If the length of an electric dryer vent exceeds 35 feet, what requirement must be fulfilled?

When the length of an electric dryer vent exceeds 35 feet, it is important to label the length on the wall to ensure proper awareness and compliance with safety regulations. Labeling serves as a point of reference for anyone who may need to inspect, maintain, or modify the venting system in the future. By clearly indicating the length, it helps prevent potential issues such as inefficient airflow or increased risk of lint buildup, which can lead to fire hazards.

Labeling the vent length is part of ensuring that the installation adheres to manufacturer specifications and local building codes, making it critical for safety and functionality. Proper identification also assists technicians and homeowners in understanding the limitations and requirements of the system, encouraging safer operation and maintenance practices.