Most stoves go straight up thru the attic. Use the proper piping! Probably save as compared to up, bend, pipe out, bend and pipe up! Unless you have and obstruction in the attic. Roof jacks are cheaper than, metalbestos elbows, and eve hangers! As said before follow the building code, even if you forego the permit!
Wabi and this guy is right. I would add to make sure you use an insulation collar in the attic and a shingle collar with vent holes under the rain ring. Installation must be perfect. A plumb bob is your friend.
