What is the maximum design air temperature for flexible air ducts and connectors?

The maximum design air temperature for flexible air ducts and connectors is 250 degrees Fahrenheit. This temperature limit is established to ensure the safe operation and longevity of the duct materials. Most flexible ducts are made from materials that can withstand elevated temperatures but have specific thermal limits.

Exceeding this temperature can lead to the degradation of the duct materials, which may result in a loss of efficiency, potential leaks, and even pose fire hazards in extreme circumstances. Therefore, adhering to the 250 degrees Fahrenheit standard helps maintain optimal performance of the HVAC system while ensuring safety and compliance with the North Carolina Mechanical Code.