Ok we gave in and are moving our pellet stove, Enviro Omega, from the basement to the main living area of the house. We are going to connect it to the main chimney which is a huge stone fireplace going through the center of the house with cathedral ceilings. There are 6 flues in the chimney so the pellet stove will have its own flue. We have chiseled away the stone and have put a thimble in there. Will we need to put a SS pipe running up to the top of the chimney and cap it. The flue is 8" x 8" and clay. The height from the flue to the top of the chimney is 26'. Also will I need an OAK? ( I hate to ask that question...) Thanks for any and all advice and comments.