Karl Franzenburg

I apologize in advance for using the wrong terms. I haven't been able to find pictures or read descriptions about how the ducts in the mass part of the RMH actually connect to the steel drum, where all the heat comes from. Is it so painfully obvious to everyone else that it never needs mention? Where can I find this info?

Thanks much,

Karl

Is there someone in central Iowa with a RMH that would be willing to show it to me? I would like to see one in person if possible before I build my own.

Thanks,

Karl