What is the maximum design temperature allowed for air to be conveyed in flexible air ducts?

The maximum design temperature allowed for air conveyed in flexible air ducts is 250°F. This limit is established to ensure the safety and efficiency of the duct system. At temperatures exceeding this threshold, there is a risk of material degradation, which can lead to leaks, reduced performance, and potentially harmful situations such as fires or the release of toxic fumes from the duct material itself.

Flexible ducts are typically made from materials that are designed to handle specific temperature ranges, and exceeding 250°F can compromise their structural integrity. Maintaining air temperature within this safe range not only protects the ductwork but also promotes optimal airflow and energy efficiency in heating, ventilation, and air conditioning (HVAC) systems.

Understanding these limitations is crucial for professionals in the HVAC field, as it ensures compliance with the mechanical code and promotes the longevity and safety of installed systems.