So I am looking at putting a wood stove in my basement and venting through the old brick chimney.  My question is what to do since the chimney has been removed from the roof and about a foot down inside the attic.  Is this where I would need an anchor plate?  Is there any reason I can't just run double walled, insulated a-vent straight up the chimney and through the roof.  Sorry for the dumb questions.