Gene Arnold on wed 22 aug 07
It is now time to put the chimney on my 40ft MFT kiln. I plan to use the =
spiral pipe with the fiber flue liners. I am also using the double =
venturie type exit flu as described in Nils Lou's book. I have 3 sets of =
plans and each one has a different chimney height 12ft to 16ft.
Is there a way to figure how high the chimney should be to work =
properly. Or is there some kind of formula to use to figure the correct =
height???
Does anyone know the best and or the cheapest place to order the fiber =
flu liners??? Is one brand better than another???
I also removed the top of my kiln, scraped all the slip off the bricks =
and reinstalled with only a thin layer of slip. The kiln looks much =
better inside now. Thanks to all who responded with help.
=20
Gene & Latonna
mudduck@mudduckpottery.net
www.mudduckpottery.net
John Fulwood on thu 23 aug 07
Gene,
If you are firing with propane, you do not need a 12 or 16 ft chimney. I have a 50 cu/ft sprung arc downdraft and my chimney is just above the arch. From there, there is a 6 inch gap and then my exhaust duct to take the heat out through the roof of the studio. I fire with 4 eclipse burners at 4.5 pounds of pressure. The pressure creates a forced draft so the chimney does not need to be so high. I know it is not what Fred says about chimney height, but it works great for me. The chimney is 9x9 inside and I fire with it open 4 inches, closed to 2 1/2 for reduction.
good luck,
john fulwood
-----Original Message-----
>From: Gene Arnold
>Sent: Aug 22, 2007 4:48 PM
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: chimney how high?????
>
>It is now time to put the chimney on my 40ft MFT kiln. I plan to use the spiral pipe with the fiber flue liners. I am also using the double venturie type exit flu as described in Nils Lou's book. I have 3 sets of plans and each one has a different chimney height 12ft to 16ft.
>
>Is there a way to figure how high the chimney should be to work properly. Or is there some kind of formula to use to figure the correct height???
>
>Does anyone know the best and or the cheapest place to order the fiber flu liners??? Is one brand better than another???
>
>I also removed the top of my kiln, scraped all the slip off the bricks and reinstalled with only a thin layer of slip. The kiln looks much better inside now. Thanks to all who responded with help.
>
>
>Gene & Latonna
>mudduck@mudduckpottery.net
>www.mudduckpottery.net
>
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John Fulwood
Kissimmee River Pottery
One 8th St. #11
Frenchtown, NJ. 08825
http://www.kissimmeeriverpottery.com
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