Are you contemplating running the fuct through the living space? At the wall/ceiling intersectiong?

Are you looking for info on building an enclosed soffit at the wall/ceiling that will hide the duct?

If this is on a first floor, you can go down into the basement, then run the duct between joists to an outside wall.

If you have accessible attic space above, you could also run the vent into the attic then horizontally out through a gable wall.

Just thought I'd toss those ideas out as well, as I prefer minimal holes in the roof.

Mongo