What does EPA Section 608 require of HVAC employers?

The certification attaches to people, not to the company licence.

Under 40 CFR 82.161, anyone who could reasonably be expected to violate the integrity of the refrigerant circuit while maintaining, servicing, repairing or disposing of appliances containing CFC/HCFC or non-exempt substitute refrigerants such as HFCs must pass an exam from an EPA-approved technician certification program.

On a residential or light-commercial crew, that is every installer and service tech who opens a system — and it covers disposal work too, not just repairs.

There are four certifications, and the type has to match the equipment on the truck.

Type I covers small appliances — fully manufactured, charged and hermetically sealed in a factory with 5 pounds or less of refrigerant: refrigerators, window and portable air conditioners, PTACs, dehumidifiers, vending machines and water coolers.

Type II covers medium-, high- and very-high-pressure appliances other than small appliances, which is the certification that covers residential split-system air conditioners and heat pumps — R-410A sits here, because EPA classifies it as a high-pressure refrigerant, not a very-high-pressure one.

Type III covers low-pressure appliances such as chillers using R-11 or R-123, and Universal covers all three.

Apprentices are the one exception, and it is narrow: the exemption applies only while the apprentice is closely and continually supervised by a certified technician, the supervising technician and the apprentice share responsibility for compliance, and the rule sets no time limit on the exemption — the supervision is the condition, not a clock that runs out.

Put the supervision assignment on the schedule, not just in the file, because the certified tech is on the hook alongside the apprentice.

Two edge cases round it out.

Air conditioning on off-road farm and construction equipment counts as MVAC-like, and a technician may service it holding either Type II or Section 609.

And checking the card itself is a hiring step, not a compliance afterthought — how to verify a candidate's 608 card alongside state licences is in our guide to verifying licences and certifications before you hire.

The sales restriction decides who can buy refrigerant at the supply house.

Only EPA-certified technicians may buy ozone-depleting or substitute refrigerants such as HFCs — Section 608 for stationary equipment, Section 609 for motor vehicle air conditioning — with limited exceptions.

The exception that matters to you is the employer route: a company may buy refrigerant if it gives the wholesaler written evidence that it employs at least one certified technician.

Keep that written evidence on file with each supply house, and refresh it when your certified staff changes.

The cards do not cross over.

A Section 609-certified technician — your auto-AC people — cannot buy refrigerant intended for stationary equipment, regardless of container size.

On the other side, the restriction does not cover equipment or components that already contain refrigerant, and small cans of MVAC refrigerant — 2 pounds or less, with a self-sealing valve — may still be sold to uncertified do-it-yourselfers.

That is the retail shelf, not a route around the rule for your vans.

Buying outside the restriction is not a paperwork slip — it is a Clean Air Act violation.

EPA's inflation-adjustment table sets the maximum civil penalty under Clean Air Act Section 113(b) at up to $124,426 per violation for penalties assessed on or after January 8, 2025.

Confirm your purchase route with your wholesaler in writing before the first cylinder ships.

Recovery duties apply across the board — old refrigerants and HFCs alike.

EPA's 2020 rule removed the old leak-repair section for appliances using only substitute refrigerants such as HFCs, but it kept the certification, sales restriction, evacuation, certified-recovery-equipment, safe-disposal and reclamation requirements for them; HFC leak repair later returned under a different rule, covered in the next section.

So your recovery equipment, evacuation practice and disposal handling are permanent obligations, whatever the refrigerant.

The equipment side has hard numbers.

For recovery equipment made on or after November 15, 1993, EPA's required evacuation levels are 0 inches of mercury vacuum for very-high-pressure appliances and for high-pressure appliances under 200 lb; 10 inches for high-pressure appliances 200 lb and over and medium-pressure appliances under 200 lb; 15 inches for medium-pressure appliances 200 lb and over; and 25 mm Hg absolute for low-pressure appliances.

Small appliances have their own targets: recover 90% of the refrigerant with the compressor working or 80% with it not working, or evacuate to 4 inches of mercury vacuum.

These are the numbers to spec recovery machines and vacuum pumps against, and to train new techs on.

The records side starts with the card.

Each certified technician must keep a copy of their certificate at their place of business and keep it until three years after they stop working as a technician — for a shop-based crew, that copy lives at your office.

EPA may also require a technician to demonstrate at the place of business that they can properly recover and recycle refrigerant, and may suspend or revoke a certificate for failing to do so or for breaking the Subpart F rules.

A revoked card takes a tech off refrigerant work, which makes certification status a staffing question as much as a compliance one.

Two handling rules complete the picture: venting HFC and other substitute refrigerants remains prohibited under Clean Air Act Section 608(c)(2), so recovered refrigerant goes into a cylinder, never into the air; and from January 1, 2028, anyone using a disposable refrigerant cylinder must send it for heel removal before discarding it — a small logistics line to add to your disposal routine.

There are two rulebooks, and the refrigerant decides which one applies.

