At what maximum interval must clothes dryer exhaust ducts be supported?

In the context of the North Carolina Mechanical Code, maintaining proper support for clothes dryer exhaust ducts is essential for ensuring safe and efficient operation. The correct answer indicates that the maximum interval at which these ducts must be supported is 4 feet.

This requirement is in place to prevent sagging, bending, or any form of obstruction that could restrict airflow, which is critical for the dryer’s efficiency and safety. Inadequately supported ducts may not only lead to inefficient drying but can also increase the risk of lint buildup, which poses a fire hazard.

By stipulating a 4-foot maximum interval for support, the code ensures that the ducts maintain their integrity and performance over time. This regulation supports the overall safety and functionality of the dryer system in residential and commercial settings.