Plenty of Section 608 exam questions were written around R-22 systems. The field has moved on to R-32 and R-454B, and the exam is catching up. For only the second time since it was introduced more than 30 years ago, EPA is significantly updating the Section 608 Technician Certification exam, according to ACHR News. Existing certifications stay valid, and nobody who already holds a card has to retest. Anyone not yet certified, though, including apprentices, new hires and techs planning to add Type I or Type III, will face a different test starting Jan. 1, 2027.
One note on sourcing: as of Oct. 1, 2026, EPA’s public Section 608 pages haven’t posted a notice on the new question bank. The exam details below come from ACHR News coverage of an ESCO Institute webinar, so confirm specifics with the certifying organization before scheduling a test.
What’s Changing and What Isn’t
Jason Obrzut, director of industry standards and relations at ESCO Institute, outlined the revisions in an ESCO webinar and called the update a quality-of-life fix. EPA and the approved certifying organizations spent roughly a year on the revision and pilot-tested the new questions in the first quarter of 2026. The basic framework holds steady:
| Exam Element | Before the Revision | After the Revision |
|---|---|---|
| Exam sections | Core, Type I, Type II, Type III | Same four sections; no new Type IV for A2Ls |
| Universal certification | Pass all four sections | Unchanged |
| Question bank | Includes legacy references such as R-22 systems | About 400 questions; obsolete items removed, newer refrigerants such as R-32 and R-454B added |
| Refrigerant classes | Ozone-depleting refrigerants and substitutes | Adds general A2L and A3 knowledge, including R-32, R-454B, R-1234yf and hydrocarbons |
| AIM Act regulations | Not covered | Still not covered |
| Format | Closed-book, proctored | Closed-book, proctored; 10 exam versions |
| Existing cards | Valid | Still valid; no retest required |
| Old question bank | In use | No longer accepted as of Jan. 1, 2027 |
The AIM Act exclusion surprises people. Section 608 comes from the Clean Air Act, while the AIM Act is separate legislation governing HFCs, so HFC leak-rate rules under the AIM Act won’t show up on the test. Candidates still need the leak rates that apply to CFCs and HCFCs.
The Transition Window Is the Real Trap
Both the current and revised exams may be offered through the rest of 2026. Here’s the catch: a candidate can study from material built for one version and sit for the other. Obrzut warned that free review content on video sites and forums now spans multiple generations of the exam, and ESCO is updating its own study guide and online materials.
Partial certifications carry over. A tech holding Type II can add the remaining sections later, but anything taken on or after Jan. 1 comes from the revised bank.
A2L Questions Reflect A2L Jobs
The new exam adds A2L content because the equipment’s already on the trucks. Code bodies are moving the same direction. The 2027 Uniform Mechanical Code aligns its A2L provisions with the latest ASHRAE Standard 15, and the 2027 International Mechanical Code updates refrigerant classifications and occupational exposure limits, per Contractor Magazine.
The test covers general knowledge. The field demands the right gear. Here’s what an A2L-ready recovery and evacuation kit looks like:
| Task | What to Look For | Examples on SupplyHouse |
|---|---|---|
| Recovery | Ignition-proof or A2L-certified design | CPS TRS21, Navac NR7, Inficon Vortex Dual |
| Leak detection | Sensor rated for A2L refrigerants | Fieldpiece DR82 |
| Evacuation | Two-stage pump plus a dedicated micron gauge | Navac NP7DP, AccuTools BluVac Micro |
| Cylinder connections | Left-hand thread adapter for A2L cylinders | Navac F2010 |
| Weighing | Scale with a programmable alarm | Fieldpiece SRS1 |
The CPS TRS21 is built to ANSI ignition-proof standards and rated for A1, A2, A2L and A3 refrigerants. The Navac NR7 lists R-32 and R-454B compatibility and runs on a brushless DC motor, and the Inficon Vortex Dual runs a 1 HP dual-piston compressor and is confirmed A2L certified in the product Q&A. For leak checks, the Fieldpiece DR82 infrared detector handles A1 and A2L refrigerants.
