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-   -   how much room do I leave under the chimney cap? (http://www.fornobravo.com/forum/f9/how-much-room-do-i-leave-9213.html)

fornax hominus 11-30-2009 06:54 AM

how much room do I leave under the chimney cap?
 
Having started my MarkII oven a year and a half ago [and cooking in it steady for a year] I am now slowly getting the ''extras'' seen to , still no roof, but I put in a chimney before the heavy frosts . I welded up one from 12ga.steel 9''x29''x24''high. [inches]
I put it sitting above the oven arch with a 3'' smoke shelf to the dome side, and it's working great , but I want to put a cap on and am wondering as to the distance above .. I have been advised [by a woodstove designer] to put a 1inch steel band bisecting this space [to prevent cross winds from downdrafting] like most new woodstove chimneys . Is there a standard formulae for this?

shuboyje 11-30-2009 07:55 AM

Re: how much room do I leave under the chimney cap?
 
In a round stack it is 2/3 the diameter. Not sure about a rectangular but I will look into it for you tonight.


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