Although this is not really answering your host question, I'm hoping
that you can anser this question on rocket heaters.
Can you use any other fuel in rocket heaters other than wood?
I'm thinking about growing duckweed as a fuel. Have not been able
to find out how to make the duckweed into pellets to burn.
Hopeing that it is possible and can be used in the rocvket heaters.
What is your opinion on this?
subject: Rocket Mass Heaters, Ernie and Erica, July-Aug 2012?