David Eaks : I AM NOT CRAZY! I went looking all over and used our search engine about every way I could think off ! The John Adamz Video I fully expected
to find in the RMHs in Greenhouses Extentions, because as you can tell from the picture, John was using the ground in his green house as a thermal
mass. If memory serves me right I believe he tore his apart to place insulation around the Burn tunnel to raise its temps a little more. He also offset his barrel
just to promote a smoother flow of air into the Transitional area, this was one of the 1st I ever saw using splits, 1/2 thickness Fire brick !
For the Good of the Craft !
Success has a Thousand Fathers , Failure is an Orphan
There is a diagram of the keyhole pattern positioned over the base pad brick layout, plus the combustion core and riser brick layout to boot, all on the proposed cover of E&E's upcoming book, Rocket Mass Heater Builder's Guide.
A high-rez image will be found at the top of this thread: