thomas rubino wrote:Hi Leif;
The best book on rmh building is the (RMH builders guide by Ernie & Erica Wisner), readily available from them or thru Amazon.
thomas rubino wrote:
Here is a link to my recent build , 8" J tube into a brick bell ( permies.com/t/94980/Brick-Bell-Shop-Heater )
Plenty of other threads here , with brick bells using a batch box design.
A Bell design system allows you to utilize small or odd shaped areas and still gain maximum heat retention.
thomas rubino wrote:Hi lief;
The RMH core itself will need to be on an insulated surface. The bell not so much. 4" of insulated cob on the floor under the core will keep that heat going in the right direction. Or bricks and cement board can be used to raise the core up for air circulation underneath.