My bathroom has a window but it can't be opened when someone is taking
a shower and moisture builds up fast.
I would like to install an exhaust fan in the ceiling but I have a tile
roof so it can't go out through the roof. My dryer was originally
vented out through the roof (it's at the other end of the house) but it
stopped working right and a man who does repairs came in and ran a new
vent pipe up into the attic and out through the soffit. It works fine.
I am wondering if there is any reason why I can't do the same thing
with the bathroom.
If the exhaust is closely connected to the soffit vent, you can get
away with it.
It is better than dumping warm, moist air into the attic.
I'd rather run the vents our through the wall with a dedicated end cap.
This would insure unrestricted venting and insure excluding the moist
air from the attic.
The thing I would tend to think about out the soffit (dryer or bath) is the
moisture quickly rises getting trapped under the soffit while the vent is
running...aka rot and/or mold. Can you run it out a gable end?
It's just an air-duct. Get a powerful fan, and you can pipe the air
down into the basement, out the wall, under the yard, around in a
little spiral and out into one of those stupid little fake wells.
Use PVC duct for the outside part.
It is possible to vent out the soffit, but it is not considered a good
choice because the warm moist vented air tends to be sucked into the nearest
vent back into the attic where it can cause mold and rot problems. Out the
side of the house is often a better option.
You can do the soffit type, many are done this way, including the ones
in my home. A lot depends on doing it right. The fan should be
vented to an outlet of it's own placed in the soffit. Many times the
shortcut of just routing the hose over to the existing soffit vent and
leaving it next to it is done. That can result in the mold/moisture
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