ICC IMC-2021 – 2021 International Mechanical Code



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    2021 ICC International Mechanical Code

    ICC IMC-2021 - 2021 International Mechanical Code


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    ICC IMC-2021 establishes minimum regulations for mechanical systems using prescriptive and performance-related provisions. The IMC was developed with broad-based principles that make possible the use of new materials, methods and design.

    Important changes in the edition include:

    • Clothes dryer exhaust terminals required to be at least 3 feet from any opening into a building.
    • Polyurethane spray-applied foam on the exterior of ducts in attics and crawl spaces required to meet specific smoke and flame index limits.
    • Fire and smoke dampers must be provided with approved access for inspection and maintenance.
    • Refrigerant tables updated to include new refrigerants.
    • Addition of condensate termination identification markings and discharge restrictions.
    • Approved factory-built combination intake/exhaust terminations permitted, relaxing separation requirement.
    • 30% reduction in minimum mechanical ventilation for whole-house balanced ventilation systems.
    • Continuous operation requirement for manicure and pedicure station exhaust systems.
    • Grease duct horizontal cleanout required within 3 feet of a horizontal discharge fan.
    SKU: IMC-2021 Brand:
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