Which certification fits
EPA 608 vs 609: which one covers your work?
EPA 608 certification covers stationary refrigeration and air conditioning, from window units to chillers; EPA 609 covers air conditioning in motor vehicles serviced for pay. The two overlap in one place, MVAC-like equipment such as the cab AC on tractors and excavators, where either a 608 Type II or a 609 certification qualifies you.
Side by side
EPA Section 608 compared with EPA Section 609
| Item | EPA 608 | EPA 609 |
|---|---|---|
| Legal basis | Clean Air Act Section 608; 40 CFR Part 82, Subpart F | Clean Air Act Section 609; 40 CFR Part 82, Subpart B |
| Equipment covered | Stationary appliances: refrigerators, residential and commercial AC, commercial refrigeration, chillers | Motor-vehicle air conditioning serviced "for consideration" (for pay or barter) |
| MVAC-like equipment (off-road vehicle cabs) | Type II qualifies | Qualifies |
| Levels | Type I, Type II, Type III, Universal | No Type I/II/III split; training plus a test from an approved 609 program |
| How you earn it | Proctored test from an EPA-approved program: Core plus one or more type sections, 70% to pass (closed-book) | Training plus a test from an EPA-approved 609 program |
| Renewal | None; credentials don't expire under current EPA rules | Not stated on EPA's 609 program page |
Yellow edge: the two columns say different things on this row.
Sources: 40 CFR 82 Subpart F (eCFR as of October 5, 2026); EPA Section 609 technician training and certification programs (checked October 7, 2026).
Who needs which
The line between the two is mostly the equipment; the refrigerant matters only at the edge, where MVAC-like systems on R-22 fall outside the overlap (below). A common mix-up is to treat 609 as a beginner level of 608. They are separate programs under separate sections of the Clean Air Act, and each one stops at its own boundary.
Shops that service both a customer's heat pump and the customer's pickup end up holding both cards. Neither test covers the other's equipment, and each comes from its own list of EPA-approved programs: the 608 programs and the 609 programs.
You need 608 if
you install, service, repair or dispose of stationary equipment in a way that could release refrigerant: attaching gauges, recovering, charging, replacing components on the circuit. Which type depends on the equipment; the EPA 608 certification types page sorts it out. Rules behind the exam's Core section, including the venting prohibition, are on the Clean Air Act and Montreal Protocol study page.
You need 609 if
you work on car, truck or bus air conditioning for pay. A 608 card doesn't stretch to a passenger car, and a 609 card doesn't stretch to a rooftop unit.
Either works if
the job is MVAC-like equipment, the narrow category defined below. A technician who holds 608 Type II for stationary work can service a tractor cab without adding 609.
Disposal is its own case: the rule doesn't require certification for people who dispose of small appliances or motor vehicles, though the safe-disposal and recovery requirements still apply to the refrigerant inside (40 CFR 82.161(a)(1)(vii), eCFR as of October 5, 2026).
Match the job to the card
- Household refrigerator, window AC, dehumidifier, factory-sealed with 5 lb or less: 608 Type I.
- Residential split system, heat pump, rooftop unit, walk-in cooler: 608 Type II.
- Low-pressure centrifugal chiller: 608 Type III.
- Car or pickup AC repaired for a customer: 609.
- Tractor, combine or excavator cab AC (MVAC-like): 608 Type II or 609.
- Several of the above: 608 Universal for the stationary work, plus 609 if vehicles are in the mix.
Where the two cards meet
Can I hold both certifications?
Yes. They are earned separately from programs on each EPA list, and nothing in the rules stops one technician from holding both.
Do I need 609 certification to buy R-134a for my own car?
Not for small cans: containers of 2 lb or less with a self-sealing valve, meant for motor-vehicle AC, are exempt from the sales restriction (40 CFR 82.154(c), eCFR as of October 5, 2026). Larger containers are sold only to certified technicians.
Does 609 let me buy refrigerant for home AC?
The sales restriction limits refrigerant sales to certified technicians; the exception for the public is the motor-vehicle can of 2 lb or less (40 CFR 82.154(c), eCFR as of October 5, 2026). For stationary systems, the certification that covers the work is 608.
Is a small appliance the same thing as MVAC-like equipment?
No. A small appliance is a factory-sealed stationary unit with 5 lb of refrigerant or less (Type I); the small-appliance definition page covers it. MVAC-like equipment is off-road vehicle cab cooling up to 20 lb.