rocket mass heater measurement

  • Combustion chamber height = 2 X pipe diameter / 4 X pipe diameter
  • Combustion chamber external cylinder = 2 inches higher than internal cylinder( higher will weaken the draft)
  • Raise pipe 1 in for every foot length

https://youtu.be/nZrW0v13BJI?t=3516 https://youtu.be/nZrW0v13BJI?t=3713

4 inches combustion chamber is good for home, taller combustion chamber gives clean heat:

https://www.youtube.com/watch?v=dSVKpAXlI7U

8 inches combustion chamber: https://permies.com/t/1740/rocket-stoves-tube-tube

The usual ratio of feed, tunnel, riser is 1:2:4. A clean burning rocket also depends on an insulated j tube.: http://donkey32.proboards.com/thread/1147/tube-specification