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Old January 9th, 2013, 08:00 AM
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I am building a new arch for a 2 x6.5 set of pans . I was told to use a 10" stack . Is there a rule of thumb for the stack height / stack diameter ? Thanks Tom
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Old January 9th, 2013, 08:24 AM
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Hi Tom,
Not really sure about the diameter, however have always been told the height needs to be
3x the length of the pan.
So I guess you would need a stack that is 20' long from the top of the arch to the top.
I would almost think 8" would be plenty big enough.
Just my thoughts, I am sure others will chime in here.

Dave
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Old January 9th, 2013, 08:40 AM
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When i built my arch i used a 8 inch stack. I sell Heatmor outdoor woodstoves and our largest residential model has a firebox dimension of 54 inches deep and 28 inches wide with air over and under fire ( 300 cfms ) it only uses a 8 inch stack and will produce 400,000 btu's. So why would i need a 10 inch stack on a firebox half those dimensions ? Personally i think 10 inch is overkill on a 2x6 arch. I reduced my 10 in stack base down to 8 inches because i wanted to hold the heat back and not allow it so much space to get out. Even with a 8 inch stack and a blower the roof on my sugarhouse looks like downtown Hiroshima in 1945 because of the ash by the end of maple season.
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Old January 9th, 2013, 08:42 AM
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Tom,

I just took del of a new 2x8 inferno evaporator from leader and they sent a 10 inch stack twice as long as the evaporator.The base stack is three feet high so that would make the total stack height 19 feet from the top of the arch.I also looked in leaders cat and it shows a 7 inch as well as a 10 inch stack used on a 24 inch wide arch.Maybe they use a 10 inch on the inferno because its an air tight.don't know for sure.Hope this helps a little.
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Old January 9th, 2013, 08:56 AM
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8" is fine. Cheaper as well if you go to 10" Its harder to get. 8" you can get anywhere. I have that on mine works just perfect with a 2x6 without forced air. Adding air to it this year in a few hours actually. but yes agreed ash will be everywhere!!! Extra fertilizer outside for the weeds inthe summer!!!
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Old January 9th, 2013, 06:46 PM
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I am not sure of any size, but I installed the stack that came with my evaperator which was about 12' and added another 4' to stop the smoke from entering my coupala. It like to roll down and in. Keep it high.
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Old January 9th, 2013, 08:09 PM
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Quote:
Originally Posted by Tom-saw View Post
Is there a rule of thumb for the stack height Thanks Tom
Are you using a blower ?
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Old January 12th, 2013, 07:56 AM
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I am going to use a 5" , 3 speed blower off of a Jen-aire cooktop stove for a blower for the AUF .Thanks for all of the replies .
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Old January 12th, 2013, 08:02 AM
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Tom,
I'd go with 6"
I have 6" and it works great
Also have an AUF blower too.
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Home Design 100 gph Reverse Osmosis
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Old January 12th, 2013, 09:05 AM
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I have a 2x6 with AUF, and it has stainless 10inch stack on it. Rule of thumb from what I'm told is double the length of arch/pans for stack height. Mine is either 12or13ft of stack, cant remember, and yes keep it hight up if you have a coupola, you dont want ash back inside.
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