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.

Bathroom vents into attic.

It s not vented out by any means. It cannot move air to a crawlspace or attic. Can you vent a bathroom exhaust fan into the soffit vents. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.

We explain how to install bathroom exhaust fans or vents the vent ducting. I was listening to one of your shows earlier and you were talking about how the bathroom vents are vented into the attic. 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. On my home inspections it is still a common sight for me to see bathroom vents going directly into the attic spewing moisture.

Bathroom exhaust fans perform an important function by removing excess moisture from your home. 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. A very common problem. 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 mean it s right into my insulation. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it. How to install a bathroom vent fan.

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. No you cannot vent the bathroom exhaust fan into the soffit vents. The water will condense and drip into the insulation below and perhaps into the house. How to repair a bathroom fan.

Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.