Bummer on 2 counts. Selkirk doesn't have any pipe that will extend the stove adapter, Plus While doing the math I would need to relocate the hole in the side of the shack. Looks like I'll have to go with the BioVent setup. That is within an inch of the PVP dimensions~ I need some feed back on the BioVent venting if anyone has some experiance. Hoping I don't need to start a new thread?.