I have been reading a lot about the RMHs the last few days and have not seen anything on the longevity of the stovepipe embedded in the mass if the heater. I am an HVAC mechanic for commercial and industrial equipment and have found that the steam and moisture given off by such a highly efficient burn tends to rot out galvanized sheet metal very quickly. I was wondering how people are dealing with this or if is even an issue. About how long do these heaters last with heavy use before they need rebuilding?
My YouTube channel:
Hi Jimmy; The pipe that we bury in the mass ,is carefully covered with cob so that when the hvac pipe rots out (it's expected to) , a smooth bore of cob will be there to replace it. How long does the hvac last ? I expect it varys from build to build, I would guess that within 5 years the pipe would start to disintegrate. The rest of the rmhshould last a good long time depending on materials and quality of construction.
Not all who wander are lost... J.R.R. Tolkien
Tick check! Okay, I guess that was just an itch. Oh wait! Just a tiny ad:
A rocket mass heater heats your home with one tenth the wood of a conventional wood stove