Yes they share the same flue. They both have 12" insulated liners down through them the one that has the insert has a 6" liner through it also....
Thanks papadave! It's a older home and we did a lot to it in the 3 years we've been here. Hopefully next year we will upgrade from the Quad 2700i...
[ATTACH] [ATTACH] Hello all, I am new here and have enjoyed reading the threads! I loved looking at everybody's pics! Here is my set up