What is the design air temperature for air to be conveyed in flexible air ducts and connectors?

The design air temperature for air being conveyed in flexible air ducts and connectors is 250°F. This temperature limit is established to ensure safety and efficiency in the operation of air distribution systems. Exceeding this temperature could lead to degradation of the materials used in flexible ducts, which are often made of materials that may not withstand higher temperatures without failure.

Additionally, maintaining air temperatures within this limit helps in preserving the integrity of the ductwork, ensuring that it can function effectively without risk of melting or losing shape, which could lead to air leaks and decreased system efficiency. Thus, the choice of 250°F aligns with industry standards that prioritize both performance and safety in HVAC applications.