Breadcrumb Home Air Conditioning/Refrigeration ACR 147 ACR 147: Refrigerant Transition and Recovery Theory Download as PDF Program Air Conditioning/Refrigeration Credits 3 Lecture Hours 3 Lab Hours 0 This course is EPA-approved and covers material relating to the requirements necessary for type I, II, and III universal certification. Upon completion, students should be prepared to take the EPA 608 certification examination.