Foam plastic used as duct linings must conform to which section of the North Carolina Mechanical Code?

Foam plastic used as duct linings must conform to Section 604 of the North Carolina Mechanical Code because this section specifically addresses the requirements for duct systems incorporating foam plastic, ensuring they meet fire safety standards. Section 604 outlines conditions regarding the installation of duct linings, focusing on the materials allowed, fire ratings, and the necessary tests that must be conducted to ensure their safety in various heating, ventilation, and air-conditioning (HVAC) applications.

By specifying these requirements, Section 604 helps to reduce the risk of fire hazards associated with the use of foam plastic in ductwork, thereby contributing to the overall safety and performance of mechanical systems. Compliance with this section ensures that the duct lining materials can withstand operational temperatures and won’t pose an increased fire risk, which is critical for maintaining the safety standards in building construction and HVAC system design.