What is the primary concern with lint buildup in dryer ducts?

Lint buildup in dryer ducts is primarily a concern because it creates a fire hazard. As lint accumulates, it can block the airflow through the duct, leading to overheating of the dryer and the duct system. This overheating can ignite the lint, especially since it is a flammable material. In fact, the U.S. Fire Administration reports that dryer fires are a significant risk, and one of the leading causes of these fires is the failure to clean these ducts adequately.

While lint buildup can also lead to other issues such as increased drying time and reduced efficiency of the dryer, the most critical risk associated with it is the potential for fire. Therefore, it is essential for homeowners and maintenance professionals to regularly inspect and clean dryer ducts to prevent lint buildup and mitigate this serious hazard.