

That's the calm part of the story. It took less than a month for the rest of it to show up. Three major HVACR trade groups sued the EPA on June 25 over a different piece of the same regulatory package. By July 1, roughly two dozen manufacturers had already locked in price increases on the parts and equipment contractors buy every week. And at least one state made clear it isn't following the federal reversal at all. Here's what actually changed, what's still moving, and what to do about it before the effective date hits.

What the EPA actually reversed on May 26

The original rule, built on the American Innovation and Manufacturing (AIM) Act of 2020, said contractors and builders could not install any split HVAC system manufactured before January 1, 2025 that used a higher-GWP refrigerant like R-410A, effective January 1, 2026. Late in 2025, the EPA signaled it would deprioritize enforcement of that deadline over concerns about A2L refrigerant availability and cost in the field, then proposed formal changes that fall.

The final version of that change was published May 26, 2026, as a rule titled "Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements," according to the Federal Register and confirmed the same day by the National Association of Home Builders. The rule becomes effective July 27, 2026. Once it does, existing R-410A HVAC equipment can continue to be installed with no installation cutoff date, as long as it was manufactured or imported before January 1, 2025.

There's a real limit behind that, though. No new complete R-410A systems are being manufactured anymore, so the existing supply is finite and will eventually run out on its own. Manufacturers are still producing individual components for older systems for repair and maintenance purposes, and R-410A itself is being phased down on a fixed schedule that reduces production year by year until it reaches roughly 15% of current output by 2036. A separate, narrower rule applies to products that don't require field assembly, like window air conditioning units: those get a final sale date of three years after their manufacture compliance date, no later than January 1, 2028, with no separate installation deadline attached.

The catch: New York didn't reverse anything

Here's where a lot of contractors are going to get caught off guard. New York passed a statewide law that codified the original January 1, 2026 deadline directly into state regulation, under DEC Part 494/495. That means no R-410A systems can be installed in New York, full stop, regardless of what the federal government just did. The federal reversal changes nothing there.

This isn't an isolated case of one state going its own way, either. On July 1, 2026, appellate courts in both New York and California upheld state-level appliance gas bans in separate rulings, a reminder that the regulatory patchwork around HVAC and appliance rules is getting more complicated at the state level even as the federal government loosens up. The practical takeaway is blunt: checking the federal rule is no longer enough. Every contractor working across state or even county lines needs to check state and local law before assuming the July 27 reversal applies to a specific job.

Then three trade groups sued the EPA over a different part of the same rule

On June 25, 2026, HARDI, PHCC, and ACCA filed a federal lawsuit challenging the same overall EPA rule package, but a different section of it: the provisions extending compliance timelines for commercial refrigeration equipment. It's worth being precise here, because it's a detail that's easy to get wrong: these three groups are not challenging the R-410A residential deadline reversal. They actually support that part. The lawsuit is aimed specifically at the commercial refrigeration provisions.

Talbot Gee, HARDI's president and CEO, called the commercial provisions legally flawed and economically reckless. HARDI's VP of government affairs, Alex Ayers, said the group projects refrigerant prices could climb 12% to 24% by 2029 as a result, working out to roughly 4% to 8% a year over the next three years. PHCC CEO Cindy Sheridan and ACCA's Martin Hoover, who stepped into the role of interim CEO amid a recent leadership change at the association, joined the suit alongside Sean Robertson, ACCA's VP of government relations. Combined, the groups estimate the commercial provisions could add $8 billion in refrigerant costs industry-wide, with a broader economic impact closer to $13 billion once downstream effects are counted.

What the lawsuit's warning means for the field

Robertson's comments in the same reporting carried a direct message for working technicians: this is not the time to simply top off a leaking system and move on. With refrigerant costs already trending upward and commercial provisions now in active litigation, the advice from ACCA is to recover refrigerant properly rather than patch a leak, and to start having financing conversations with commercial customers about full A2L conversions instead of extending the life of aging R-410A equipment piecemeal.

The same reporting laid out New York's specific refrigerant phaseout schedule for context on where things are headed regardless of how the federal lawsuit resolves: heat pump water heaters in 2027, chillers and VRF systems in 2030, and most residential and light commercial systems by 2034. The federal fight over commercial refrigeration timelines doesn't change that state-level clock. It keeps running either way.

July's price increases have nothing to do with the lawsuit

Separately from all of the above, ACHR News published a running list of HVAC manufacturer price increases for July 2026 on July 1. Roughly two dozen manufacturers are raising prices across parts and equipment categories this month, and the increases range from about 3% to more than 10% depending on the product line. A sample from that list: Allstyle Coil at 3.5%, Duravent Group at 7%, JB Industries at 7.5% on brass valves and 10% on vacuum pump oil, Johns Manville at 6% to 8%, Jones Stephens at 3% to 10% on PEX products, Advanced Distributor Products up to 5% on evaporator coils, Fujitsu at 7%, Nidec-US Motors at 3% to 6.5%, Quietflex at 6% to 8%, and CertainTeed at 6%.

These increases were already locked in before the trade-group lawsuit was filed and aren't a reaction to it. They reflect the broader cost pressure of the refrigerant transition working its way through supply chains regardless of how any single piece of litigation resolves. For a contractor pricing a job this month, it means the parts list underneath a quote is worth double-checking against current supplier pricing rather than a price sheet from even a few weeks ago.

