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On Sep 2, 4:27 pm, "David Martel" wrote:
Where does this fan exhaust, the attic, a roof vent? Have you checked the
duct work all the way up to the roof or where ever? I suspect that the fan
can't exhaust because of crud.

Dave M.

Dave,
The exhaust goes out the wall just below the soffit. No indication
that the fan or exhaust portion is plugged. In fact, the system clears
the bathroom quite nicely when the intake slots are clear.
One issue seems to be that the edges of intake slots are quite
rough, which catch detritus and start the accumulation process. Of
course, because of the placement (and size) of the slots, there's no
way to get in and smooth them... and that would probably wreck the
finish anyway.
-CT