EPA 608 Certification Exam : Step by Step Passing the Epa 608 Certification Exam, Paperback by Benetti, H., ISBN 1497384346, ISBN-13 9781497384347, Brand New, Free shipping in the US A guide to passing the EPA 608 refrigeration exam, including the Core, Type I, Type II, Type III, and universal exams. Also includes practice questions that have been known to be on the test. Setup to be a guide to help HVAC technicians or anyone who needs to pass the EPA 608 refrigeration exam.