What is an exhaust fan in a bathroom?

Exhaust fans in the bathroom are mounted on the ceiling, allowing you to operate the exhaust fan inside via a switch electrical wall. Although bathroom exhaust fans vary in the amount of noise produced or accessories such as lights or elements heating staying in the same unit, exhaust fans all perform the same essential function.


An exhaust air bath serves two purposes. Since the fan draws air from the bathroom, it works well to remove odors from the room. Apart from removing odors, an exhaust fan bathroom also moves the moist air from the bathroom, which reduces moisture levels after someone, takes a shower or bath. The moisture in a bathroom can lead to water damage and mold growth, which can be detrimental to the health of people and can damage the surfaces where it grows.

Problems signals

Even if your exhaust fan in your bathroom makes noise as it runs, it does not mean that the fan is working properly. There are signs that the exhaust fan is not working as it should. After running the pump for several minutes, the humidity in the bathroom should drop significantly. If you notice that the mirror remains fogged or that frost has formed on the bathroom window during the cold weather months, the fan is not working as it should. A malfunctioning exhaust also lead to mold growth in the bathroom, as well as wallpaper and have water stains on the walls or ceiling.

The attic ventilation

Some bathroom exhaust fans simply move the moist air from the bathroom to the attic above. An exhaust fan in a bathroom should always send the air out of the house. The ventilation of moist air from the bathroom in the attic can lead to water damage on the ceilings, mold growth in the attic moisture damage and structural timber. The only way to tell if the exhaust fan in your bathroom is venting in the attic or on the outside of the house is up to the attic and visually inspect the exhaust fan.

Locations outside vent

The exhaust fan must be connected to flexible hose ventilation in the attic of the house, which in turn connects to a vent on the outside of the house. The vent can sit outside on the roof where it should be covered by a piece of cover. Flexible hose line can also be added to a vent on the side of the house or in the bottom of the ceiling. The location of the ventilation grille outside does not matter, as long as the exhaust fan bathroom is connected to flexible hose ventilation.