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Posted by z on August 17, 2006, 3:57 pm
EXT wrote:
> I have learned the hard way to avoid metal tubing, it is cold in winter and
> can produce a considerable amount of condensation. Now I only use 4" PVC
> sewer pipe, it is not as thick walled as drain and vent pipe and has belled
> ends for easy connecting. Since I changed I have not had any condensation
> problems. Also in my climate and because it runs through the attic I make
> sure that it is buried in the insulation for extra insurance, but so was the
> metal pipe that gave me problems.
I've heard it recommended to insulate the steel tube, but you had bad
luck with that. I used the flexi-insulated duct, which is really just a
tube out of fibreglass insulation with plastic outside and foil (i
think? been a while) inside. I stretched it out pretty good, so it
wouldn't have corrugations inside to trap the flow. I honestly don't
know if it condesnses in the duct or not, but don't ask, don't smell
seems to be working in my case.
>
> >
> > I'm curious, does your vent go through the roof or out the wall. I ask
> > because I installed a nice older one in our master bath from a
> > demolition salvage place that removes fixtures from high-end houses,
> > and I was careful to slope the vent tube down to the wall exit. I've
> > had no problems
> >
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