• 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

Ducting in pebble mass  RSS feed

 
Posts: 8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I just (mostly) finished watching all of 4dvd set ‘bwh’  It was awesome. But somehow I either missed or didn’t hear what the duct piping is inside of mass. I’m assuming I can’t buy hibachi ducting from Home Depot, but stove pipe seems like over kill. I read someone suggesting aluminum. Where would one buy that other than online?

https://www.google.com/search?q=6+aluminum+pipe+duct+hvac&sa=X&rlz=1CDGOYI_enUS774US774&hl=en-US&biw=375&bih=591&noj=1&tbs=vw:l,ss:44&tbm=shop&srpd=4866792618927279527&prds=epd:6874571121997822976,paur:ClkAsKraX-_yZqE2TfOZF-EGUv80RZOBodB8LYAdnUKjEFDKwL5H_L22CJxUfraNJ2rWwqXSIeZbWYI3rB6fcYIxduCB1YdRQjImQ6AX-BSDYFk57P4slAZU8BIZAFPVH72UQvQX2p5DWT5DxS9QIOsCG0VasQ,cdl:1,cid:15736563221099844753&ved=0ahUKEwiTwKvCn_LYAhXP0FMKHQeaCjUQgTYI1gQ

Could I use this flexible pipe?
 
gardener
Posts: 1455
Location: Ladakh, Indian Himalayas at 10,500 feet, zone 5
160
food preservation greening the desert solar trees
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
If the mass is cob, it can hold itself up pretty well once dry, so I think flexible ducting would work with cob. You'd probably want to stuff something inside the duct to hold it up during the cob process and drying. But if you want to use loose pebbles, then flexible ducting would collapse.
 
gardener
Posts: 1262
Location: latitude 47 N.W. montana zone 6A
114
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Ted; When you first leave the horizontal transition area , you use one stick of regular black stove pipe,  after that you switch to hvac pipe readily available in 5' sticks at home depot for around $11.00 each.  Use another stick of black pipe when you pop up out of your mass (high abrasion area) the back to hvac up to the roof.  If your chimney is all indoors you will not need insulated pipe until you pass thru your roof.      EDIT )   No flex pipe , the ridges inside resist the flow of hot air.
 
thomas rubino
gardener
Posts: 1262
Location: latitude 47 N.W. montana zone 6A
114
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi Ted;  Can I ask why you want to use a pebble mass ? Although an accepted build material,  Its not the best medium for holding your heat. 
 
machines help you to do more, but experience less. Experience this tiny ad:
Binge on 17 Seasons of Permaculture Design Monkeys!
http://permaculture-design-course.com
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!