I've been toying with the idea of finishing the basement. The oil hot water system is already set up for a pretty easy install of a zone down there, but it might be cool to have a little wood stove down there. I don't think I would do the stove unless I could fit the chimney up the existing pipe chase. So the chase would have two wood chimneys and one oil chimney. Would this be allowed if they could fit and I guess I relocate all the interfering hot water pipe (see picture)? I imagine outside air would be required in some form, for either the oil burner or the wood stove. Thanks for any suggestions.