Verdict: No soot, no creosote, only a little
ash from using
cardboard to start the fire. Laine was able to clean that up with an ash vacuum in no time.
We are quite pleased with the stratification chamber in the bench design. It heats so evenly over its 12' x 3' surface that it heats the room without getting much above body temperature. There are no hot spots to catch things on fire (like the Christmas tree). Just warm all over.
If you want to build something like this with me drop me a line at
info@unclemud.com for my schedule,
or
join me at the 2021
Rocket Mass Heater Jamboree October 2-10 at Wheaton Labs near Missoula Montana.
https://wheaton-labs.com/rocket-mass-heater-jamboree/?f=51