46erjoe wrote:
I vented mine directly into the attic overhead, which had 2 very large
screened window type vents on both ends. Never had any problem with
moisture. Not sure it was code though.



On Wed, 31 May 2006 19:38:25 -0400, "JA"
wrotF:

Would anyone like to weigh in on where I should vent a bathroom fan? (Not
the attic--I know that!) I've found that some home repair sites say it's OK
or preferred to vent through the soffit; others say this is nearly as bad as
venting into the attic and that one should vent through the roof; and yet
others say to avoid the roof and go through the soffit or gable end of the
house.

Does this all depend on where you live? For instance, in areas with heavy
snow, the roof vent could get blocked and therefore venting through the
soffit would be preferred, but everywhere else the roof is the way to go?
Is it really bad to vent through the soffit?


That's fine because your attic is actually outside. The advice should
be to vent on the outside of your insulation layer. This way if you
dump a cubic foot of air at 100% relative humidity into the outside, the
RH of that cubic foot will instantly drop to very close to the outside
value. For condensation to form, the RH must be 100% on a colder surface.