About 608Prep: Free EPA 608 Practice Tests and Guides

608Prep is an independent site. 608Prep publishes free EPA 608 practice tests and plain-language guides to Section 608 certification, built from the EPA's own exam topic outline and current refrigerant regulations.

What this site is

This site exists to get one exam right: the EPA Section 608 certification. We built separate practice sets for Type I, Type II, Type III, and Universal because the refrigerant-handling rules differ by appliance type, and mixing them together just confuses people studying for a specific card. Every question traces back to the actual 608 regulation text, not a paraphrase of a paraphrase.

How we work

We start from 40 CFR Part 82 and the EPA's own certification guidance, then cross-check against the testing organizations that administer the exam. Content on this site is drafted with AI assistance and then checked line by line against those source documents before it goes live; see our editorial policy for the full process. If a refrigerant recovery threshold or a leak-rate rule changes, we update the page and note when.

How we make money

The practice tests and guides cost nothing to use. We keep the lights on through affiliate commissions when a reader buys HVAC tools, refrigerant equipment, or a paid test-prep course through a link on this site. Read the specifics in our disclosure.

Corrections

Found a wrong recovery rate or an outdated citation? Tell us through the contact form. We fix it and log when the fix went live.