Here are a couple of pictures of my old Buck 21 installed in my parents new house. It originally was a fireplace insert using 8" double wall junk. I lined that and connected directly to the top of the stove for now. In the end it will have a Durock panel on top about 3 feet up and then the SS lined double wall will finish it out. Anyways, its keeping them warm and much safer than an open fireplace for now I will get pics of the completed install when I get it done.. BTW We did all the brickwork (as well as the rest of the housebuilding)...
Jason
Jason