Heating and instant DHW with premix burner
Qn = nominal heat input in heating • Qnw = Nominal heat input in DHW • η30 = useful efficiency at 30% of the heat input
*The appliance is factory-set for Natural Gas G20 and can be set up to operate with commercial Propane G31 without replacement of internal components
* With boiler working in condensation return 30 °C
