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second bell alternative

 
pollinator
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Location: Victor, Montana; Zone 5b
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Anyone experiment with increasing the horizontal flue run to say 14" on a short bench run rather than using a secondary bell? Basically the same thing, just thought I would see if anyone had done something like this. If you had an 8" system that ran six feet, switch to 14" ducting for a yard or so, then switched back, would it perform the same as with a bell? I've only ever built a standard 8" without any secondary bells so this it outside my experience.
 
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Something along those lines?

http://s65.photobucket.com/user/mremine/library/NYC%20Rocket%20Stove%20Build?sort=3&page=1

 
Daniel Ray
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Thanks for the link. I've seen the NYC Rocket Stove build in the forum before and is probably what made me think of using a larger diameter just recently, I just couldn't place where I had seen it or if I had dreamed it instead. Thanks again. I'll post photos if I build
 
He puts the "turd" in "saturday". Speaking of which, have you smelled this tiny ad?
rocket mass heater risers: materials and design eBook
https://permies.com/wiki/188812/rocket-mass-heater-risers-materials
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