HVAC Prep: EPA 608 Exam 2026
Pass All 4 Sections First Try
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Updated for 2026 EPA regulations. Pass Promise: study and don't pass? Full refund. 1,000+ questions across Core, Type I, II, III. Refrigerant calculator included.
The EPA 608 exam has four sections — Core, Type I, Type II, and Type III. You need to pass all four to get your Universal certification. Most technicians study one section at a time and still fail because they don't know where they're weak until it's too late.
HVAC Prep tracks your score separately for each section. You'll see exactly which section needs work before you walk into the testing center. Red means study more. Green means you're ready. No guessing.
The Refrigerant Charge Calculator covers R-410A, R-22, R-32, R-134a, R-404A, and R-407C with ODP values, GWP ratings, operating pressures, and phase-out status. These numbers show up on the Core section every single time — and most technicians memorize them wrong.
Pressure-Temperature Charts give you instant P/T lookups for every common refrigerant. Enter a pressure, get the saturation temperature. Enter a temperature, get the pressure. This is the reference tool you'll keep using on every service call long after you pass the exam.
1,000+ practice questions written to match the EPA 608 exam blueprint. Every question tells you which section it covers, explains why the correct answer is right AND why your wrong answer was wrong, and cites the specific EPA regulation. This isn't random trivia — it's the exact material the exam tests.
Full mock exam simulates real test conditions: 25 questions per section, timed, no peeking at explanations until you finish. See your pass/fail result for each section separately — just like the real exam scores it.
Smart practice never shows you questions you've already mastered. The app tracks every question you've seen, which ones you got right, and which ones keep tripping you up. It feeds you the questions you need, not the ones you've already nailed.
VoltExam Pass Promise: Study for 30+ days, complete 80% of questions with a 75%+ average, take at least 1 mock exam. If you don't pass your EPA 608 certification, we'll refund you. No other HVAC exam app offers this.
EXAM SECTIONS COVERED:
Core — ozone depletion, Clean Air Act, refrigerant safety, recovery requirements, leak detection, record keeping, sales restrictions, penalties
Type I — small appliances (5 lbs or less), passive recovery, system-dependent recovery
Type II — high-pressure systems, evacuation levels, recovery equipment, leak repair requirements for systems with 50+ lbs
Type III — low-pressure systems, chillers, purge units, pressurization for leak testing, deep vacuum requirements
Universal — all four sections combined
PRO — LIFETIME ACCESS: Unlimited questions across all four sections, full mock exam, complete refrigerant calculator, P/T charts, smart weak-area practice, Pass Promise coverage.
No subscriptions. One payment. Yours forever.
Download now. Get your Universal certification on the first try.
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Version 2.0 — Major Update
Smarter Study System
- Smart practice tracks every question — never repeats what you've mastered
- Exam Readiness Score shows your pass probability for each section
- Daily free question tracker with visual indicators
Pass Promise
- New VoltExam Pass Promise — study seriously and don't pass? Full refund
- Qualification tracker in Settings shows your progress toward coverage
Pro Upgrade Reimagined
- New paywall with clear feature comparison
- Lifetime $17.99 or Monthly $6.99
- One-tap purchase restore
Performance
- Faster launch, smoother navigation
- Optimized for iOS 18
- Reduced app size
The developer, Deeun Inc., 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Deeun Inc.
- Size
- 4.7 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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+
- In-App Purchases
Yes
- HVAC Prep Pro Monthly $9.99
- Pro — Lifetime Access $24.99
- Copyright
- © 2026 Deeun Inc.