Moved recently and planning new liner install in new house. Planning on running the 6” oval rigid duraliner since the clay is 8x13. Planning on running 18 ft of the rigid and 3 feet of the flex through the damper to the insert. The manual states that the flex liner wouldn’t need to be insulated if it’s below the first flue tile to maintain zero clearance , is this correct or would I still need to wrap?
Thanks
Thanks