Mud has now built several of these and they are working great. They have a ceramic fiber riser and firebrick wood feed. Most importantly, the whole core can be shipped. UPS will ship it for $30 to $90 depending on how far you are sending it.
At the appropriate technology course this year, this will be one of the things built. And anybody throwing $200 into the ring for materials can take it home - or ship it home.
There are still tickets to the ATC here: https://richsoil.com/atc.jsp
A very important thing about this core is that it comes with:
- a wood feed
- a burn tunnel
- a ceramic fiber riser (the best!)
- a manifold!
This core can be used in three different ways.
- as a shop heater (first pic) - very fast heat, no mass
- as a tiny house heater (first pic) - upper barrel is full of mass that is heated to 400 degrees
- a standard rocket mass heater (second pic)