Resources

Study materials and references to help you prepare for HVAC certification exams.

Code-Family Hubs

Practice tests, flashcards, and study guide for the International Fuel Gas Code.

Practice tests, flashcards, and study guide for the International Mechanical Code.

Practice tests, flashcards, and study guide for the EPA 608 refrigerant certification.

Choose a hub for your code family, review the overview and study materials, then move into practice tests or flashcards when you're ready.

Chapter-by-chapter study guide for the International Fuel Gas Code — scope, definitions, gas piping, venting, and appliance requirements.

Chapter-by-chapter study guide for the International Mechanical Code — ventilation, duct systems, exhaust, combustion air, and more.

Comprehensive guide covering refrigerant handling, certification types, recovery requirements, and exam preparation tips.

Links to official International Fuel Gas Code resources for gas piping, appliance installation, and venting requirements.

Links to official International Mechanical Code resources for HVAC equipment, ductwork, and ventilation systems.

Learn the HVAC licensing requirements for every U.S. state, including licensing authority, exam requirements, and continuing education rules.

Searchable glossary of common HVAC terms, definitions, and concepts essential for certification exams.

Searchable glossary of electrical terms, formulas, and concepts used in HVAC systems.

After reviewing these resources, put your knowledge to the test with our free practice exams.