DHW rebuild / insulation [RE-wrenches]

[Andrew Bortz]

Kirk,

Most commercially made flat plate connectors use a specialized
polyisocyanurate (hi-temp) foil faced rigid foam behind the copper.
The best scenario is the one that has a layer of white fiberglass (with
no binders so as to reduce out gassing) between the foam & the
absorber.  Finding these materials is the trick!

Andrew Bortz
Solar Design & Construction
solarman2 at attbi.com



----- Original Message -----
From: "Todd Cory, Mt. Shasta Energy Services" <toddcory at finestplanet.com>
To: <RE-wrenches at topica.com>
Sent: Friday, April 18, 2003 8:37 AM
Subject: Re: DHW rebuild / insulation [RE-wrenches]


> Commercially made flat plate connectors use foil faced rigid foam behind
the
> copper. If the panel does not stagnate, I could not imagine it melting. It
is
> good for insulating wet or dry and hard to think of something better for
this
> application.
>
> Todd
>
>
> "Kirk Herander, VSE" wrote:
>
> > Group,
> > I'm in the middle of replacing a bunch of leaking flat plate collectors.
> > They were built into the window bays of a pool house / sunroom, creating
a
> > homebrew framed collector. In taking them apart, the original installer
20+
> > years used rigid foam insulation, foiled on both sides underneath the
flat
> > plates and it partially melted down from the heat. What's a more
appropriate
> > insulation to use when I rebuild using new flat plates?
> >
> > Thanks, Kirk
>
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