Apps / HVAC Prep
HVAC Prep
IndustrialLive on App StoreHVAC Prep is an iOS and Android app with 1,000+ native-app practice questions across EPA 608 Core, Type I, Type II, and Type III topics, plus refrigerant tools and offline study. The separate web bank contains 550+ questions. Native and web purchases are separate; check each destination for current terms.
Available on iPhone and Android · Free to download · optional in-app purchases; check your store for current local terms
Certification and source checkpoint
Which EPA 608 certification route are you preparing for?
Choose Type I, Type II, Type III, Universal, or Not sure yet before practice. This choice is additive and does not replace lesson, flashcard, test, Pathway, weak-area, missed-question, score, or exam-date progress.
Zero-admission boundary
EPA-aligned admissions: 0 / 647 — 552 distinct paid prompts, 5 lessons, and 90 flashcards remain supplemental until every asset has complete provenance, explanation, ownership, security, and human-review records.
Official-source boundary
Practice is not EPA certification
EPA requires an approved test from an approved certifying organization. The closed-book path uses 25 Core questions plus 25 questions for each relevant Type, with 70% required per section; Universal covers all 100 questions. VoltExam is independent supplemental practice and does not administer the official test, issue certification, or predict an official result.
EPA requirements, test standard and approved-program list rechecked 2026-10-23; native store offer terms rechecked for this page on 2026-10-23.
EPA 608 Practice, Kept Separate From Certification
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+ native-app practice questions across Core, Type I, Type II, and Type III topics
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?
These are EPA's certification sections, not estimated topic weights. Use the current federal standard and your approved certifying organization's instructions for the official test.
How It Works
Step 01
Download Free
Free to download on iPhone and Android. Optional purchases use the terms shown in your store.
Step 02
Practice Daily
Built-in calculators you'll use on the job — not just quizzes.
Step 03
Unlock Full Practice
Choose only from the purchase options and terms displayed by your app store.
Native app purchase options
Apple App Store
The public US listing currently shows monthly, annual, and lifetime in-app purchase options. Open the App Store for the current price, trial eligibility, renewal terms, and availability shown for your region and account.
Google Play
Google Play lists the app as free to install with in-app purchases. Review the purchase terms and final local price in Google Play before confirming.
Native app purchases are separate from VoltExam web access. The native app lists 1,000+ questions; the separate web practice bank currently contains 550+ questions.
Frequently Asked Questions
How many questions are on the EPA 608 exam?
EPA's test standard requires at least 25 Core questions and at least 25 questions from each relevant technical group. Universal covers Core plus Type I, Type II, and Type III. The closed-book passing score is 70% for each section.
Does VoltExam issue EPA 608 certification?
No. VoltExam is an independent practice product. EPA requires the official test to be administered by an EPA-approved certifying organization; only that testing path can issue Section 608 certification.
Can I take the EPA 608 exam online?
Some EPA-approved certifying organizations offer remote or online testing. Format and proctoring depend on the organization. EPA says an open-book Core test cannot count toward Universal certification; the Core test must be proctored for Universal.
Do I need EPA 608 certification to work on HVAC equipment?
EPA requires certification for technicians whose maintenance, service, repair, or disposal work could release refrigerant. Type I covers small appliances, Type II covers high- and very-high-pressure appliances, Type III covers low-pressure appliances, and Universal covers all types. EPA also identifies a supervised registered-apprentice exception.
Practice for the EPA 608 Section You Need
Free to download. 1,000+ native-app practice questions plus refrigerant tools; review current purchase terms in your app store.
Looking for your state’s HVAC licensing requirements?
We cover EPA 608 and state HVAC licensing across all 50 states — exam providers, hours, and fees.
Browse HVAC exam prep by state →Free Web Tools
Free HVAC Prep Practice Questions
Browse topic-by-topic in your browser — no app required
Free Study Hub — Web App
Read the guide, memorize with flashcards, and test yourself — all in your browser, no download required.
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