WardBurner@aol.com on fri 23 aug 96
Heather,
When I posted earlier, I was assuming you were using Natural draft or Venturi
burners. If you are, the formula posted below still holds true. If you are
using forced air, the chimney needs only be tall enough to vent out of the
building or shed.
The rule of thumb for chimney height is: 3 times the linear draw plus 1/3 the
interior height. So, if your kiln is 36 inches deep..., then you go through
9" of wall..., then another 9" to the back inside of the chimney, you have a
linear draw of 54". If your kiln is 48" tall, 1/3 of your height is; 16".
54 x 3 = 162 inches.....add the 16" and you get 178" or 14.8 ft.
You can share the back wall (make sure every few courses is "tied" into the
wall) with the chimney or have it set back a few bricks...Whatever works for
you. Since you're salting, I would go ahead and use hard brick.
My apologizes to the rest of the world that has enough sense to use the
metric system.....
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
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