PYROLITHIC stoves

This video shows a couple of stoves.
Both uses thermal mass, and seem to be made from cementitious material.

The first one uses a top lit up draft core and runs on woodchips, nut shells, pellets etc.
They do not mention making charcoal , but by the very nature of these stoves it must.

The second seems to run on conventional firewood, and is more of a cook stove.
There isn't demonstration, but the they seem to be describing a top lit downward burning fire that doesn't need a grate beneath it.

Both are said to burn at high temperatures and cleanly.

I love the stove pictured. Very simple, attractive design, very efficient, small footprint. It burns to ash though.
I just made a similar one out of steel barrel and sheet metal as a test. I'm running it on pellets for now and still experimenting with cycle time to find the sweet spot when the pellets are fully converted to char and before becoming ash. I made a large ash pan at the bottom and I pull a stainless screen out from under the fuel tube to drop the burning coals into that then dump them into a bucket of water to quench. I'll change the design around in the next one and incorporate a water container instead of an ash pan to simplify that process.
I find these tlud's so much easier than j-tube or batch boxes in terms of achieving visibly clean burns throughout the cycle. I'm curious as to temperature differences between these and rockets, and what a gas analyzer would have to say about the actual noxious gas numbers though. Have any of you pros worked that out?

I think pyroLITHIC might be the wrong word? PyroLYTIC?

"...lithic" usually refers to rock.
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I'm a fan of TLUD systems, and have messed around with a few. They are pretty forgiving of feedstock, provided it is properly dry.  I'd be interested to see if someone can set one up to run through thermal mass bench. I think the geometry might make it challenging to get a good initial burn going in the right direction.

I like the idea of drenching it before it becomes ash.  Much better to make biochar out of it.  The timing has to be key.
John S
PDX OR

Good video.  Someone with skills in a cold climate, like you William, could make one of these as a practical form of heat for a room.  They said they were very common in E. Europe and Russia.  It would be great to use the biochar afterwards.

John S
PDX OR