In the typical winter here I burn between a thousand and twelve hundred cubic feet of firewood to heat my house. Of course I have tried to think of ways to make useful producer gas from all that combustion but haven’t really made a crack in that nut. The main problem with producer gas other than to run IC engines is that it is very hard to store quantities of the stuff for things like cooking or perhaps clothes drying. I would definitely like to see someone develop a viable system but so far storing heat in either water or some other medium is the best I’ve done.
I think much of Vitally’s work is related to this idea and I would go back through the threads and look at things Joni has developed.