Improving

Fine

Improving the rocket stove, but I think I stick.
I can make it burn for a long time with my treat. But I need let it burn for 10 hours without my treat, and it have to be safety, as I do not want to burn whole green house.

I have improved to extend 3 times the heatwarmer for chimney. And using charcoal instead of bamboo.

However it still can not keep burning for a hour without care.