[Stoves] Wood fired, two-stage gasification employed

[Boll, Martin Dr.]

Crispin,

There is another two-stage top to bottom burning room-heating-stove. I saw
it some years ago here in Hatzfeld-Reddighausen, Germany, in the show-room
of the producer. 
It has natural draft! 
The website is in German, Swedish and Polish, not in English. But the pages
on bottom have pictures and short technical terms.
It is certainly even eco and bio but they do not make so much music about
that. 
http://www.xeoos.de/technik/umwelttechnik.html

http://www.xeoos.de/technik/brenntechnik.html

- Interested in your meaning -

Kind Regards
Martin