With an old, shot masonry chimney that is not safe, I would like to rebuild the entire fireplace using a steel thimble. What is used for the actual firebox area? Is there an insert that is rated for wood and can be installed into the masonry firebox area?
After this, I assume one can install a steel thimble on top of the box and connect a steel 8"? flexible pipe system with chimney cap, similar to the kits I see for wood stoves.? What kind of insulation is required for the pipe? The existing chimney is large, square, and a straight shot up to the roof. Currently is has no chimney cap.
Sounds like a lovely way to restore an old, grand wood-burning fireplace.
Do the "thimbles" have flue open/close functions? I would like to avoid having to use a glass door cover...