Bathroom Exhaust Open In Attic

The attic you see in the photo here is a different home but it does have one feature in common besides the spray foam.

Bathroom exhaust open in attic. Not all building jurisdictions require bathrooms to have an exhaust fan if the bathroom has an openable window that has 1 5 square foot of open area when open. Avoid venting through a soffit vent or ridge vent. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof.

Ask your hvac contractor about fabricating a duct run that extends from a fan mounted in a bathroom wall down through the floor and between floor joists out to an exterior wall. The installer sprayed foam directly on the metal flues. 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. It cannot move air to a crawlspace or attic.

To be properly terminated bathroom fans should exit the home through stem vents that are specifically used for this purpose. Are exhaust fans required for a bathroom. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. No you cannot vent your bathroom exhaust fan into the attic.

You should never exhaust the bathroom fan directly into the attic. T he result of the insulation problem around a bathroom exhaust fan is either water stains or mold near the vent of your bathroom. Bathroom exhaust fans perform an important function by removing excess moisture from your home. These stem vents should be properly connected to the bathroom ducts to ensure that moisture is traveling to the exterior not the attic space.

Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. If you look closely you ll see two exhaust flues on the left side. If you have access to the attic the fan can vent either through a gable wall or roof.

This section notes that air exhausted from the bathroom must be sent outdoors not indoors to the same residence or indoors to any other dwelling unit. You should never do this. Keep calm if that happens to you. Insulation problems will lead to other problems like the fan not being able to extract any humidity from the bathroom at all.

Fabricate the duct run from rigid metal or pvc material. It may also violate a shingle warranty. Mount the fan high on the wall to better capture warm moist air.