Don Campbell

could it have been because it was sitting directly on a cement floor ? the floor became a heat sink as well as pipes to close to the surface ?

Jay C. White Cloud, yes thank you for clarifying. The bridging effect is exactly what I was referring to. my concern was if it added to the thermal battery that it would cause my benches to change dimensions. I am at a loss at how to figure the wall with the battery when figuring duct length. I would like to have the bench in a L shape, with cob going up both walls. One wall exterior, the other interior. The wall would be thin only for decorative purposes. If it functioned as part of battery all the better !

Ive seen cob structures that flow into the RMH. Bookshelves , little alcoves ,etc. How do you keep this part from becoming part of the thermal mass? I know cob doesn't have any insulating abilities so it would it carry heat to it ? I want to put a cob wall against a wood framed exterior wall so I thought I could insulate the cob wall from the wood framed wall If needed . I also wondered if I could insulate between the cob wall and the thermal battery to keep the heat confined to the bench.

https://s-media-cache-ec0.pinimg.com/736x/79/40/31/7940312cc694bf14b452f4710ff91d69.jpg


If anyone could direct me to some info I would appreciated it.

I can definitely see the need for a removable top in that situation, I may pass on that idea just because I want it simple. I'm glad you guys are on the ball, lol.

First let me say hello to everyone ! I appreciate this site and all who contribute to educate and empower us with the knowledge found here. Thank you to all, I have been lurking for quite awhile learning as much as I can before starting my own project. On to my question ;

I was reading about using a RMH with the barrel combined with a bell. I know running the system out of energy by using too much of a battery, (heat sink) so that we get moisture and a stall is a concern regardless of the battery type. Can I use the amount of cob covering the barrel to fine tune or direct more heat into the battery, in the case of too long of runs or too much bell mass ?