Bathroom Vents Into Attic

Special bathroom fan roof vents with an internal damper that opens only when the fan is blowing will send moist air outdoors and keep cold air out of the house.

Bathroom vents into attic.

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. No you cannot vent the bathroom exhaust fan into the soffit vents. 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.

We explain how to install bathroom exhaust fans or vents the vent ducting. It s not vented out by any means. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. And i have that problem regarding that.

It cannot move air to a crawlspace or attic. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. Bathroom exhaust fans perform an important function by removing excess moisture from your home. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.

The problem with this approach is that all of the moisture in the air goes onto the wood sheathing insulation wood rafters and wood ceiling joists which can lead to mold growth and rot. How to install a bathroom vent fan. You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it. I mean it s right into my insulation.

A very common problem. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. How to repair a bathroom fan. 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.

I was listening to one of your shows earlier and you were talking about how the bathroom vents are vented into the attic. This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details. Can you vent a bathroom exhaust fan into the soffit vents.