Why you need a bathroom exhaust fan
A bathroom fan, properly ducted to the outside world, is important for the health of a home and its occupants. Without an exhaust fan, harmful mold, mildew and bacteria can multiply in a humid environment. When this occurs over a prolonged period it can cause damage to wall coverings and to the structure of walls and doors. Moisture left on mirrors and bathroom fittings can lead to rusting and corrosion.