What is the maximum length allowed for clothes dryer ducts?

The maximum length allowed for clothes dryer ducts is specified to ensure proper airflow and prevent lint buildup, which can pose a fire hazard and reduce the efficiency of the dryer. A length of 35 feet is set as the upper limit, as this distance typically allows for an optimal balance between minimizing the potential for exhaust obstruction and maintaining adequate ventilation for the dryer.

The 35-foot measurement assumes that the duct is straight and unobstructed. For every additional bend or transition in the duct, a portion of that maximum length is deducted. Therefore, it is essential to adhere to this maximum to promote safe and efficient dryer operation, ensuring that the exhaust air can exit the home effectively without hindrance.

In contrast, other lengths suggested in the options are either too short or too long to support effective dryer ventilation based on standard building codes and safety guidelines.