• 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 skip experiences global resources cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • Pearl Sutton
  • Mike Haasl
stewards:
  • paul wheaton
  • Joylynn Hardesty
  • Dave Burton
master gardeners:
  • jordan barton
  • Greg Martin
  • Steve Thorn
gardeners:
  • Carla Burke
  • Jay Angler
  • Kate Downham

8” system with 6” hole in cieling?

 
Posts: 75
Location: North Idaho at 975m elevation on steep western slope, 60cm annual precipitation, zone 4
2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Anyone have experience? I know you can do this with normal wood stoves. The previous owner did stuff I need not explain but basically secured that only a 6” pipe can go through the cieling, but I want an 8” system. Will it work? How much vertical draw will I need for the transition to not throttle it and back draft?
 
gardener
Posts: 3232
Location: Southern alps, on the French side of the french /italian border 5000ft elevation
153
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
If you search well, there is a subject about the exact same situation, may be two years old. Or more.
 
gardener
Posts: 3641
Location: latitude 47 N.W. montana zone 6A
979
cat pig rocket stoves
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Planning on doing that this summer.
 Replacing my old standard double barrel stove in the shop with an 8" J tube and a double brick bell. It will have a 20' rise up to the roof with most of it being 8" but the roof has a 6" metal bestos chimney so reduce to 6" for the last 2'.
I know that Matt Walker and others have done this.  I expect/ hope for , no issues with it.
 
gardener
Posts: 3111
Location: Upstate NY, zone 5
152
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You would want a smooth, gradual reduction to reduce the throttling effect. I would say that an 8" to 6" reducer 6" long would probably be enough.
 
Posts: 6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
This thread describes a J type rocket where the flu goes down from a 8" to 5" before it exits the house:
http://donkey32.proboards.com/thread/2439/tell-burning-clean
gift
 
Rocket Mass Heater Manual
will be released to subscribers in: soon!
reply
    Bookmark Topic Watch Topic
  • New Topic