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.

The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. If you have access to the attic the fan can vent either through a gable wall or roof. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. 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.

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. You ll also see another safety hazard and code violation. It cannot move air to a crawlspace or attic. 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.

If you look closely you ll see two exhaust flues on the left side. Dumping bathroom exhaust into an attic or under roof space invites costly mold contamination frost under the roof in freezing climates moisture damage to roof sheathing possibly even plywood delamination or rot roof failures and shorter roof shingle life. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Bathroom vent exhausting into attic space.

You should never exhaust the bathroom fan directly into the attic. These stem vents should be properly connected to the bathroom ducts to ensure that moisture is traveling to the exterior not the attic space. No you cannot vent your bathroom exhaust fan into the attic. Fabricate the duct run from rigid metal or pvc material.

You should never do this. Avoid venting through a soffit vent or ridge vent. 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. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof.

It may also violate a shingle warranty. Keep calm if that happens to you. The installer sprayed foam directly on the metal flues. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons.

T he result of the insulation problem around a bathroom exhaust fan is either water stains or mold near the vent of your bathroom. Mount the fan high on the wall to better capture warm moist air. To be properly terminated bathroom fans should exit the home through stem vents that are specifically used for this purpose.