Free EPA 608 Universal Certification Study Guide 2025-2026
Welcome to Mike’s A/C LLC’s free interactive EPA 608 study guide — the most complete EPA 608 Universal Certification study guide available online for 2025-2026. Whether you are brand new to HVAC or a working technician brushing up on the latest regulations, this free EPA 608 study guide covers everything you need to pass on your first try.
What Is the EPA 608 Study Guide?
This EPA 608 study guide covers all four sections of the Universal certification exam — Core, Type I, Type II, and Type III. Each section includes detailed study material, key facts, memory tips, and practice questions that mirror the real exam. The EPA 608 study guide is updated for 2025-2026 and includes the latest AIM Act regulations, R-454B, and R-32 A2L refrigerant content.
What Does the EPA 608 Study Guide Include?
Complete Core section — Clean Air Act, ODP, GWP, recovery, recycling, and reclamation
Type I — Small appliances, factory-sealed systems, recovery methods
Type II — High-pressure systems, R-410A, R-454B, R-32, leak rate thresholds
Type III — Low-pressure centrifugal chillers, R-123, purge units
Full A2L refrigerant section — R-32 and R-454B safety, handling, and exam questions
5 full-length 100-question timed practice exams
60 plus flashcards across all sections
Complete refrigerant reference charts and pressure-temperature tables
Searchable glossary of every key term
R-32 and R-454B — New for 2025-2026 EPA 608 Exam
As of January 1, 2025, R-410A is banned in new residential HVAC equipment under the AIM Act. This EPA 608 study guide includes a dedicated section covering R-32 and R-454B — the A2L refrigerants now used in all new systems. Learn the critical differences, safety handling procedures, charge methods, and oil requirements that are now tested on every EPA 608 exam.
Who Needs the EPA 608 Certification?
Anyone who purchases, handles, or services refrigerant-containing equipment is required by federal law under Section 608 of the Clean Air Act to hold EPA 608 certification. This includes HVAC technicians, maintenance workers, equipment installers, and contractors. Violations carry civil penalties of up to $44,539 per day per violation.
How to Use This EPA 608 Study Guide
Start with the Core section since it is required for all certification types. Then work through Type I, Type II, and Type III. Use the flashcards to review key terms, take the practice exams under timed conditions, and check your scores on each section. You need 72 percent on each section to pass the Universal certification exam.
About Mike’s A/C LLC
Mike’s A/C LLC is a licensed HVAC Service provider serving Angie, Bogalusa, Bush, Franklinton Poplarville and Sandy Hook. With over 30 years of experience, we are committed to helping the next generation of HVAC technicians get certified and succeed in the field. Visit us on