[Greenbuilding] heating water with wood stove - heat transfer/efficiency calculations?

Reuben Deumling 9watts at gmail.com
Mon Nov 21 07:32:09 PST 2011

On Wed, Nov 9, 2011 at 4:10 PM, Frank Tettemer <frank at livingsol.com> wrote:

> >> What has worked well is a custom made double walled flue pipe, made
> from heavy stainless steel, and filled with water. The water column is
> three feet high, inner flue is six inch diameter, and the outer tube is
> eight inch diameter. Thus there is close to five sq. ft. of surface area,
> of the inner flue pipe in direct contact with the water. The heat exchange
> area is functional.

Hey, look, someone in Australia decided to commercialize your idea:
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