One-piece, low-pressure overheated water generators with reverse-flame combustion chamber. Monoblock pressurised generators with three smoke passes of which two in the firebox, smooth tube bundles with stainless steel turbulators, for the production of overheated water. Running on diesel, gas, fuel oil. Complete with all accessories (except burner) ready for operation. The generator and expansion vessel are already prepared for installation of the 72-hour KIT Factory tested and verified by Notified Body as a certified assembly according to European Directive 2014/68/EU-PED By certifying generators up to an output of 1380 kW with a temperature of 120°, they will be exempt from licensed conductor