[TheForge] Heat extracting chimney

[Peter Fels And Phoebe Palmer]

Larry: I've made several "sculptural versions". While they worked well, 
mo one was fond of the extra hardware..arty or not.
The thing about them is they tend to act like condensers unless you have 
a well tuned catalytic afterburner in the system.
So, build that sucker with the assumption that sooner or later there 
will be a secondary fire in there and the whole thing will turn red hot 
and sound like a jet engine. A lot of extra walls and vents and 
insulation and the like..gets expensive, time consuming and chimney 
sweeps will hate you.
Oh yeah, if the draw of the fp is at all marginal, you are a smoked 
smith..........Pete
Dragons Watch Forge wrote:

> While living in northern Calif the house we lived in had a roof 
> mounted furnace / air conditioner.  The furnace had such an efficient 
> heat exchanger that it required an exhaust fan for the burner side of 
> the unit.  The fan was plastic.
>
>    I wish to build a fire place and chimney that has a heat exchanger 
> in it that is this efficient.  Any one out there done this?  Any 
> sources of reference materials or plans that are available?
>
> Thanks!
>
> Larry
>
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