Why Bathroom Fan Vented Into Attic

This involves running ductwork from the fan usually though an attic and out through the roof.

Why bathroom fan vented into attic.

It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. The truth about attic bathroom venting. 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. This moist air will cause condensation on the surfaces in your attic.

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

Bathroom exhaust fans perform an important function by removing excess moisture from your home. Venting the fan into the attic can cause many issues because of the moist air the fan removed from the bathroom. Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside.

No you cannot vent the bathroom exhaust fan into the soffit vents. Can you vent a bathroom exhaust fan into the soffit vents. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. I would by lying if i told you that it will cause problems it may be totally fine.

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. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. This can not only cause mold but damage to your roof system. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.