Ferroli OPERA 70 Instructions D'utilisation, D'installation Et D'entretien page 191

OPERA
4.3 Technical data table
The column on the right gives the abbreviation used on the data plate.
These boilers can work correctly with a minimum flow rate of 0 liters/h.
191
EN
cod. 3541R964 - Rev. 01 - 02/2022