The A2L basics, for anyone who skipped straight to "what do I do"

All of this regulatory back-and-forth exists because of the shift to A2L refrigerants, chiefly R-454B and R-32, which replace R-410A in new equipment. The AIM Act sets a global warming potential threshold of 700; refrigerants above it, including R-410A at roughly 2,088 GWP, are being phased down, while R-454B (around 466 GWP) and R-32 (around 675 GWP) fall under that line. Under ASHRAE Standard 34, A2Ls are classified as mildly flammable, distinct from the highly flammable A3 class that includes refrigerants like propane. That classification is why A2L systems require different leak detection equipment, different fittings, and installation practices that older R-410A-trained technicians need to be specifically certified on before working with them. None of that changes because of the rule reversal. It only affects when older R-410A equipment can still legally go into the ground.

What to actually do before July 27

A few practical moves matter more than tracking the news cycle itself. First, verify state and local rules before assuming the federal reversal applies to a job, especially in New York or any jurisdiction that has passed its own refrigerant timeline. Second, get current pricing from suppliers before quoting jobs this month, given how many manufacturers have already raised prices in July. Third, stop treating refrigerant leaks as a top-off-and-move-on fix; proper recovery and a real conversation about full replacement protects both the customer and the business from a compliance and cost standpoint. Fourth, keep an eye on the commercial refrigeration lawsuit, since it doesn't touch the residential R-410A reversal directly but could still reshape commercial-side costs depending on how it resolves. And finally, expect customer confusion. A homeowner who read about a January 1, 2026 deadline eight months ago is not going to know it was reversed in May unless someone tells them.

Key dates at a glance

DateEventJanuary 1, 2026Original deadline that would have blocked new installs of pre-2025 R-410A split systems (since reversed)May 26, 2026EPA publishes final rule reversing the January 1, 2026 installation deadlineJune 25, 2026HARDI, PHCC, and ACCA sue the EPA over the same rule's commercial refrigeration provisionsJuly 1, 2026Roughly two dozen manufacturers' July price increases take effect; NY and CA appellate courts uphold state appliance gas bansJuly 27, 2026EPA's reversal officially takes effect; R-410A installs of pre-2025 equipment can continue federallyJanuary 1, 2028Final sale deadline for non-field-assembled products like window AC units using R-410A2036R-410A production phased down to roughly 15% of current output

FAQ

Is the January 1, 2026 R-410A installation deadline still in effect? No, not federally. The EPA reversed it in a final rule published May 26, 2026, which takes effect July 27, 2026. Contractors will be able to install R-410A split systems manufactured before January 1, 2025, until existing supply runs out. State and local rules can still be stricter, and New York has already codified the original deadline into its own law.

Does the trade-group lawsuit affect the R-410A residential deadline reversal? No. HARDI, PHCC, and ACCA's June 25, 2026 lawsuit challenges a different part of the same overall EPA rule package, specifically the commercial refrigeration compliance timelines. All three groups support the residential R-410A deadline reversal and aren't challenging it.

Can new R-410A systems still be manufactured? No. No new complete R-410A HVAC systems are being manufactured. What's changed is that existing units made before January 1, 2025 can still be installed once the July 27 reversal takes effect, and manufacturers are still producing individual components for maintenance and repair of older systems.

Why are HVAC parts prices going up this month if the deadline was reversed? The two aren't directly connected. Roughly two dozen manufacturers raised prices on parts and equipment in July 2026, reflecting broader refrigerant-transition cost pressure across the supply chain, not a reaction to the lawsuit or the deadline reversal.

What should a contractor do if a customer asks about the January 1 deadline they heard about last year? Explain plainly that the deadline was reversed as of a rule taking effect July 27, 2026, but that state and local rules can still be stricter, and that leaking older systems are still worth evaluating for proper recovery or full replacement rather than a quick patch, given where refrigerant costs are headed either way.

It's a lot to track for a business that's also supposed to be answering phones, running trucks, and following up on estimates. That's usually where the compliance news and the day-to-day operations collide: a homeowner calls asking whether their system is still legal to repair, or a commercial customer wants a straight answer on refrigerant costs before signing off on a quote, and someone on staff has to be available to give it. AI Savvy's automation handles the operational layer around conversations like that, answering calls, following up on estimates, and keeping customers informed, so the team can spend its attention on the actual refrigerant transition instead of chasing callbacks.

Read more on AI Automation for HVAC Business, see how missed-call recovery works in the Missed Call Text-Back Guide, check out the case studies, or book a free operations audit to see where automation could help your business handle a stretch like this one.

Sources cited: National Association of Home Builders (NAHB), "EPA Finalizes Refrigerant Rule Update to Allow Older HVAC Unit Installation," May 26, 2026; EPA/Federal Register, "Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements," final rule published May 26, 2026; ACHR News (Dana Slone), "HVACR Trade Groups Challenge EPA Refrigerant Rule in Federal Court," June 25, 2026; ACHR News (Dylan Kurt), "HVAC Price Increase List: July 2026," July 1, 2026.