SMACNA Introduces First Phenolic Duct Construction Standard

CHANTILLY, Va. — The Sheet Metal and Air Conditioning Contractors’ National Association’s first edition of the “Phenolic Duct Construction Standard” provides basic phenolic duct fabrication and installation standards that sheet metal contractors, code officials and design engineers will find useful. It is a new American National Standard.

This new 144-page standard for phenolic air distribution system material provides for the basic fabrication and installation methods. It applies to ducts up to 80 inches by 80 inches that operate to 4-inch wg positive or 3-inch negative pressure class.

The new publication includes model project specifications, duct performance characteristics, specifications and closures, fittings and connections, reinforcement, hangers and support, accessories and an inspection checklist.

Phenolic foam insulation is a versatile material with high thermal performance, moisture resistance, fire performance and structural strength. Phenolic panels used for air-distribution ductwork leverage these features by manufacturing the insulation into rigid panels with aluminum facings on both sides of the panel.

Order copies at SMACNA’s online bookstore at

  • Discounted prices are available for architectural and engineering firms (provided they are not in the contracting business), government agencies, schools and libraries: Book $110, CD $132, Book/CD Combo $182, PDF $110
  • List prices are: Book $159, CD $191, Book/CD Combo $262, PDF $159