• 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 permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • paul wheaton
  • Joseph Lofthouse
stewards:
  • Mike Jay
  • Jocelyn Campbell
  • Devaka Cooray
garden masters:
  • Steve Thorn
  • Dave Burton
  • Dan Boone
gardeners:
  • Joylynn Hardesty
  • Mandy Launchbury-Rainey
  • Mike Barkley

Side exhaust without vertical riser (i.e. no chimney)

 
Posts: 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks for hearing my novice question! Reading Erica and Ernie's wonderful book now, as well as doing online research, but can't seem to find explanation about basic chimney dynamics....
Why is an external, vertical chimney even necessary? I want to run the end of the heat exchange pipe (with downward pitch) right out the wall of the yurt, with no vertical riser.... shouldn't the cool, moist air readily flow out of the lowest point of the system? Why try to get it to rise vertically at all... I am new to the idea of "overdraft," but couldn't this be compensated for by putting a 90 or greater bend at the end?

thanks again,

Joe
 
gardener
Posts: 2989
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
129
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The downdraft condensation exhaust type has been attempted, to no avail. Nature of the mass, you can't get lower temps than the mass is at. So, if your point is to heat the yurt, you have exhaust gases hotter than ambient. These won't go down

https://en.wikipedia.org/wiki/Stack_effect

http://www.mha-net.org/docs/v8n2/wildac12b.htm
 
Posts: 60
Location: Michigan
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Build it with an upward pitch. The air coming out may not be totally cool. From all I've read you need to create the draft in some way. I know from experience in extremely cold weather it's sometimes hard to get a draft going.
 
What a stench! Central nervous system shutting down. Save yourself tiny ad!
permaculture bootcamp - learn permaculture through a little hard work
https://permies.com/wiki/bootcamp
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!