• 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 pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • Anne Miller
  • Pearl Sutton
  • r ranson
stewards:
  • paul wheaton
  • Burra Maluca
  • Mike Haasl
master gardeners:
  • John F Dean
  • jordan barton
  • Greg Martin
  • Carla Burke
gardeners:
  • Jay Angler
  • Leigh Tate
  • Steve Thorn

Fire Brick Question

 
Posts: 11
Location: Richland Center, WI
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
There ae many kinds of fire brick with different densities and chamistries and heat/cold cycle capabilities. Is there a "best" brick that suits the purposes of the fire chamber of a rocket stove mass heater? thanks, Mark.
 
Posts: 100
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
a fire brick will transfer the heat qucikly across the brick, preventing it from fracturing. I offer that a good brick for RMH would also be insulative
 
steward
Posts: 2482
Location: FL
113
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The hotter the fire is and longer it will be in continuous operation will determine what kind of brick you want. Low use, cool fires can get away with a light duty brick having a low alumina content. 30% alumina can do the job. Running it hot for months will need a higher alumina content in the 50% range or higher. The price goes along with the alumina content. You only build it once so I recommend a higher heat and alumina rating. Look for at least a 1500 degree rating.
 
Mark Heffernan
Posts: 11
Location: Richland Center, WI
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks, guys. That answers the question and establishes a good standard.
 
Yeast devil! Back to the oven that baked you! And take this tiny ad too:
Greenhouse of the Future ebook - now free for a while
https://permies.com/goodies/greenhouse
reply
    Bookmark Topic Watch Topic
  • New Topic