EPA-608 HVAC TruePrep AI Tutor

LineCentury, Inc.

In-app purchases

About this app

Pass the EPA 608 certification exam — Core, Type I, Type II, Type III and Universal — and keep studying HVAC after you pass.

EPA-608 HVAC TruePrep is an EPA 608 practice test app and HVAC exam prep course in one. It is built for technicians sitting the EPA Section 608 certification exam, for HVAC school students, and for apprentices working toward an HVAC certification. Everything works offline once downloaded.

UPDATED FOR THE 2026 REFRIGERANT RULES
Most EPA 608 study material has not caught up with the current rules. This one has:
• The AIM Act HFC phasedown and the allowance system
• Technology Transitions GWP limits by equipment type
• The leak-repair requirements effective January 1, 2026
• A2L refrigerants — R-32, R-454B, R-1234yf — with the new cylinder and gauge colors, sensor and ventilation rules
• The Refrigerant Management Rule for recovery, recordkeeping and cylinder handling

EPA 608 PRACTICE TESTS
• 1,738 practice questions and 1,386 review questions, every one with a written explanation
• Practice by EPA 608 section — Core, Type I, Type II, Type III — or mix all four
• Marathon mode: 447 questions in one continuous run
• Unlimited retakes, with your weak topics tracked as you go

EPA 608 EXAM SIMULATOR
Sit one EPA 608 section at a time: 25 questions, 18 correct to pass, timed, scored the way the real EPA 608 certification exam is scored. Or take the mixed final covering all four sections. Every attempt is scored per section, so you can see which one is holding your Universal certification back.

HVAC COURSE, NOT JUST EXAM PREP
• 121 HVAC lessons with 421 diagrams
• Electrical Fundamentals & Controls — meters, motors, capacitors, contactors, wiring diagrams and troubleshooting
• Refrigeration Cycle, Charging & Diagnosis — superheat, subcooling, airflow and system faults, with worked calculations
• Written for HVAC/R technicians and HVAC school students who want to understand the trade, not memorize an answer key

P-T CHART AND CHARGING CALCULATOR
Saturation pressures and temperatures for 11 refrigerants, plus superheat and subcooling calculators. It works offline — on a roof, in a crawlspace, with no signal.

AI HVAC TUTOR
Ask about any lesson or any practice question and get an explanation written for a technician, not a textbook. Ask it to work an example, restate an EPA rule, or explain why the other three answers are wrong.

PROGRESS TAB
Exam readiness for every EPA 608 section and every HVAC unit, so you know what to study next instead of guessing.

WHO USES IT
• Technicians taking the EPA 608 certification exam for the first time
• Technicians adding a Type, or going for Universal certification
• HVAC school students, apprentices and HVAC/R trainees
• Working techs who need to know what changed in the 2026 refrigerant rules

ABOUT THE SUBSCRIPTION
TruePrep HVAC AI Plus unlocks the full HVAC course and every EPA 608 practice test for the duration of your subscription. Subscriptions are billed to your Google Play account and renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in Google Play > Subscriptions. Prices may change with notice; promotional offers may be available for qualifying purchases during specific periods.

Privacy Policy: https://www.trueprepai.net/privacy-policy
Terms of Use: https://www.trueprepai.net/terms-of-service
Contact us: [e-mail]

EPA-608 HVAC TruePrep is an independent study app. It is not affiliated with, endorsed by, or sponsored by the U.S. Environmental Protection Agency or any certifying organization.

Ratings and reviews

I was hopeful that I could listen to the Questions instead of me reading it because of my dyslexia. It makes it really hard to understand.

Quality app with so many useful information to help you pass your HVAC exam.

awesome 👌

What’s new

Navigation fixes:
- Tapping a tab now makes it the only screen open, so Back closes the app instead of jumping to a previous tab.
- After switching courses, Back from a lesson returns to the Road Map instead of the course picker.