I need to connect the 6 inch flue from a Jotul Castine F400 through an outside wall and then directly into an exterior masonry chimney (2 inches from building exterior). This is the only appliance that will be vented through this chimney. The stove will sit about 10 inches from Durock cement board with zero-flame stone, -- all anchored into the wall studs using 1 inch porcelain spacers. What do you suggest for a safe wall thimble and chimney connection (pipe)? I was thinking about the 6ITH by Industrial Chimney Company / Canada. Would that do it? And, what pipe should I run through it? Thanks guys.