Quote:
Originally Posted by Piwoslaw
A box will have very small surface area compared to its volume, so heat transfer will be slow. Maybe a few small boxes (or cylinders, made out of large diameter pipes), or another coil, plumbed parallel to the first?
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I think your very right on this. Found this tonight. Close to the middle of the page.
$1000 solar water heating system -- storage tank
Thanks.
Kevin