About This Book
The 2024 International Mechanical Code (IMC), published by the International Code Council (ICC), is a model code establishing minimum, prescriptive, and performance-based requirements for the design, installation, maintenance, alteration, and inspection of permanently installed building mechanical systems.
Core Scope
The IMC covers: - HVAC – Heating, ventilation, and air conditioning systems - Air Distribution – Exhaust systems, ductwork, and combustion air provisions - Exhaust and Venting – Chimneys, vents, fireplaces, solid fuel-burning equipment, and commercial kitchen and dryer exhausts - Specialized Systems – Refrigeration, hydronic and fuel oil piping, solar thermal, boilers, water heaters, and pressure vessels
Key 2024 Updates
- Refrigerants – New identification requirements and rules for mildly flammable A2L and B2L refrigerants, aligned with lower global warming potential (GWP) standards
- Safety and Access – Mandatory minimum roof hatch landings, updated grease duct testing options, and new steam bath provisions
- Healthcare and Commercial – Outpatient healthcare ventilation requirements updated to align with ASHRAE 62.1-2019; UL 2158A standards integrated for commercial dryer exhausts
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Practice Tests Using This Book
This book is required or recommended for 6 licensing exams. We've written 58 practice questions directly from this material, each one citing the chapter and section it comes from.