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Super sucker without welding?

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Has anyone ever made a super sucker hood without welding?  I'll get a welder one of these days, but today isn't that day, and tomorrow isn't looking good either.  It would be easy enough to put it together with screws, bolts, or rivets, but I'm wondering about air tightness.

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Greetings Nick.

        A few small leaks would not be a problem at all . The volume of hot gasses going up creates a vacuum that would suck air in rather than exhaust out.. Another seam for sheet metal is called a drive . Google it.. HAVE FUN AND GOOD LUCK


Forge on and make beautiful things 


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Not a problem Nick, any of the above methods work just fine. Heck, you can just run the stovepipe in on a horizontal run close to the fire and call it good. Screws, rivets, pop rivets, folded seams, solder, muffler tape, be creative it only has to direct smoke. 

Frosty The Lucky.

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