HVAC License Cert Prep Guide
EPA 608 Refrigerant Cert
$5.99 · Designed for iPad. Not verified for macOS.
Also Included In
Now with Universal prep — Core, Type I, II, and III in one app. Refrigeration cycle diagrams, timed exams, and a searchable 608 quick reference for study on the go.
Prepare for the EPA Section 608 Technician Certification Exam with a study tool built around the actual Core + Type I/II/III format. HVAC 608 Prep gives you a full-length practice exam for each section plus a Universal 100-question simulation, a topic-by-topic practice drill, clean refrigeration-cycle diagrams, and a searchable 608 reference you can flip through before a service call.
Everything in the app maps directly to the proctored 608 exam. The Core section covers ozone science, the Clean Air Act, Section 608 regulations, venting prohibitions, recovery/recycle/reclaim rules, safety, PPE, and cylinder handling. The three Type sections focus on small appliances (≤ 5 lb), high-pressure systems (R-410A, R-22, R-134a, R-404A, R-407C), and low-pressure centrifugal chillers (R-11, R-123).
WHAT YOU GET
Four section exams — Core, Type I, Type II, Type III — 25 questions each, 30-minute timer, 70% passing threshold (the EPA-required cut score).
Universal exam — 100-question full simulation drawn from every topic.
14 topic-based practice categories with easy → medium → hard progression inside each topic.
Over 140 exam-style multiple-choice questions with detailed explanations tied to 40 CFR Part 82 and common EPA-approved certifier manuals (ESCO, RSES, ICE, Mainstream Engineering).
Refrigeration-cycle, P-T chart, manifold gauge, superheat/subcool, P-h (Mollier), recovery hookup, recovery cylinder, centrifugal chiller, cascade, PPE, ASHRAE 34 safety class, and ozone/GWP diagrams drawn in native SwiftUI so they stay crisp at any size.
Case-based diagnostic scenarios — realistic split-system and refrigerator service problems with gauge readings to interpret.
608 Quick Reference tab — regulations, evacuation pressure table (40 CFR 82 Table 1), ODP/GWP chart, cylinder colors (AHRI Guideline N), refrigerant safety classes, oils/compatibility, recordkeeping rules. All searchable.
Exam Guide tab — what the test covers, eligibility, study plan, test-day tips, and links to certifying bodies.
Flag-and-review question navigator during the timed exam. Previous/Next, jump to any question, track answered vs. flagged vs. unanswered at a glance.
Performance analytics — per-topic accuracy and recent full-exam history persist across launches so you can see exactly which 608 domains still need work.
Full iPhone and iPad support, both portrait and landscape. Answer options lay out in two columns on iPad and iPhone Max landscape for faster scanning.
Clean, professional light theme with EPA-green accents. Offline-first — no internet connection required once the app is installed.
WHO IT'S FOR
HVAC and refrigeration technicians preparing for the proctored Section 608 exam with ESCO, RSES, ICE, Mainstream Engineering, Ferris State, HVAC Excellence, or another EPA-approved certifying organization. Also useful for apprentices studying before the hands-on portion, service managers brushing up for annual refreshers, and appliance-recycling operators who need the Type I credential before disposing of refrigerant-bearing equipment.
Disclaimer: This app is an independent study tool and is not affiliated with, endorsed by, or sponsored by the U.S. Environmental Protection Agency or any certifying organization. Passing practice exams here does not confer actual EPA Section 608 certification — that credential can only be issued by an EPA-approved certifying body after you pass their proctored exam.
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The developer, Yuhsiu Lai, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
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Information
- Seller
- Yuhsiu Lai
- Size
- 5.1 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 iTech Tools
