Does EPA 608 certification expire?

No, EPA 608 certifications do not expire. According to the United States Environmental Protection Agency (EPA) website, "Section 608 Technician Certification credentials do not expire." This means that after completing the licensing exam, technicians who service heating and air conditioning do not need to be re-certified at specified time intervals. There are four types of certification available: small appliances (type 1), high-pressure appliances (type 2), low-pressure appliances (type 3), and all types of equipment (universal). Each of these certifications requires a slightly different exam, with a mixture of core topics (Environmental Impacts, Substitute Refrigerants and Oils, and Recovery Techniques, to name a few) and information that is specific to the requirements and techniques involved in the specific appliances of certification. For more information on the certification requirements for heating and air conditioning workers, check out this article.