On the vacuum side, the Navac NP7DP moves 7 CFM with a 15-micron ultimate vacuum, and a BluVac Micro gauge reads 0 to 25,000 microns over Bluetooth, with 1-micron resolution below 1,000 microns. A Navac F2010 adapter handles the left-hand thread on R-32 and R-454B cylinders, and the Fieldpiece SRS1 scale brings 0.25 oz resolution and an alarm for charging or recovery. The full HVAC tools category and the vacuum pumps lineup round out the kit.
Recovery Matters More Than Ever
Obrzut flagged a number every shop owner should know: only about 3% to 6% of refrigerant used each year makes it back to reclamation. As the HFC phasedown tightens supply, reclaimed refrigerant will have to carry much of the service load for legacy systems.
EPA’s Refrigerant Management Program still governs the basics, and several requirements reach beyond the old ozone-depleting refrigerants:
- Technician certification, the venting prohibition and refrigerant sales restrictions also apply to HFCs and HFOs.
- Section 608 leak repair requirements don’t apply to HFCs and HFOs the same way, but recovery and other handling requirements do.
- Contractors must keep required refrigerant records for three years.
A Shop Owner’s Action Plan Before Jan. 1, 2027
- Audit the crew. Record who holds which certification type and keep copies of every card on file.
- Schedule uncertified techs now, and confirm with the testing organization which question bank the exam will use.
- Replace outdated study guides. Date-stamp printed material and pull links to old online review content from training folders.
- Map partial certifications. Techs planning to go Universal should know any section taken on or after Jan. 1 comes from the new bank.
- Inventory A2L-capable tools: recovery machines, leak detectors, cylinder adapters and scales.
- Tighten recordkeeping so refrigerant records can be produced for the full three-year retention period.
- Train past the test. Obrzut was blunt that Section 608 certifies regulatory knowledge, not technical competency, so hands-on A2L training still matters.
Frequently Asked Questions
Do techs who already hold Section 608 certification need to retest?
No. Existing cards remain valid, and there’s no federal requirement to retake the exam.
When does the old Section 608 exam go away?
Per ACHR News, exams built from the previous question bank will no longer be accepted on Jan. 1, 2027. Both versions may be available until then.
Is there a new certification type for A2L refrigerants?
No. The exam keeps Core, Type I, Type II and Type III. A2L and A3 content is folded into the revised question bank.
Will the new exam cover AIM Act rules?
No. The AIM Act is separate legislation governing HFCs. Section 608 comes from the Clean Air Act, so AIM Act regulatory requirements stay off the test.
How big is the new question bank?
Roughly 400 questions across the four sections. Test providers will build 10 versions so candidates sitting side by side don’t get identical exams.
Can a Type II tech add Type I or Type III later?
Yes. Earned sections carry over, but any section taken on or after Jan. 1, 2027 comes from the revised bank.
Does passing Section 608 make someone a qualified HVAC technician?
No. It’s a regulatory and environmental exam that certifies knowledge of refrigerant rules, not hands-on service skill.
Does the venting prohibition apply to HFOs?
Yes. Under EPA’s Refrigerant Management Program, the venting prohibition, technician certification and sales restrictions also apply to HFCs and HFOs.
How long do refrigerant records have to be kept?
Required Section 608 records must be kept for three years.
Testing, Testing, 608
EPA’s rewrite of the Section 608 question bank won’t touch the cards already in circulation, but it changes the on-ramp for every new tech entering the trade. The cutoff is Jan. 1, 2027, and the biggest risk between now and then is someone studying for the wrong version. The new A2L and A3 content mirrors what crews already handle on R-32 and R-454B equipment, and the 2027 UMC and IMC are moving the same way. Recovery isn’t a checkbox, either, with reclamation rates still in the single digits. Shops that update training materials, line up A2L-ready tools and tighten records now will pass the test that actually matters, the one in the field.
