I read on different web. sites that if the oil boiler goes into chimney above wood boiler it be ok? [ htpp:WWW.InspectAPedia.com/chimneys/shared_chimney_flues_OK.htm ] ] And also wood boiler has to have its own air supply different from oil boiler? And the air has to be able to shut off Completely when running other boiler to not effect the burning or draft of the running boiler. The chimney would have to be cement block big enough for both if ever run together,[which hardly would happen] I can see how bad it could effect the draft of the boilers but if done right like i read should work ok from what i can tell? Or would it just be better to power vent oil boiler outside and leave gasser alone?