In the FC series heat exchangers, the tube bundle consists of a high
  efficiency, finely wound copper tube wound in a spiral. This particular type
  of construction in addition to having extremely low water consumption, allows
  its use in cases of strong thermal "stress", having the beam freely
  expandable.
  
 

A correct technical choice and adequate flow rates of the fluids are primary conditions for the "long life" of the exchanger.
Each device is guaranteed against manufacturing or material defects for 12 months.
No guarantee against corrosion, excessive vibrations, water hammer, scale and incorrect assembly.