What is the purpose of a dryer vent?

The purpose of a dryer vent is to exhaust air and moisture from a clothes dryer. When clothes are drying, they release water vapor and heat, which can create a high level of humidity if not properly vented. The dryer vent serves to guide this warm, moist air outside the building, preventing moisture accumulation inside that could lead to mold, mildew, or damage to the structure. Proper venting is essential for the efficient operation of the dryer, as it ensures that the appliance can dry clothes effectively while maintaining safety by reducing the risk of overheating and potential fire hazards that can occur if lint buildup obstructs airflow.

The other options address functions that do not align with the primary role of a dryer vent, which is specifically focused on exhaust rather than supply or regulation.