What Does Exhaust Fan In Bathroom Do. Therefore it should have a fan rated for at least 54 CFM. Probably the biggest use of a bathroom vent fan is to help keep mold down in bathrooms especially in humid areas.
A properly installed bathroom fan provides ventilation drawing humid air. Moisture and humidity can significantly alter the life expectancy of appliances. The bathroom exhaust fan then moves the interior air out of the bathroom through a vent duct or flexible tube to the exterior.
When the fan is turned on the air is drawn out of the bathroom through the fan enclosure and into a plastic hose or metal duct leading to a vent opening on the roof or sidewall of the home.
Also known as a recirculating fan- this type of bath fan doesnt disperse air outside the house. In addition long-term exposure to excess moisture and humidity can crack and peel paint and wallpaper ruin wallboard. During a bath or shower humidity levels rise significantly creating the perfect breeding ground for mold mildew and microorganisms that can negatively impact health. When the fan is turned on the air is drawn out of the bathroom through the fan enclosure and into a plastic hose or metal duct leading to a vent opening on the roof or sidewall of the home.
