What is the maximum developed length for a clothes dryer duct?

The maximum developed length for a clothes dryer duct is important because it affects the efficiency and safety of the dryer operation. The correct answer, which indicates a maximum developed length of 35 feet, ensures that the dryer can effectively exhaust lint and moisture while minimizing the risk of fire hazards that can occur when exhaust airflow is restricted.

When a dryer duct is too long or has too many bends, the resistance can hinder the airflow, potentially leading to increased drying times, energy inefficiency, and lint buildup, which significantly increases fire risk. The 35 feet guideline allows for a standard run of duct that accommodates variations in installation while ensuring that dryers can operate safely and effectively.

In addition, this standard typically considers straight runs and adjusts the maximum length based on allowances for bends or turns in the ductwork, which can further complicate airflow. This balance protects the performance of the dryer while adhering to safety practices established by manufacturer guidelines and building codes.