# HVAC Prep: EPA 608 Exam 2026

> Refrigerant calculator + P/T charts + 1000+ practice questions.

Canonical page: [https://chrome-stats.com/d/com.projectvolt.hvacprep](https://chrome-stats.com/d/com.projectvolt.hvacprep)

## Overview

- **ID:** `com.projectvolt.hvacprep`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** VoltExam
- **Category:** EDUCATION
- **Downloads:** 25
- **Version:** 1.1.3
- **Last updated:** 2026-09-02
- **First published:** 2026-05-25
- **Publisher country:** CA
- **Size:** 3.03 MB
- **Data as of:** 2026-09-14
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.projectvolt.hvacprep)
- **Website:** [https://www.voltexam.com](https://www.voltexam.com/)
- **Privacy policy:** [https://www.voltexam.com/privacy](https://www.voltexam.com/privacy)

## Description

HVAC EPA 608 EXAM PREP: PASS YOUR CERTIFICATION ON THE FIRST TRY<br><br>Every HVAC technician working with refrigerants must hold an EPA 608 certification under Section 608 of the Clean Air Act. The exam has four sections — Core, Type I, Type II, and Type III. You need to pass all four to earn your Universal certification. A passing score is 18 out of 25 correct on each section, graded independently.<br><br>Most technicians fail because they don&#39;t know which section is weak until they&#39;re in the testing center. This app tracks your score separately for each section so you know exactly where to focus before exam day.<br><br>REFRIGERANT CALCULATOR<br><br>The data the Core section tests every single time. Covers R-410A, R-22, R-32, R-134a, R-404A, and R-407C. For each refrigerant: ODP (ozone depletion potential), GWP (global warming potential), operating pressures, refrigerant type (HCFC, HFC, HFO), and phase-out status under the AIM Act and Montreal Protocol.<br><br>These values appear on the Core exam in almost every sitting. Most technicians memorize them wrong. This calculator gives you the correct values instantly and explains why they matter.<br><br>PRESSURE-TEMPERATURE REFERENCE<br><br>Instant P/T lookups for all common refrigerants. Enter a pressure, get the saturation temperature. Enter a temperature, get the pressure. Includes superheat and subcooling references for R-410A and R-22.<br><br>1,000+ PRACTICE QUESTIONS<br><br>Core: Ozone chemistry, Clean Air Act Section 608, refrigerant safety and handling, recovery requirements, leak detection, record keeping, sales restrictions, civil and criminal penalties.<br><br>Type I (small appliances, 5 lbs or less): Passive recovery, system-dependent recovery, disposable cylinder requirements, recovery efficiency standards.<br><br>Type II (high-pressure systems): Evacuation levels, recovery equipment certification, leak repair requirements for systems with 50+ lbs of refrigerant, low-loss fittings, pressure testing.<br><br>Type III (low-pressure systems, chillers): Deep vacuum requirements, purge unit operation, pressurization for leak testing with nitrogen, chiller-specific leak rates and repair timelines.<br><br>Universal: All four sections combined, weighted to match the actual exam distribution.<br><br>Every question tells you which section it covers, explains why the correct answer is right and why each wrong answer is wrong, and references the specific EPA regulation.<br><br>MOCK EXAM MODE<br><br>25 questions per section, timed, no explanations until complete. Get your pass/fail for each section separately — exactly how the real exam scores it.<br><br>Free: 5 questions per day, refrigerant calculator for R-410A and R-22, Core section overview.<br><br>Monthly ($9.99): Unlimited questions, complete refrigerant calculator, P/T reference, mock exam, per-section tracking, 3-day free trial.<br>Annual ($49.99): Everything monthly. Save over 55 percent. Best value.<br>Lifetime ($49.99): One payment. Permanent access.<br><br>PASS PROMISE: Complete all questions with 80% or higher average, hold active subscription for 3 months, still do not pass. We extend your access by 4 months at no charge. voltexam.com/pass-promise<br><br>Not affiliated with the EPA or any authorized testing organization. This is an independent study tool.<br><br>Privacy Policy: https://www.voltexam.com/privacy<br>Terms of Service: https://www.voltexam.com/terms

## Rankings

- #2,515,463 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.projectvolt.hvacprep.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.projectvolt.hvacprep)