Bathroom Vents Into Attic

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

Bathroom vents into attic.

Bathroom exhaust fans perform an important function by removing excess moisture from your home. How to repair a bathroom fan. I was listening to one of your shows earlier and you were talking about how the bathroom vents are vented into the attic. It cannot move air to a crawlspace or attic.

And i have that problem regarding that. While this may seem obvious homeowners may out of convenience direct the vent into either of these locations. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. The water will condense and drip into the insulation below and perhaps into the house.

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. I mean it s right into my insulation. You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it.

Can you vent a bathroom exhaust fan into the soffit vents. It s not vented out by any means. A very common problem. 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.

But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. We explain how to install bathroom exhaust fans or vents the vent ducting. 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. 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.

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. On my home inspections it is still a common sight for me to see bathroom vents going directly into the attic spewing moisture. 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.