What is a potential risk of a duct blocked by lint?

When a duct is blocked by lint, it significantly reduces airflow within the system. The restriction caused by the lint build-up forces the dryer to work harder than necessary to push air through the duct, leading to inefficient operation. This reduced airflow not only compromises the effectiveness of the dryer, making it less efficient but also creates conditions conducive to a fire hazard. Accumulated lint is highly flammable, and when air cannot circulate properly due to a blockage, high temperatures can build up, increasing the risk of a fire.

Additionally, while one might think that such a blockage could prevent moisture buildup or enhance ventilation, the reality is that the lack of sufficient airflow can lead to moisture retention in other areas, potentially causing mold growth and other moisture-related issues. Therefore, the correct understanding of the implications of lint blocking the duct is crucial for both safety and efficiency in ventilation systems.