I saw something pretty amazing recently, but I can't really afford to buy one. If you multiply out the "financing" option it runs at nearly $20,000 to buy the so called "Classic Edge Titanium HDX" model. Just listen to the marketingvideo - it really seems AMAZING though:
Looking at it more closely, it appears to really be an active forced downflow directed rocket mass burner:
The science and engineering behind this seems to be reproducible and probably is just generally rocket stove tech with some additional airflow control. To be honest, I don't like the electrical component that controls airflow level, but if I needed to, I could build this myself with an electrical engineering background.
Rocket stoves and mass heaters are often distinguished from other gasifires by their reliance on natural draft.
This seems to be a forced down draft gasifier.
That being said, it's very interesting, seems to have potential.