Econoburn 150 in an outside shed. Should I go straight up through roof or horizontal through wall and then up? I am clueless when it comes to chimney pipe. I know econoburn calls out 24 gauge steel minimum but safety and $$$..............I don't have a clue. Any and all help is appreciated! Straight up I'm figuring 5' to roof and another 4' to clear peak. That's my preferred strategy. From what I've learned here vertical is better draft.