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["Franklin W. Davis" <knarfme AT comcast.net>]

  Hi all...does anyone use the "MagicHeat" heat extractor...the one that is 
installed in the stove flue/pipe line to the chimney? It looks like it is one 
of the best investments I have made in awhile...:-) It really pulls out alot 
of the heat that would otherwise be lost up the stack. Thermostat controls 
when it comes on and shuts off...pulls out anywhere from 8000-to-30000 btu's. 
Would be interested in hearing if anyone else uses one...Franklin
>From genegerue AT ruralize.com  Tue Nov 20 10:40:29 2007
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From: Gene GeRue <genegerue AT ruralize.com>
Date: Tue, 20 Nov 2007 08:38:52 -0700
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Subject: Re: [Homestead] MagicHeat
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On Nov 20, 2007, at 8:29 AM, Franklin W. Davis wrote:

>   Hi all...does anyone use the "MagicHeat" heat extractor...the one
> that is installed in the stove flue/pipe line to the chimney? It
> looks like it is one of the best investments I have made in
> awhile...:-) It really pulls out alot of the heat that would
> otherwise be lost up the stack. Thermostat controls when it comes
> on and shuts off...pulls out anywhere from 8000-to-30000 btu's.
> Would be interested in hearing if anyone else uses one...Franklin

I have zero experience with it. I would expect heat extraction to be
good but chimney soot buildup to possibly increase. The heat-up-the-
chimney dilemma has always been: enough to keep the flue clean but
not waste heat.

Does anyone know how the European design mass masonry heaters manage
to have that super-hot burn and then labyrinthine flu gas passage
without flu buildup? The only thing I can figure is that there is
such complete combustion that there is little left to gunk up the flu.