Bathroom Vents To Attic Or Outside

This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

Bathroom vents to attic or outside.

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. Surprisingly bathroom fans are not required by some building codes. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. You may be able to configure a short route.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. 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. No matter the location of the bathroom you can vent the exhaust fan through the wall. Bathroom exhaust fans perform an important function by removing excess moisture from your home.

When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. So can you vent a bathroom exhaust fan into the attic. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. 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.

This can also cause mold to form on wood or insulation in an attic space above a bathroom. No you cannot vent your bathroom exhaust fan into the attic. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. There are really only three venting options.

Options for venting a bathroom exhaust fan include best to worst. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. How to install a bathroom vent fan. We explain how to install bathroom exhaust fans or vents the vent ducting.

Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. The location of the bathroom will determine how extensive the ductwork will be. Ductwork is what will connect the fan to the outside.

You should never exhaust the bathroom fan directly into the attic.