"is the pipe just beside your ducting for your fresh air?"
Was originally until it started sucking in exaustem steam, so now i open another window and taped over the other vent so it is closed now.
"small constructed hood from galvanized steel or something cheap like that to hang from the rafter then have the duct at the top going right out the window. Keeping it very simple hopefully."
would work great, you just need something to "catch" the steam and then have the fan suck it out, I have tried several fans and eventually settled on this one, regular low grade range hood wasn't enough, had a squerel cage from a range hood that just wan't enought, the one in the picture is the current setup, 440-450 cfm, works well so far, used it for a couple of brews.