IMC 2021 and IFGC 2021|2021 International Fuel Gas Code|2021 International Mechanical Code

ISBN: 9781609839666 ISBN: 9781609839642 International Code Council

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 2021 IMC 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.

IFGC 2021 Addresses the design and installation of fuel gas systems and gas fired appliances through prescriptive and performance requirements. Key changes in the 2021 IFGC include: The termination of concealed condensate piping requires marking to indicate if it is the primary drain or the secondary drain. Press-connect joints are acceptable for high pressure (over 5 psi) applications indoors. Commercial cooking appliances are not allowed within dwelling units.

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