What is the maximum length allowed for flexible air connectors?

The correct answer is based on the provisions set out in the North Carolina Mechanical Code, which specifies that the maximum length allowed for flexible air connectors is 14 feet. This limitation is established to ensure proper airflow, system efficiency, and to prevent issues such as excessive pressure drops that could occur if connectors are too long. By adhering to this maximum length, the integrity of the HVAC system is maintained, promoting optimal performance and safety. Additionally, using flexible connectors within this prescribed limit helps to mitigate mechanical strain on the ductwork and connections, thereby reducing the risk of damage or failure over time.