Since EPA's 2020 rule, the leak-repair provisions of Subpart F apply only to appliances with a full charge of 50 or more pounds of a class I or class II refrigerant — the ozone-depleting CFC and HCFC refrigerants.

For those, the leak-rate thresholds that trigger repair are 20% for commercial refrigeration, 30% for industrial process refrigeration and 10% for comfort cooling and other appliances.

Owners must repair leaks above the threshold within 30 days — 120 days where an industrial process shutdown is needed — and a certified technician must perform the leak inspection.

Equipment that leaks 125% or more of its full charge in a calendar year must also be reported to EPA by March 1 of the following year.

The HFC book is newer.

Under the AIM Act's Emissions Reduction and Reclamation rule, leak repair applies from January 1, 2026 to appliances with a full charge of 15 or more pounds of HFC or a substitute refrigerant with a GWP above 53 — but residential and light-commercial air conditioners and heat pumps are excluded.

The thresholds mirror the old ones: 20% for commercial refrigeration, 30% for industrial process refrigeration, and 10% for comfort cooling, refrigerated transport and other appliances, with leak inspections performed by a 608-certified technician.

The largest systems add an equipment duty: commercial refrigeration and industrial process refrigeration appliances with a full charge of 1,500 lb or more must use automatic leak detection — installed at installation, or within 30 days, for equipment installed on or after January 1, 2026, and by January 1, 2027 for equipment installed in 2017 through 2025.

For your shop, the practical split is this: if your crews service supermarkets, cold storage or process refrigeration, the thresholds, inspection and reporting deadlines belong on a compliance calendar with each customer's charge size attached.

Residential and light-commercial split work sits outside the HFC leak-repair rule but inside every other Section 608 duty on this page.

Do not apply the 50-pound ozone-depleting thresholds to an HFC system or assume the residential exclusion covers a walk-in cooler — check which rulebook an appliance is under before you schedule the repair window, and confirm current thresholds with EPA, because these numbers have moved between rulemakings.

The equipment mix is changing under you.

Since January 1, 2025, new residential and light-commercial air conditioners and heat pumps — split systems and mini-splits, with VRF excluded — may not be installed with refrigerant of GWP 700 or more; the exception is systems whose specified components were all manufactured or imported before January 1, 2025, which may still be installed.

EPA's May 26, 2026 final rule removed the January 1, 2026 installation deadline that had applied to that pre-2025-component inventory — there is no installation deadline for it now.

Manufacture and import of self-contained products such as window and portable units with GWP 700 or more also stopped at January 1, 2025.

Existing systems may be serviced and repaired for their whole useful life, including component replacement, so R-410A service work continues.

The refrigerants replacing R-410A in new equipment are mostly R-454B, with a GWP of 465, and R-32, with a GWP of 675, against R-410A's 2,088 on EPA's reference table.

Both replacements are A2L refrigerants — the ASHRAE Standard 34 class that EPA's 2026 rule describes as lower toxicity paired with lower flammability.

Two employer consequences follow, and neither is a re-test.

First, no drop-ins: EPA says SNAP rules and industry standards prohibit putting flammable or mildly flammable refrigerants such as HFC-32 or R-454B into systems not designed for them.

An R-410A system cannot be topped off with an A2L product — a conversion is a system change, not a refrigerant swap, so brief your crews against "just refill it" requests.

Second, the training duty is a recommendation, not a new card.

EPA's SNAP use conditions for the new refrigerants say personnel who commission, maintain, repair, decommission or dispose of these appliances should obtain training and follow practices consistent with Annex HH of UL 60335-2-40.

The same use conditions confine the refrigerants to new equipment and specify meeting UL 60335-2-40 (third edition), charge limits tied to room size, and red-marked service ports — details your purchase orders and install checklists should pick up.

Recovery equipment needs to be designed for flammable refrigerants, and recovered flammable refrigerant from residential and light-commercial AC is likely hazardous waste under RCRA.

What does not change: your techs' 608 cards carry over.

EPA's AIM Act FAQ says technicians already certified under Section 608 or 609 do not need to be re-certified.

There is no separate A2L credential in federal rules; the A2L courses sold by ESCO, HVAC Excellence, NATE and manufacturers are voluntary.

What the transition actually asks of you is judgment: brief crews before A2L equipment enters your service mix, buy recovery equipment rated for flammable refrigerants, and ask your equipment manufacturers and your state or local mechanical code authority whether they set training requirements of their own — our research did not confirm which do, so check before you assume the SNAP recommendation is the whole duty.

Compliance is one slice of running the shop; the rest — sourcing, screening, pay and onboarding — is in our guide to hiring HVAC and plumbing techs.

This page is employer career and business information, not legal advice. EPA writes and enforces Section 608 and the AIM Act rules, and the figures here carry their rule dates — confirm current requirements with EPA before you set company policy around a threshold, a purchase rule or a training duty.