You may be tempted to use a dryer vent for a bathroom exhaust fan, but it's not recommended. The ventilation grilles in bathrooms are humid and warm, filled with moisture. Vinyl vent pipes, even if available, have been replaced with better ventilation pipes and may even be illegal in your area. Whether it's the exhaust fan in a bathroom, the kitchen hood vent, or the dryer vent, any type of penetration into the house envelope for ventilation can let in cold air.
Homeowners insurance companies always look for loopholes so they don't compensate you for damage, and you find them when you combine the dryer vent and the bathroom fan. But leaving the law aside, combining the ventilation of the dryer with that of the bathroom fan leads to problems, since there is a risk of lint forming, which can cause fires, and that humid air will penetrate the bathroom and damage its walls and ceilings. If you're considering using a dryer vent for a bathroom exhaust fan, it's important to understand why it's not recommended. After disconnecting the dryer from the electrical outlet, separate the tube that goes from the dryer to the house. It is generally not acceptable to use a dryer vent duct for the bathroom fan, as the duct can introduce moisture or lint into the fan.
Therefore, if these two ducts are combined, it is likely that the dryer duct will accumulate more debris, dirt, and other unwanted fragments, making cleaning difficult. A dryer and a bathroom fan have one thing in common: they all emit exhaust air that must be expelled. Properly installing the dryer vent, keeping it clean, and fixing minor problems are simple, affordable, and essential ways to help the dryer work properly. Using a vacuum cleaner, clean the ventilation grille that comes out of the dryer and the ventilation cover assembly attached to the house. Installing a ventilation grille and a tube in a dryer is a simple project, especially since it is possible to buy complete ventilation kits for dryers with all the items you need. Keeping the dryer vent clean and airtight will only help improve its overall operation. Dryer vents filled with lint and other debris are responsible for nearly 3,000 home fires and five deaths per year.
Often these old-fashioned lint filters are those that allow lint to accumulate, causing fires in the ventilation grilles of dryers. In conclusion, using a dryer vent for a bathroom exhaust fan is not recommended due to safety concerns. It is important to keep your dryer vent clean and properly installed to avoid any potential fire hazards.