(under the class definition) Vessels particularly designed for concentrating liquid material by evaporation and not provided with means to prevent access of the atmosphere to the surface of the liquid.
SEE OR SEARCH CLASS
126, Stoves and Furnaces,
373, for similar heating vessels to heat water for domestic or cooking purposes.
210, Liquid Purification or Separation,
175+, for a heater or heat exchanger in combination with a separator.