IMC Code Hub
The International Mechanical Code (IMC) establishes minimum requirements for mechanical systems including HVAC, exhaust systems, and ductwork. Use the study tools below to prepare for your exam.
Important Notice
Code requirements vary by jurisdiction. Always verify local amendments and requirements with your local authority having jurisdiction (AHJ).
Practice Tests
IMC Practice Tests
Timed, randomized questions covering IMC and journeyman mechanical code topics.
Flashcards
IMC Flashcard Decks
Review key IMC terms, code requirements, and definitions by chapter.
Chapters
IMC Chapter Index
Browse all covered IMC chapters for the 2021 edition.
Study Guide
HVAC Equipment
- Equipment installation requirements
- Access and service clearances
- Appliance listing and labeling
- Condensate drainage
Ductwork
- Duct materials and construction
- Duct sizing and installation
- Fire and smoke dampers
- Duct insulation requirements
Ventilation
- Outdoor air requirements
- Exhaust system requirements
- Kitchen and bathroom ventilation
- Garage ventilation
Combustion Air
- Combustion air calculations
- Indoor air vs outdoor air
- Opening sizes and locations
- Engineered systems
Browse IMC Chapter Index
Open the complete chapter-by-chapter IMC guide library.
Related Resources
ICC Digital Codes - IMC
Official CodeOfficial International Code Council digital access to the International Mechanical Code.
ASHRAE Standards
Industry StandardTechnical standards from the American Society of Heating, Refrigerating and Air-Conditioning Engineers.
SMACNA - Sheet Metal and Air Conditioning Contractors
Industry ResourceTechnical manuals and standards for HVAC ductwork design and installation.