Hi,
I was vacuuming out my bathroom exhaust fans and got to wondering...
where do they go? There is no vent coming out of the roof for the
exhaust (nor do any of the other homes in the neighborhood). Do they
feed into the sewer vent that goes out the roof? The drier vent and
the basement exhaust exit the house thru vents near ground level.
Surely these are not shared by the bathrooms on the 2nd floor are they?
Also, they do not just vent into the attic (thankfully).

So, where do they go?

Thanks in advance.