Boilers of the Hybrid line with mechanized burning of bulk fuel on the retort with lower fuel supply. Fuel from the fuel supply hopper of 1.3 m3 is fed to the retort with a screw conveyor and distributed over the grate bars where combustion takes place. To achieve the correct ratio of costs, the supply of primary and secondary air is regulated separately.
The boiler is made of thick-sheet steel, the firebox is lined with refractory brick, insulated with basalt insulation and faced with sheet metal with a polymeric coating.