Master the EPA 608 refrigerant exam.
Structured lessons, hundreds of practice questions, and full exam simulations for Core, Type I, II, and III — built for working technicians.
Plain-English Lessons
Every lesson includes key terms, technician examples, safety warnings, and field scenarios.
Realistic Quizzes
Immediate feedback, explanations, randomized order, and a 70% practice passing score.
Certificate of Completion
Finish your prep and download a certificate of completion for your records.
Five certification tracks
Work through each section at your own pace. Universal Prep combines all four.
EPA 608 Core
Clean Air Act foundations every technician must know
Type I - Small Appliances
Factory-sealed systems with 5 lbs or less of refrigerant
Type II - High-Pressure Appliances
Residential and commercial high-pressure systems
Type III - Low-Pressure Appliances
Low-pressure chillers and centrifugal systems
Universal Prep
Core + Type I + Type II + Type III combined
Ready to start your prep?
Try the first Core lesson and 10 sample questions free — no card required.