• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies living kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • raven ranson
  • paul wheaton
  • Jocelyn Campbell
  • Julia Winter
stewards:
  • Burra Maluca
  • Devaka Cooray
  • Bill Erickson
garden masters:
  • Joylynn Hardesty
  • Bryant RedHawk
  • Mike Jay
gardeners:
  • Joseph Lofthouse
  • Dan Boone
  • Daron Williams

maximum height for Rocket Mass Heater riser?  RSS feed

 
steward
Posts: 3410
Location: woodland, washington
87
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
my impression is that, generally speaking, a taller riser is better. but I imagine there's a point at which this is no longer true.

so, supposing the riser is well insulated, at what point does making it taller stop increasing performance?
 
                            
Posts: 18
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
sounds like an experiment waiting to be done by you . I can't remember if it was on this site or another but 3:1 (rise over run) was better than 2:1 and 2.5:1, so I guess your starting point can be from there.
 
tel jetson
steward
Posts: 3410
Location: woodland, washington
87
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
current project is close to 4:1. seems to be working well, but I didn't try any other arrangements. that probably doesn't add much to the stove discussion, but it's one data point anyway.

unfortunately, I don't have a lot of material around for experimenting. or time. maybe someday.
 
Note to self: don't get into a fist fight with a cactus. Command this tiny ad to do it:
Free Tool Giveaway---hori hori knife, pruning shears & more!
https://permies.com/t/90826/Free-Tool-Giveaway
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!