California Mechanical Inspector
I4
Study topics (Chapters)
Chapter 1: Administration
Chapter 2: Definitions
Chapter 3: General Regulations
Chapter 4: Ventilation Air Supply
Chapter 5: Exhaust Systems
Chapter 6: Duct Systems
Chapter 7: Combustion Air
Chapter 8: Chimneys and Vents
Chapter 9: Installation of Specific Appliances
Chapter 10: Boilers and Pressure Vessels
Chapter 11: Refrigeration
Chapter 12: Hydronics
Chapter 13: Fuel Gas Piping
Study resources
CMC vs. IMC: Why National Study Guides Will Make You Fail in California
How to Pass the ICC I4 California Mechanical Inspector Exam
What’s New in the 2025 California Mechanical Code (CMC)?