Transition duct connectors must comply with which standard?

Transition duct connectors are essential components in HVAC systems, allowing for the smooth connection between different types of ductwork. The standard that governs transition duct connectors is UL 2158A. This standard specifically pertains to the safety and performance requirements for flexible ducts and air connectors designed for high-temperature applications, which makes it particularly relevant for transition duct connectors.

Compliance with UL 2158A ensures that these connectors meet the necessary criteria for durability, safety, and efficiency in HVAC systems, including resistance to fire and the ability to withstand mechanical stress. This is crucial in maintaining proper airflow and preventing leaks, which could lead to decreased system performance and potential safety hazards.

The other standards listed, while relevant to various aspects of ductwork and HVAC systems, do not specifically address the requirements for transition duct connectors. Therefore, UL 2158A is the correct standard to reference when discussing compliance for these components.