HVAC Certification Guides
Straight answers about EPA 608 certification, exam costs, and getting hired — built on EPA.gov and certifying-organization primary sources, not guesswork.
Put the reading into practice
When you're ready to study, our free EPA 608 practice tests and the certification requirements page pick up where these guides leave off. No signup, no paywall.
HVACTechTest is an independent study resource and is not affiliated with, endorsed by, or sponsored by the U.S. Environmental Protection Agency, ESCO Institute, or any certifying organization.