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Posted by Jamie on June 15, 2006, 3:43 pm
Speedy Jim wrote:
> Jamie wrote:
> > I had a new furnace installed last fall, and it turns out they didn't
> > set the fan to the right level for my A/C so it was blowing the
> > condensed water up into the ducts in the ceiling which was subsequently
> > raining down into my basement. In trying to find the source of the
> > problem, I had to remove some of the duct metal immediately downstream
> > (right furnace term?) of the furnace and immediately upstream of the
> > A/C coil unit.
> >
> > The guys that installed the furnace used the funky three-fold metal
> > joints on all sides but then sealed it all up with what *looks* like
> > plain old silicone goo. The tub & tile type.
> >
> > Now I asked at Home Depot and the one guy sounded very certain that
> > that wasn't the stuff - that I needed some other type of
> > construction-grade stuff. Said, "Oh no, you're dealing with *heat* and
> > so you need this stuff." Had a 700 in the name. PL700 maybe? It was
> > cheaper so I figured he wasn't trying to put one over on me. The tube
> > he pointed to had no temperature rating on it, and while it looked like
> > it would do the job moisture-wise, I didn't like the sounds of the
> > descriptions; it implied it was going to be hard to get off if I ever
> > needed it off.
> >
> > So I bought the silicone anyways. Says it's rated to 400F which I
> > seriously hope my vents aren't hitting.
> >
> > Anyone know if this is the right stuff? Or if there's anything better?
> >
> > Thanks.
> >
> > J
> >
>
> Rest easy. The max plenum temp won't be over ~140F.
> The silicone may off-gas for a week or so but after
> that it's inert.
Hey, that's great news. I'll finish that up this weekend then. Thank
you!
J
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