Win a copy of Bioshelter Market Garden this week in the Market Garden forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • James Freyr
  • Nicole Alderman
  • Anne Miller
  • r ranson
  • Mike Jay Haasl
  • Dave Burton
  • Pearl Sutton
  • paul wheaton
  • Joylynn Hardesty
  • Joseph Lofthouse
garden masters:
  • Steve Thorn
  • Dan Boone
  • Carla Burke
  • Kate Downham

RMH somewhat mobile I hope

Posts: 4
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi all

I'll begin to work with my rocket mass heater to replace my awful useless stove.

That is my 60cm (23") heat riser with inner diameter of 15cm (6").

It's refractory cement on rockwool tube

Please, can somebody advise me is J-tube better than L-tube for feed tube/burn tunnel compination?

It's easier for wood to burn on itself with J-tube but are there any other difference?

[Thumbnail for IMG_20191101_181818.jpg]
[Thumbnail for IMG_20191101_181838.jpg]
Posts: 434
Location: Penticton, Canada
building woodworking rocket stoves
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi Aki,  I think you have the main reason why people use a J tube instead of an L feed. Unless there are space restrictions, cultural preferences, or just want a certain look, I can't think of any other reason why one is better than the other.
Actually, now that I think of when I build an L tube long ago, I do remember liking that it was a bit easier to clean out the ash from the burn tunnel.

That's quite a 'meaty' riser you built for yourself. It will be interesting to see how long the rock wool will last. There is a video by Bigelow Farms (web4deb) where he used rock wool as a heat riser insulation and there were portions of it that were melted.
Try 100 things. 2 will work out, but you will never know in advance which 2. This tiny ad might be one:
permaculture bootcamp - learn permaculture through a little hard work
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!