2012 International Mechanical CodeĀ®

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Establishes minimum regulations for mechanical systems using prescriptive and performance-related provisions. First introduced in 1996, the IMC was developed with broad-based principles that make possible the use of new materials, methods and design.

Changes include:
  • New and existing mechanical systems must be maintained in accordance with ASHRAE/ACCA/ANSI Standard 180.
  • Parking garage exhaust now defined as environmental air.
  • Includes specifications for grease reservoirs in commercial cooking exhaust duct systems.
  • Includes requirements for underground grease ducts.
  • Requires any combustible material in a return air plenum to be listed and labeled to verify compliance with ASTM E-84 or UL 723.
  • Air dispersion systems are now allowed.
  • New requirements for evaporative coolers.

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