To remove the majority of incrustations in the fume side of heat exchanger you should:

  • Spray CLEAN F9 A
  • Let the product react from 10 – 20 minutes.
  • Brush and thoroughly rinse the whole surface with mains water
  • Spray CLEAN F9 B
  • Let the product react from 5 – 15 minutes.
  • Brush and thoroughly rinse the whole surface with mains water
  • If there are still some persistent deposits, make the burner work for 1 – 2 hours and check the results

To guarantee the best protection, we suggest to make this cleaning operation each year.