Take advantage of these benefits

  • Log boiler from 40 to 170 kW for logs 50 cm and 1 m in length, with high operating convenience thanks to charging from the top
  • For the following fuels: logs, wood briquettes and residual wood as shavings or in pieces
  • Large hopper capacity (185 to 500 litres)
  • Efficiency up to 92 %
  • Accurate temperature stratification inside the heating water buffer cylinder by means of a buffer cylinder control valve – no possible disturbance of the buffer stratification through the return

The Vitoligno 250-S was developed specifically for the combustion of logs and represents the very latest in combustion technology.

Integral heat management

The Vitoligno 250-S was developed specifically for the combustion of logs and represents state of the art combustion technology. The Vitoligno 250-S log boiler has already stood the test in thousands of applications. Charging from the top means easy handling, control via the Lambda probe guarantees low emissions and the integral heat management system ensures maximum convenience.

Clean and efficient combustion

The microprocessor controller records all data relevant for operation and regulates heat distribution. As a result, the boiler system is continuously monitored in all operating phases, from heat-up and operation under load, right through to burnout, and is held within its optimum operating range by motorised air dampers. This guarantees clean and efficient combustion.


Extension kits (accessories) can be used to incorporate heat consumers or DHW cylinders into the control system. The Vitoligno 250-S is suitable for use in detached houses, apartment buildings, agricultural applications or commercial operations.

Large hopper

Thanks to its large charging chute, the Vitoligno 250-S offers great convenience during heating, whether with logs, wood briquettes or wood remnants, either in pieces or loose. Log boilers with a rated heating output range of 40 to 75 kW can be charged with logs of 50 cm in length. In the 85 to 170 kW range the hopper width increases to 1080 mm, allowing convenient charging even with logs of 1 m in length.

With oil burner connection

The Vitoligno 250-S is approved for operation with an oil burner and the necessary connections are available. Adding an oil burner may, for example, help to bridge holiday times when manual charging with logs is not feasible.

Remote control with touchscreen

With the Vitotrol 350 touchscreen, the wood gasification boiler can also be controlled from the living space. With the 5" display in 16:9 format, operation could hardly be easier. The Vitotrol 350 wall mounted device enables remote control of the boiler with all the necessary adjustment, displaying all relevant information about the boiler and the heating water buffer cylinder.

The Vitotrol 350 is more than just a remote control unit, it can also expand the system to include up to 20 additional control extensions (heating circuit, DHW heating) in a single device.

Product cross-section


40 to 170 kW
up to 93.2 %
Energy efficiency class
A+ (to 60 kW)
Logs (0.5 and 1 m long), wood briquettes and waste wood, either loose or in pieces
Application range
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Detached and two-family houses, apartment buildings, commerce, municipal offices, new build and modernisation projects
Weather-compensated control
DHW heating
Additional DHW cylinder(s) required, resulting in a high level of DHW convenience
Additional features
The Pyromat ECO is also approved as an oil boiler compliant with EN Standards; the necessary connections are already in place.


A perfect match – System technology

"The whole is greater than the sum of its parts". Following this philosophy, Viessmann supplies more than high quality, reliable and effective heating components. In fact, all products are part of a matching total concept, where all components complement one another. After all, only perfect interaction between all system components can draw out the maximum potential of our innovative leading technology.

Viessmann system technology incorporates everything you need for a reliable and economical heating system: From the Vitotronic control unit with wireless remote control, powerful Vitocell DHW cylinders for the highest DHW convenience, right up to high grade solar thermal systems for cost effective central heating backup.