No, that makes perfect sense. Especially since the air is having to change direction at that point.
Thats a good point that I didn't consider because im not planning on installing a top grate. I put the supports in because I really didn't know what i was getting myself into lol.
I see what you are saying. Here is a top-down view of my smoke stack assembly with some dimensions.dacolson wrote: ↑October 20th, 2020, 12:06 amI think it looks fine with 6”. My only concern is that the 6” height may be a bit of an airflow restriction for the 8” pipe. I’ve thought a fair bit about this as this is my preferred stack configuration. As the airflow reaches the back of the collector, it’s getting more and more constricted before it hits your pipe. If your stack height is based off an 8” diameter, then I think the smallest opening measurement on the collector should be 8”. I’m sure I’m over thinking this but this is my take on collector opening height. Better to be larger than too small.
I think you make a great point. I think I'm going to stick with the 6" design.Cole Leffert wrote: ↑October 20th, 2020, 9:25 amI think physics is usually visualized best when you exaggerate the problem in both directions. Your exhaust creates your draw, works like a vacuum cleaner. So picture your exhaust like a vacuum cleaner hose with different ends (collectors) on it. Say you make the one end 3 inches tall instead of 6. There will be more resistance but you would pick up dirt (smoke) across the full width of the end. Now if you made it 10 inches tall there would be less resistance but you would most likely only draw dirt (smoke) from the center and not the full width. So I'm thinking the narrower (6") collector would draw in smoke from the sides better but still not have much resistance. Just my thought.
I am well acquainted with my weld eraser! This is my garage after all the work i did to get the doors to fit.