Arguably one of the most important jobs that bathroom fans perform is to prevent mold. It's other job is also important, but mold can be a serious health risk, smells fade. So getting that moist air out of the house is critical.
The problem: most exhaust vents let moist air right back inside the house. They push hot air downward, and it rises right back through the passive soffit vents required to allow natural airflow for attic ventilation.

Much like the way an exhaust pipe pushes toxic fumes beyond the back of a combustion engine car, the NEW, patented SoffitFlow helps moist air flow safely beyond the soffit, past a home's fascia.
The SoffitFlow directs bathroom exhaust beyond the soffit. This prevents humid air from recirculating through the attic's passive ventilation system, reducing a prime cause of dangerous mold.