2006 New York Code - Chimneys For Industrial Or Municipal Incinerator Plants.

 
    §  27-877  Chimneys  for  industrial  or municipal incinerator plants.
  Chimneys  for  central  incinerator  plants  shall  be  constructed   in
  accordance with the requirements for:
    (a)  Medium temperature chimneys if the incinerator is provided with a
  heat recovery unit or other means to assure a flue gas  temperature  not
  in excess of one thousand degrees Fahrenheit at the base of the stack.
    (b)  High temperature chimneys if the incinerator has no heat recovery
  unit or other means to assure a  flue  gas  temperature  less  than  one
  thousand degrees Fahrenheit.