I was just getting ready to purchase 20' of the 6" Magnaflex Insulflex chimney liner for a fireplace install with a standalone woodstove. I called fireplacesnow to order the liner and the customer service fella indicated that this chimney liner can't be installed into a clean out tee. He indicated that the liner needs to connect directly into the stove. If that is indeed true, I need to rethink my installation. I was planning on installing the stove on the hearth and connecting the stove and liner to a clean out tee. I'm not quite sure if I would be able to "snake" the liner through the damper area and connect it to the back of a Hearthstone Heritage stove that is sitting outside the fireplace opening. Any idea's or comments from the guru's would be appreciated.