#furnace  an enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc.
  supertype:  #chamber  a natural or artificial enclosed space
  subtype:  #blast_furnace  #cremation_chamber  #cupola.furnace  #electric_furnace  #firebox  #forge  #gas_furnace  #incinerator  #oil_burner  #tank_furnace
  part:  #grate.framework__grating  a frame of iron bars to hold a fire
  part:  #register.regulator  a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device

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