Yes, the bathroom exhaust fan must be vented to the outside to be up to code. Venting into an enclosed space like an attic, crawl space or in between the floor joists could cause moisture build-up and lead to mold, mildew or rot.
The venting length for bathroom exhaust fans needs to be as short as possible with the fewest bends possible. It also needs to exit either through the side of the house or the roof of the home. Long runs of ducting will collect moisture and can drip back inside the home, causing water damage.
Poorly vented exhaust fans can cause plenty of problems in your home. Old fans that were not vented properly have been found to have an abundance of mold growing on the wood or insulation around the fan causing poor indoor air quality and allergy issues.
Powder rooms that have a toilet and sink are required to have a way to move air, either by opening a window or turning on an exhaust fan.
Haas & Sons is here to help with your bathroom exhaust fan! We provide unmatched quality service to every job we do, earning us the title of Your Neighborhood Electrician! Contact Haas & Sons online today and one of our knowledgeable team members will be in touch shortly!