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Posted by Howard on June 8, 2006, 6:33 pm
There is also a vent damper that exits thru and down from the soffit
which puts it in easy reach and well protected.
Mike wrote:
> Joseph Meehan wrote:
> > Mike wrote:
> > > I've seen plenty of postings that one should not vent bathroom fans to
> > > soffit or ridge vents. I completely agree about not using the
> > > soffits. But how about using some blue foam, or other material, and
> > > making some sort of 4" round pipe to ridge vent adapter. Think of
> > > all the sheet metal HVAC adapters at home centers. But I'm thinking
> > > of just fabricating something that custom fits my roof/ridge vent at
> > > one end and a 4" round opening at other end. I can purchase a 4"
> > > sheetmetal colar to make the round opening in the foam. This would
> > > force 99% of the moist bathroom air directly out a portion of the
> > > ridge. The foam adapter would protect the roof sheathing from
> > > moisture, plus it's easily built on site.
> > >
> > > Downfalls? reduced ridge ventilation for the attic - but I doubt
> > > enough to have any impact
> > >
> > > Appreciate any comments...
> > >
> > > Thanks!
> > >
> > > -Mike
> >
> > I don't think I would want to do it. However if you insist remember
> > that ridge vent is not open and has a fairly high resistance at the air
> > speeds a vent fan would be using so you would guess you would need a few
> > feet of vent in order to get something close to the efficiency of a
> > dedicated vent.
> >
> > I might add that most ridge vents I have seen have exposed wood surfaces
> > and that warm moist air would damage the wood deck. You would need to make
> > some accommodation for that as well.
> >
> > --
> > Joseph Meehan
> >
> > Dia duit
>
> I had not thought of the air flow resistance of a typical ridge vent -
> good point! Maybe that is why many posts on this topic do not
> recommend the somewhat common practice of simply stapling/hanging the
> fan's exhaust pipe near the ridge vent.
>
> I was just hoping to avoid putting a hole thru the roof to install a
> typical roof cap. I'm very handy, but I stay off the roof these days
> :) Guess I'll pay a carpenter to go up and do it :) Another option,
> if I want to do the work, would be to install a wall vent. At least I
> can get to that from the outside with a ladder. Easier for me to
> inspect/repair should it ever leak too...
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