Is R-410A Being Phased Out?
What this costs
| Option | Job | Low | High |
|---|---|---|---|
| Replace | AC Replacement | $3,800 | $9,050 |
What changed, when and who changed it
EPA issues these rules under the American Innovation and Manufacturing (AIM) Act of 2020. Here is how the dates moved.
- 2023 rule: set a limit of 700 for new home and light commercial AC and heat pump systems, with installation starting January 1, 2025.
- December 2023 interim rule: gave extra time, until January 1, 2026, to install equipment made or imported before January 1, 2025.
- May 21, 2026: EPA announced a final rule removing that installation deadline for systems where all the specified parts were made or imported before January 1, 2025.
- May 26, 2026: the final rule was published in the Federal Register, effective July 27, 2026.
What it means if you keep your system
EPA says the rule doesn't limit the use of any existing system and that nobody has to stop using equipment they have now. You can keep it for its useful life and keep repairing it. EPA also warns that refrigerant and parts may get harder to find over time as HFC supplies are phased down.
What it means if you replace your system
A complete new system generally has to use a refrigerant under the limit. EPA treats replacing both the outdoor condensing unit and the indoor coil as a new system, even if the refrigerant lines stay. An installer may still offer older R-410A stock if every required part was made or imported before January 1, 2025. We recommend asking for that in writing, along with parts availability and what warranty you get.
Don't try this yourself
We recommend leaving refrigerant work to a qualified HVAC technician. Don't open the refrigerant lines or add refrigerant yourself. Ask a licensed HVAC contractor which refrigerant your system uses.
What isn't settled
EPA's Q&A page, updated September 14, 2026, still gives the older January 1, 2026 date, while its sector table, updated August 28, 2026, shows no installation date for older stock, which matches the final rule. Refrigerant prices and supply over the coming years also aren't settled.
Common questions
Is R-410A banned?
Do I have to replace my AC because of this rule?
Why was the deadline changed?
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Last verified 2026-11-04
- EPA: Frequent questions on the phasedown of hydrofluorocarbons — Existing equipment may keep running; new systems must be under a GWP of 700; R-410A parts may service existing systems.
- EPA: Technology Transitions HFC restrictions by sector (updated Aug. 28, 2026) — GWP limit of 700 and January 1, 2025 installation date; no installation date for systems with all components made or imported before January 1, 2025.
- EPA: Reconsideration final rule, prepublication version (signed by the Administrator, 2026) — Removes the installation deadline for inventory made or imported before January 1, 2025; no change to replacement condensing units; effective 60 days after publication.
- EPA: Fact sheet on revised refrigerant rules — EPA announced the final compliance deadline revisions on May 21, 2026.
- Federal Register: Reconsideration final rule, 91 FR 31284 (2026-10387, May 26, 2026) — Published rule; effective July 27, 2026; removal of the installation deadline for inventory made or imported before January 1, 2025.
General information, not professional advice. Conditions, codes and prices vary. Turn off power, gas or water before any work, and hire a licensed professional when in doubt. Cost figures are our estimates, not quotes.