It is a pellet grill which is forced air so a lot of those "facts" don't mean squat in this situation.I cant remember the exact number for a roof vent , but I want to say 18 " . You are trying to avoid a down draft coming over the high part of the roof . I'm not sure at what point the length of the vent affects the operation of the smoker itself . I think I would try going out the back wall with a larger diameter pipe . The larger pipe causes a lower pressure route for the smoke to seek , and keeps the original length of the factory stack . Maybe . Just thinkin ,,,but some facts behind the thoughts as well ..
Chop
It's about ambient air pressure coming off the roof . Down draft from the ridge , gable or eves being greater than the exhaust pressure coming from the smoker itself . I don't care if it's forced air or not .It is a pellet grill which is forced air so a lot of those "facts" don't mean squat in this situation.
You don’t have issues with smoke accumulation? I will be building mine off of the back of an existing shed. It will be about 10’x10’. Where it attaches to the existing shed it will be 10’ high and pitch to I would think around 9’. Whatever my BIL builds! I am using this as an example. Service door in short wall and windows in the long wall.Well I never noticed this post and I thought I did a good search before I made mine.
rmeugene , the window should work . I just have a pitch flat roof on mine with the front and back rafter
areas still open ( screened in to keep the critters out )
Not sure about the ceiling fan , if it would mess up the draw on your smoker or not without an upper vent of some sort .
What still roof are you doing
David
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No one has ever said " I built too big of a shed"!Better go big the first time.
I've completed it this summer and I'm really liking it, especially in poor weather! . With my current venting situation, the smoke that comes from around the lid does linger a bit, but most goes through the chimney and vent. Right now my vent is passive, but I used 6" pipe and down the road I may add an inline fan down the road.
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