Donald MacRae : Small hunting cabin you only should need a 6'' system to heat the whole place that would give you about 30 Vertical feet and You
are using 6 elbows per each 1/2 -
This has been tried and Always always always one of the two horizontal chimneys will dominate and the other chimney will not ' Draw '
New would-be Rocketeers need to view the
Rocket mass heater for what it is , not what it isn't - a Regular
Wood stove ! The idea of the Thermal mass
is to be located in the heart of your structure as close to your elbow as possible, this way tending the Rocket is an automatic function prompted by
visual and Audible clues, with no-more thought given to Tending it than you would take in adjusting a pair of reading glasses on your nose !
With a Central location and feeding for 1-2 hours to receive 20 -40 hours of heat is exactly like having a well endowed bank account that you make small
regular deposits of Short fine split wood and receive Automatic disbursements of Heat, soothing bone warning heat sit on it, put your feed up on it, or curl
up on it its always there, want a warm up on your
coffee its right there on top of your barrel that can be used for cooking too !
Here is a link to a RMH that is completely contained in the
footprint of the Rocket Burner base with Barrel and the
cob Thermal mass the size of a small
daybed / lounge and final vertical chimney your RHM needs will take about 3/4 of that space ! Link below :
https://youtu.be/Vddj8dOvtCg
For the Craft ! big AL