I am wanting/hoping to get a wood furnace at tax time and need info. I am going to put the furance in a small shed bc i do not have room in the manufactured house(2000 plus feet). I am planning to have the shed size between 6x6 to 8x8 not sure yet. The place will be at the end of house with a height of about 15 ft(house is). What i want will be something like a outside wood boiler. How high will the chimney need to be? So far the furnace will be a United States Stove Hot Furance new,have looked for used but can't find anything yet. A neighbor did this so i want to also. I can not do a outside boiler bc of the money $5000.00 to 8000.00 if not more.