IMC Code Reference

The International Mechanical Code (IMC) establishes minimum requirements for mechanical systems including HVAC, exhaust systems, and ductwork. Below are official resources and key topics.

Important Notice

Code requirements vary by jurisdiction. Always verify local amendments and requirements with your local authority having jurisdiction (AHJ).

Official Resources

ICC Digital Codes - IMC

Official Code

Official International Code Council digital access to the International Mechanical Code.

ASHRAE Standards

Industry Standard

Technical standards from the American Society of Heating, Refrigerating and Air-Conditioning Engineers.

SMACNA - Sheet Metal and Air Conditioning Contractors

Industry Resource

Technical manuals and standards for HVAC ductwork design and installation.

Key Topics Covered

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

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