To limit the probability that air from laundry-drying equipment will not be properly vented or exhausted, which could lead to the accumulation of air contaminants, which could be ignited in the presence of an ignition source, which could lead to fire or explosion, which could lead to damage to the building.
To limit the probability that exhaust ducts from laundry-drying equipment will be connected to other exhaust ducts, which could lead to a buildup of lint in exhaust ducts, which could be ignited in the presence of an ignition source, which could lead to fire, which could lead to harm to persons.