• Type I - A Type I technician primarily works on small appliances such as domestic refrigerators, window air conditioners,
PTAC's and vending machines.
• Type II – A Type II technician primarily works on equipment using high-pressure refrigerant such as HCFC-22. The equipment
includes residential air conditioners and heat pumps, supermarket refrigeration and process refrigeration.
• Type III - A Type III technician primarily works on equipment using a low-pressure refrigerant such as HCFC-123 or CFC-11.
The units are primarily chillers.
• Universal - Any candidate passing all three of these EPA types Type I, Type II or Type III is certified as UNIVERSAL.
The test is divided into four sections, CORE, Type I, Type II and Type III. Each test section has 25 multiple-choice questions
drawn from a pool of test questions provided by the EPA. Questions regarding equipment regulations, safety, shipping and
identifying refrigerants appear in every test section, so it is important to know these well. Multiple versions of the test
are offered at the same time offering different questions.
A passing score of 70%, or 18 out of 25 correct, is required in order to be certified. For Type I certification tests using
the mail-in or online format, passing score is 84%. Each section is graded independently, so a technician could pass CORE,
Type I and Type III and fail Type II. In this case the technician would be certified as a Type I & Type III technician. CORE
must be passed to receive any certification. All sections must be passed in order to achieve Universal Technician status
A technician may choose to take CORE plus any combination of Type I, Type II or Type III. It is not required to take all four
sections on the examination, however, much of the content from section to section relates back to CORE content, so once the
CORE content is mastered, reviewing for the other sections is much easier.