I finally pulled out my old Lopi stove insert and am going to place in the room for more heat. I have a big stone fireplace and a stone chimmey. Where to put the stove leaves very few choices as the room is about 15' by 15' and things are crowded already. I have a propane furnace for backup which is connected to another chimmey. Were I want to put it is close to the old fireplace. When I run the stovepipe up thru the roof how far away must I be from the old outside chimmey so that it doesn't create a draft problem? I have a picture so you can see what I'm takling about. Thanks!