SB: SB: air Cooling tubes

[David Peabody <peabody@laser.net>]

I appreciated David's comments about cooling tubes. We are planning our
first system now, and I have had some concerns about mold.

We are looking for an appropriate pipe material for the 12" diameter
tubes we are planning.  The first thought was simple corrugated metal,
but the fact that there will always be standing water between the ridges
is troubling.  PVC is out for other reasons.  I'd appreciate others's
thoughts and experiences.

David Peabody
Peabody Architects
Alexandria, VA


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