The original set, determined for Hercules U 26 boilers of all generations, serves for the boiler upgrading to the “new” automatic boiler Hercules DUO which meets parameters of the emission class 4.
The original conversion kit for boiler Hercules U22 (5 or 7 sections) designed for upgrade to "new" automatic boiler VIADRUS A0C.
The original conversion kit for boiler Hercules U28 (5 or 7 sections) used for upgrade to "new" automatic boiler VIADRUS A2C.
