So I am thinking of putting a free-standing wood burner on the ground level of my two story house. I have no basement. I am planning on running the chimney up through the inside of the house, passing through the ceiling of the first story then the floor of the second story then the ceiling of the second story then out the roof, for a total of about 18 ft I have a coulpe of questions. What is a safe distance I can place the chimney away from the walls I have read 9-10 inches, as I will probably frame in the part that is on the second story, as it will pass through my closet. Also what is a safe distance the ceiling and floor can be cut away for around the chimney I have read 2-3 inches? Any thoughs would be helpfull thanks in advance. also would it be wise to frame in the part that is in the attic to help it stay warm. planning on using at least double wall insulated pipe.