Bathroom Vents To Attic Or Outside

Bathroom exhaust fans perform an important function by removing excess moisture from your home.

Bathroom vents to attic or outside.

You should never exhaust the bathroom fan directly into the attic. A 3 or 4 inch duct connects to the outlet on the fan housing and runs to a side wall or to the roof and connects to a vent cap that allows the. The bathroom exhaust ventilation fan disperses air through an opening in the fan housing which is usually 3 inches in diameter and ideally faces in the direction of the ventilation system outlet. Mold in a bathroom can be caused by a plumbing leak but splotchy stains on wall or ceiling surfaces usually indicate inadequate ventilation too much moisture in bathroom air.

Options for venting a bathroom exhaust fan include best to worst. You may be able to configure a short route. No you cannot vent your bathroom exhaust fan into the attic. This can also cause mold to form on wood or insulation in an attic space above a bathroom.

Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Vent your bath and kitchen exhaust fans through the roof through a special roof hood.

But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. Ductwork is what will connect the fan to the outside. We explain how to install bathroom exhaust fans or vents the vent ducting. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair.

This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details. Surprisingly bathroom fans are not required by some building codes. The location of the bathroom will determine how extensive the ductwork will be. There are really only three venting options.

This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. So can you vent a bathroom exhaust fan into the attic. How to install a bathroom vent fan. No matter the location of the bathroom you can vent the exhaust fan through the wall.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.