EPA 608 Type Picker
Check every kind of equipment you work on (or will). Type definitions come from 40 CFR 82.161 and 82.152.
Confirm requirements with EPA and your certifying organization.
Pressure classes (40 CFR 82.152)
| Class | Liquid-phase saturation pressure at 104 °F | Examples in the rule | 608 Type |
|---|---|---|---|
| Low | below 45 psia | R-11, R-123, R-113, R-245fa | III |
| Medium | 45 to 170 psia | R-114, R-124, R-12, R-134a, R-500 | II |
| High | 170 to 355 psia | R-22, R-407A, R-407C, R-410A, R-502 | II |
| Very high | critical temp below 104 °F, or above 355 psia | R-13, R-23, R-503, R-508A, R-508B | II |
Where to test and practice
- EPA: approved Section 608 certifying programs (EPA doesn't issue cards; the program does).
- ESCO Institute: free 608 practice exams (Core, Type I, II and III; practice only, not the real test questions).
- EPA: 608 test topics
Common questions
What does each 608 Type cover?
Type I: small appliances. Type II: medium-, high- and very high-pressure appliances (except small appliances and MVACs). Type III: low-pressure appliances. Universal: all three (40 CFR 82.161(a)(1)).
Does Section 608 certification expire?
No. EPA says Section 608 technician certification credentials do not expire.
What score do I need?
70 percent on closed-book Type I, II, III and Universal tests, and 84 percent on mail-in Type I tests (40 CFR Part 82, Subpart F, Appendix D).
Sources
- 40 CFR 82.161 · 82.152 · Subpart F, Appendix D (eCFR, current to Oct 15, 2026)
- EPA: Section 608 Technician Certification Requirements · EPA: Section 608 Technician Certification
Last verified Oct 18, 2026. Reference only.