An innovative wood boiler with rotation combustion from 150 to 540 kW. For wood fuels with a maximum moisture content of 35 percent.
The Vitoflex 300‑RF wood boiler features a state of the art patented rotation combustion system. A feed screw conveyor continuously conveys wood fuel onto a moving grate, where gasification of the fuel occurs (with Lambda regulated primary air supply). Continuous gasification occurs under air starvation. Rotary fans mix rising combustion gases with secondary air that has been atomised and subjected to angular momentum. This ensures thorough mixing with the combustion gases.
The proven combustion technology of the Vitoflex 300-RF achieves similar emissions values to those of an advanced gas combustion system and keeps the release of CO, NOx and dust particles to a minimum, subject to fuel type.
The combination of combustion technology and digital modulating output control enables efficiency levels of up to 94 percent.
Vitoflex 300-RF wood boilers are available as containerised complete solutions for situations where there are no boiler houses available or where on-site building costs have to be reduced to a minimum. These ready-to-use solutions include a pre-assembled wood boiler inside a special container and all auxiliary appliances. Individual container solutions can be specially adapted to meet specific requirements.
The rising cost of fossil fuels, and growing environmental awareness have been steadily increasing the demand for renewable forms of energy. A wood boiler is a good alternative to heating with oil or gas. Alongside environmental considerations, there are also economic reasons for relying on wood. As an indigenous fuel, wood is very cost efficient and not subject to extreme fluctuations.
Viessmann wood boilers are highly efficient and economical in their fuel consumption. They are suitable both as the sole heat generator and as a supplement to oil or gas boilers. By installing a wood boiler, spending on oil and gas is reduced significantly so the boiler starts paying for itself almost immediately.
150 to 540 kW
Permissible flow temperatures
up to 100 °C
Maximum operating pressure
up to 92 %
Pellets, woodchips (max. M35/G50)
Apartment buildings, large residential buildings, commerce, municipal offices, new build and modernisation projects
Fully automatic ash removal. Digital modulating output control (4:1 control range). Automatic ignition precludes the need for firebed maintenance and saves fuel
With an output of between 390 and 1,250 kW, the Vitoflex 300-UF wood boiler features an exceptionally efficient three-pass heat exchanger. It is designed for wood fuels with a maximum moisture content of 50 per cent.Discover the Vitoflex 300-UF