Apps / HVAC Prep
HVAC Prep
IndustrialLive on App StoreHVAC Prep is an iOS app for EPA 608 Universal certification exam prep — it includes 1,000+ EPA 608 practice questions covering Core, Type I, Type II, and Type III sections and a built-in refrigerant charge calculator, for $17.99 with lifetime access, no subscription, works offline.
iOS · Free to download · $17.99 one-time unlock
Everything You Need to Pass the EPA 608 Universal Exam
Refrigerant Charge Calculator
Refrigerant charge estimator for R-410A, R-22, R-32, and R-134a with GWP and ODP data
1,000+ Practice Questions
1,000+ EPA 608 questions across all 4 sections (Core, Type I, Type II, Type III)
Works Offline
Full offline access — works in the field, crawlspace, or on the rooftop without Wi-Fi
Progress Tracking
Per-topic progress tracking across all 4 EPA 608 exam sections
What’s on the HVAC Exam?
Topic weights are approximate. VoltExam’s question bank covers every topic area above.
How It Works
Step 01
Download Free
Free to download on the App Store — unlock everything once for $17.99.
Step 02
Practice Daily
Built-in calculators you'll use on the job — not just quizzes.
Step 03
Pass First Try
$17.99 once. No subscriptions. No recurring fees.
Pricing
VoltExam
$17.99one-time
- ✓ Pay once, use forever
- ✓ No monthly fees
- ✓ Full offline access
- ✓ All updates included
Competitors
$20+/month
- ✕ Subscription required
- ✕ Lose access if you cancel
- ✕ Often requires Wi-Fi
- ✕ $240+ per year
HVAC Techs Who Passed EPA 608 Universal on the First Try
“Cleared EPA 608 Universal in two weeks of studying. The refrigerant charge calculator is super easy to use.”
— Carlos M., HVAC Tech, Florida
“The pressure-temp charts alone are worth the download. Passed in two weeks and I had zero background.”
— Derek W., HVAC Tech, Georgia
Frequently Asked Questions
How many questions are on the EPA 608 exam?
The EPA 608 exam has two sections: a Core section (25 questions) and a type-specific section (25 questions — Type I, II, III, or all three for Universal). You need 70% on each section to pass. A Universal score means you answered all four sections at 70%+.
What refrigerants are covered on the EPA 608 exam?
The EPA 608 exam covers R-22 (HCFC), R-410A, R-32, and R-134a, including each refrigerant's ODP (ozone depletion potential) and GWP (global warming potential). You also need to know the Section 608 venting prohibition and the phase-out of R-22 production, which ended January 1, 2020.
Can I take the EPA 608 exam online?
Yes — the EPA 608 exam can be taken online through approved certifying organizations including ESCO Institute, NATE, Mainstream Engineering, and HVAC Excellence. Some offer proctored online exams you can complete from home.
Do I need EPA 608 certification to work on HVAC equipment?
Yes. Section 608 of the Clean Air Act requires EPA certification for any technician who purchases or handles refrigerants. Type I covers small appliances, Type II covers high-pressure systems, Type III covers low-pressure systems, and Universal covers all three.
