AC Service Tech LLC vs A2L & EPA 608 Test Prep

Access all of your HVAC/R education needs in one place with the AC Service Tech App! For HVAC/R techs and students of all levels, the AC Service Tech App offers an easy-access pathway to all of our Online Academy, Calculators, Training Videos, Articles, Podcast Episodes, and More. Find all you need to expand your knowledge of the trade right here—anytime, anywhere. Through our app you can: AC Service Tech HVAC Academy - Access our online course platform where you can take courses and earn certificates on topics including our 45 hour 2nd Edition Refrigerant Charging & Service Procedures for Air Conditioning Book Course, unit installation, IAQ, airflow, metering devices, and much more. Our courses include engaging videos with informative content from some of the top HVAC instructors in the industry. Downloadable certificates are available at the end of each course, displaying the hours of training you received. Our app makes it easy to access your account on all your devices and stay logged in so you can spend more time learning. Watch Videos - The AC Service Tech YouTube channel has produced over 750 educational HVAC/R training videos that can be easily accessed through our app. From step-by-step installations, procedural videos, troubleshooting, and much more, these training videos cover a wide variety of topics to help you improve in all areas of your HVAC/R career. Use Calculators - Quickly calculate target superheat, refrigerant weight, CFM, recovery bottle max weight, and nitrogen pressure testing through our calculator tools. Simply fill in the information fields for easy and accurate calculations. Access All of Our Educational Content - Bookstore, Articles, Podcast Episodes, Quizzes, and more are all easy to navigate and are available in one place. Direct Link to our Social Media channels for all the latest updates.

Studying for EPA 608 or your A2L card? Practice with original exam-style questions and explanations, then keep the field tools you'll use on the job. EPA 608 PRACTICE — NEW • 250+ original questions across Core, Type I (small appliances), Type II (high-pressure) and Type III (low-pressure) • 25-question section mock exams, plus a 100-question Universal mock with all four sections in order • Each section is scored on its own against 18 of 25 — the commonly published pass mark — so you see exactly which section needs work • Written against the current federal rules: venting and de minimis releases, required evacuation levels, leak repair rates and deadlines, recovery equipment, recordkeeping, sales restriction and safe disposal • Quick 10 across all sections and single-section drills for review A2L / LOW GWP PRACTICE • 300+ original questions across 11 topics: A2L characteristics and ASHRAE 34 classes, flammability and GWP, codes, tools, handling and transport, leak detection, recovery and evacuation, servicing and charging, installation and charge limits, emergency procedures, retrofit • Quick 10, single-topic drills, and a 50-question mock exam with an optional timer • Math questions are solved by the same engine as the calculators STUDY YOUR WAY • Every answer comes with an explanation • Score by topic or section, review every miss, track accuracy over time — all stored on your phone • Switch between A2L and EPA 608 with one tap FIELD TOOLS YOU KEEP AFTER THE EXAM • Superheat and subcooling for R-454B, R-32 and R-410A, with dew and bubble point applied automatically on R-454B • Max Allowable Charge — nameplate check against the room's passive limit, with m1 / m2 / m3 charge tier • A2L quick reference and one-page PDF job tickets with your company branding BUILT FOR THE FIELD No account, no login, no signal required. Dark mode. Your progress and job data stay on your phone. FREE, WITH AN OPTIONAL $0.99 UPGRADE Every question and tool is free. Ads keep it that way; one daily mock exam is free and an optional short video unlocks another. A one-time $0.99 purchase removes all ads and unlocks unlimited mock exams. No subscriptions. SOURCES EPA 608 content: 40 CFR Part 82 Subpart F and Part 84 as of 2026. PT data: NIST REFPROP 10.0 via National Refrigerants (R-454B), Daikin / Hudson Technologies (R-32), National Refrigerants Reference Guide (R-410A). Max charge formula structure: UL 60335-2-40 / ASHRAE 15.2. Independent study tool. Not affiliated with, endorsed by, or approved by ESCO Institute, Mainstream Engineering, the U.S. EPA, or any certifying body. EPA 608 certification requires passing a proctored test from an EPA-approved certifying organization. All practice questions are original material.