Venting Attic Bathroom Fan

Bathroom exhaust fans perform an important function by removing excess moisture from your home. The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside. In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly.

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Bathroom Exhaust Fans Left To Discharge Into The Attic Will Cause Moisture And Mold Issues Always Vent The Bathroom Vent Bathroom Exhaust Bathroom Exhaust Fan

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Can you vent a bathroom exhaust fan into the soffit vents.

Venting attic bathroom fan.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. 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. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. No you cannot vent the bathroom exhaust fan into the soffit vents.

But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. Bathroom exhaust fan venting code summary section r303 3. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.

I would by lying if i told you that it will cause problems it may be totally fine. Bathrooms must have windows when this section is adopted by a community it essentially says that for venting purposes bathrooms must have windows that open. The truth about attic bathroom venting. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.

If you vent the bathroom exhaust fan to close to the soffit vents which are vented plates under your homes outer edge and roof your home the air can be sucked right back into the attic from the soffit.

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