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The Vitotherm Duo-Block burner is a real workhorse. If you have special requirements concerning sound, NOx or power, the Duo-Block is there to take care of it. Our Duo-block burners are composed out of two units, connected by an air duct to transport the combustion air preheated in the burner unit towards the fan unit.

Key benefits of this setup are that the fan can be installed flexibly, which helps to significantly reduce noise levels in the boiler room. The burners are designed in close cooperation with the boiler or drum manufacture to ensure a perfect fit.


Burner manual and electrical drawing in English language.

Control Panel (Lamtec, Autoflame or Siemens).

Computer interface.

Frequency drive Danfoss.

Gastrain Siemens.

Low water probe.

Oil pump when burner is dual fuel (HP).

Safety chain condenser in burner control panel.

Safety chain external water level protection in burner control panel.

Set with boiler thermostat max temperature, Pt 100/Pt1000.

When optioned modulating oil, leak tray and buffervessel are included.


The complete burner is CE/EAC/CSEI certified.

Performance data

** Based on caloric value of 31,65 MJ/nm³ Hi.

** All other gasses on request.

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