The Vitoflex 300-UF wood boiler features high quality construction for use under the toughest conditions (high fuel flexibility from M10 to M50).
The inside of the combustion chamber is lined with pressed fireclay bricks with a high clay content for greater durability. All grate elements are high quality, heavy gauge chromium steel castings that can withstand very high temperatures.
A distinguishing feature of the Vitoflex 300-UF wood boiler is its proven three-pass heat exchanger, providing maximum heat transfer and exceptional efficiency.
The Vitoflex 300-UF wood boiler features state of the art grate combustion, from 390 to 1250 kW and is suitable for wood fuels with a maximum moisture content of 50 percent.
The moving infeed grate, proven combustion retort and sloping external grate in the Vitoflex 300‑UF optimally combine the benefits of infeed and underfeed combustion. A feed screw conveyor guides the wood fuel into the combustion retort, where it is pre-dried. The fuel is completely degassed on the external grate and the moving infeed grate. The wood gases are then burned with the aid of a regulated supply of secondary air.
The combustion technology of the Vitoflex 300-UF achieves low emission values (particularly for CO and NOx). Operation with modulating output control and the optimised combustion principle enables efficiency levels of up to 92 percent.
The rising cost of fossil fuels and growing environmental awareness are creating an ever increasing demand for renewable forms of energy. Today heating with wood is an environmentally friendly and economical alternative or addition to conventional heating systems for fossil fuels.
390 to 1250 kW
Permissible flow temperatures
up to 100 °C
Maximum operating pressure
up to 92 %
Pellets, woodchips (max. M50/G50), wood remnants
Large residential buildings, commerce, municipal offices, new build and modernisation projects
Fully automatic ash removal. Modulating output control from 30-100 %. Automatic ignition precludes the need for firebed maintenance and saves fuel.
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