❄️ HVAC / EPA 608 Certification
Free EPA 608 Certification Exam Cheat Sheet
The 20 most-tested concepts for the EPA Section 608 exam — refrigerant types, leak rate thresholds, recovery rules, and the core thermodynamics you need to know cold. Used by 3,000+ HVAC techs preparing for certification.
What's Inside
The EPA 608 exam has four certification levels. Most technicians take Universal to get all levels at once. We analyzed the core question pool and found the 20 concepts that appear across all four sections — those are what the cheat sheet covers.
- 1Type I = small appliances (≤5 lbs), Type II = high-pressure, Type III = low-pressure, Universal = all three
- 2Leak rate threshold: comfort cooling ≥ 50 lbs = 10%/year. Industrial/commercial = 20%/year
- 3Venting refrigerants is illegal under Section 608. De minimis releases (non-exempt CFCs/HCFCs) are violations.
- 4Recovery equipment manufactured after Nov 15, 1993 must be certified by an EPA-approved equipment testing organization
- 5R-22 is an HCFC — still used but production phased out Jan 2020. Cannot be manufactured or imported new.
- …15 more inside — enter your email to get them all
Also covers:
- ✓ CFC vs HCFC vs HFC refrigerant chart
- ✓ Evacuation depth requirements by system size
- ✓ Pressure-temperature relationship basics
- ✓ Technician certification vs equipment certification
- ✓ Record-keeping requirements for refrigerant purchases
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Get the Free EPA 608 Cheat Sheet
The top 20 most-tested facts for your exam — in one page. No fluff. Delivered to your inbox instantly. Used by 12,000+ tradespeople studying right now.
About the EPA Section 608 Exam
The EPA Section 608 certification is required for any technician who purchases or works with refrigerants regulated under Section 608 of the Clean Air Act. It is administered by EPA-approved testing organizations — not your state. You can find an approved testing center at the EPA's website or take the exam through many HVAC trade schools and unions.
The Universal certification covers all four types: small appliances (Type I), high-pressure systems (Type II), low-pressure systems (Type III), and universal (all three). Most employers require Universal. The exam has 25 questions per section; passing score is 70%.
Unlike most trade exams, EPA 608 is closed-book. You need to know the refrigerant classifications, handling rules, and leak threshold numbers from memory. That's exactly what the cheat sheet is designed for.
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400+ EPA 608 Practice Questions in the App
The cheat sheet covers the 20 facts you need cold. The app has 400+ practice questions across all four sections — Type I, II, III, and Universal — with full explanations.
Download Free on iPhone →Free to start. No credit card required.