Hey everyone I have a question for the experts on here. My wife and I recently bought a 1900's single level farm house that had been added onto in the early 80's. When the previous owners added on they installed a wood burning zero clearance fireplace upstairs and a large earth stove downstairs. These sit practically on top of each other but have separate chimneys. The zero clearance burner is absolutely worthless. It is supposed to burn with the glass doors shut by pulling outside air through a pair of vents and then just cycle the inside air around the fire box. The p/o did not opt to install the blower in the fireplace to really circulate the air and I cannot find anybody that still carries them. Not to mention the burn time is very poor. So my options at this point is to continue to use the downstairs earth stove, which is very inefficient and a pain to haul wood to or maybe replace the zero clearance. The current zero clearance is "stoned in place". So cannot be removed completely. I can however disassemble it leaving a rough opening around 28" wide and 30" tall. The current stove pipe is 8". My main question is can I dissassemble the current zero clearance, and replace with a wood burning insert with a 6" stainless liner run up through my old 8" pipe?