The R-454B Refrigerant Transition: What Small HVAC Shops Need to Track

This is a follow-up to our EPA 608 recordkeeping guide — the transition described here adds to those obligations, it doesn't replace them. If refrigerant tracking is new territory, start with that guide first.

What's actually changing

Under the AIM Act's HFC phasedown, manufacturing of new R-410A residential and light-commercial AC equipment has already stopped, with new equipment required to use lower-GWP A2L (mildly flammable) refrigerants — most commonly R-454B or R-32. January 1, 2026 is the deadline to finish installing R-410A equipment that was manufactured before 2025; after that, new installs are effectively A2L-only. That said, multiple industry sources reported EPA signaling low enforcement priority on that specific deadline while related rules are reconsidered — worth confirming current enforcement posture directly before treating it as a hard cutoff for your shop.

New handling requirements, on top of EPA 608

Section 608 certification is still required for any refrigerant work — that part doesn't change. What's added on A2L systems specifically:

• ASHRAE 15 calls for documented A2L safety training beyond base 608 certification, and some jurisdictions are folding A2L competency into local licensing — worth checking what your state/city actually requires.
• No open flames or spark-producing, non-intrinsically-safe tools inside the hazard zone while handling A2L refrigerant.
• Recovery machines, gauges, hoses, and vacuum pumps need an A2L-rated certification mark — existing R-410A tooling isn't automatically compatible and needs to be verified, not assumed.
• A double-purge brazing procedure (nitrogen purge, evacuate, purge again, evacuate again before opening the circuit) is the reported standard for R-454B specifically, to fully clear refrigerant before brazing or cutting.

What this means for your recordkeeping

The leak-rate thresholds and documentation obligations from the EPA 608 guide still apply — R-454B doesn't get a separate rulebook there. What actually gets harder is the transition period itself: most shops will be running a mixed fleet of R-410A and A2L equipment for years, which means refrigerant logs, cylinder inventory, and technician certification records all need to track which refrigerant type each job and technician actually involved — not just that tracking happened. That's a meaningfully bigger ask of a spreadsheet than a single-refrigerant shop ever had.

This is the same gap purpose-built tools like RefriTrak are meant to close — audit-ready tracking tied to the specific job and refrigerant, not a general notes field. See the full RefriTrak review for whether it's worth it at your shop's size.

This page is general information, not legal advice, and A2L enforcement/licensing details are actively being reconsidered at the time of writing. Confirm current requirements for your specific equipment, refrigerant, and jurisdiction directly with EPA guidance or a compliance professional before treating any date or procedure on this page as final.