Hi everyone - my name is Bill, and as you all may have guessed, I'm new here. I'm setting up my forge, and have run into a crossroads of sorts on how to proceed. I'm trying to decide which size and set up I should go with to vent my hood. I'm on the fence on whether I should go straight up through the attic space, and out the tin roof, or make a 90 degree out the wall, and then up to appropriate height. I'm also not certain on pipe diameter... Six inch, 8 inch? I've been pouring through information both here, and around the internet, and I'm seeing conflicting opinions. Attached are some pictures of my set up. I welcome any and all information. Thanks for reading, and glad to be here!