EPA 608 guide
Type I, II, III or Universal — which 608 do you need?
The four EPA 608 certifications map to equipment classes, not to job titles. Pick the ones that match the equipment you actually touch; most field technicians end up with Universal because they move between systems.
Type I — small appliances
Covers appliances with a charge of five pounds or less of refrigerant, and hermetically sealed systems such as household refrigerators, freezers, window air conditioners and dehumidifiers. Recovery requirements for these systems are efficiency-based: 90% when the compressor is running, 80% when it is not.
Type II — high-pressure equipment
The type most HVAC service technicians need: split systems, heat pumps, packaged units and commercial refrigeration running high-pressure refrigerants. Recovery here is governed by evacuation levels rather than a straight percentage.
Type III — low-pressure equipment
Covers low-pressure systems such as centrifugal chillers that use refrigerants like R-123. The recovery targets and safety considerations are different enough that Type II knowledge does not substitute.
Universal
Universal is Core plus Type I, II and III passed as one credential. It is the most flexible and the one employers tend to ask for, because it means you can be sent to any system. You pass each section separately, then hold the combined certification.
Frequently asked
- Can I take just Type II?
- Yes. You can sit Core plus any single type. Many residential service techs start with Core + Type II and add Universal later. Certification does not expire, so adding types later is straightforward.
- Does a 609 certification replace 608?
- No. Section 609 covers motor-vehicle air conditioning only. Stationary refrigeration and HVAC work needs 608; the two are separate credentials.
Test yourself on Core and all three types →
30 mixed questions, same 70% bar, instant category breakdown.
Test yourself on Core and all three types →