Under section 608, EPA has established four types of certification for technicians who service and repair appliances. These technicians must be certified by passing a test in the appropriate area. All training and review classes for section 608 are voluntary; only passing the test is mandatory. The four categories of certification are:
• Type I = small appliances
• Type II = high-pressure appliances, except small appliances and MVACs
• Type III = low-pressure appliances
• Type IV (Universal) = all appliances
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