How to Get EPA 608 Certified for HVAC Work
Northlight Publishing · Updated September 2026
If you work on equipment containing refrigerant, federal law requires EPA Section 608 certification. It is not optional, it does not expire, and supply houses will not sell you refrigerant without it. Here is how the certification works and how to get it efficiently.
The four certification types
Core is the foundation exam everyone takes, covering ozone depletion, the Clean Air Act, safety, and general refrigerant handling. Type I covers small appliances with 5 pounds or less of refrigerant, such as window units and domestic refrigerators. Type II covers high-pressure systems, which is most residential and commercial HVAC work. Type III covers low-pressure systems, mainly chillers. Pass Core plus all three types and you hold Universal certification, which is what most technicians should aim for, since it removes any question about what you are allowed to service.
How the exam works
Each section is 25 multiple-choice questions and you need 18 correct, which is 72 percent. Core and at least one type must be passed with a proctor for Type II, III, and Universal. Testing is available through HVAC trade organizations, supply houses, and online proctored providers, and many trade schools administer it at the end of their programs. There is no experience requirement: you can test before your first HVAC job, and having the card makes you more hirable.
What changed in the rules
The exam has been updated to reflect the industry's shift away from high-GWP refrigerants, and older study materials miss it. The AIM Act's HFC phasedown is well underway, A2L refrigerants such as R-454B and R-32 are now standard in new residential equipment, the 2025 sales restriction changed what equipment can be sold, and new leak repair rules took effect in January 2026. Expect questions on all of it, including the mildly flammable A2L safety classification and handling requirements.
How to study
The exam rewards memorized specifics: evacuation levels in inches of mercury for each appliance type, leak rate thresholds that trigger repair requirements, recovery requirements, and dates. Build your study plan around drilling those numbers, then layer practice exams on top until you consistently score above 20 per section.
The EPA 608 Study Guide 2026-2027 covers Core and all three types chapter by chapter, includes 130 review questions plus two complete 100-question practice exam sets with explained answers, and is fully current through the 2026 rule changes, including A2Ls and the new leak repair requirements. It also includes five-evening and three-week study plans depending on how fast you need the card.
After you pass
Your certification never expires, but keep a copy of the card in your wallet and a photo on your phone, because wholesalers ask. If you fail a section, you only retake that section, so a bad day on Type III does not erase your Core pass.