USF-S
UNDERFEED PRINCIPLE FOR DRY FUELS - water content up to 35%
USF-S series wood-fuel boilers operate on an underfeed principle and are designed for an output of 100 to 300 kW.
Wood firing for any application
Not only can you fire your own waste wood, even with a high dust content, with wood-fuel boilers from ENDRESS but also chopped wood or pellets. Whether for joineries, saw mills, furniture industry or local authorities - our team manufactures all wood-fuel boilers to a high level of quality at the Burgbernheim plant. Our systems are suitable for any boiler room thanks to their clever design. They are also packed with user friendliness and convenience.

✔ Made in Germany
✔ Industrial standard
✔ Fuel class 4-7
Equipment
eat exchanger cleaning
The automatic heat exchanger cleaning saves material and ensures a consistently high level of boiler efficiency and infrequent cleaning intervals.
Underfeed combustion chamber
The combustion retort is a 15 mm thick steel construction with completely automatic ash removal and a standard ash container for convenient disposal. Self-supporting combustion chamber made from high-temperature ceramic cement. A 2-sided vented underfeed combustion chamber ensures efficient and clean combustion. Durable boiler housing with 10 mm wall thickness.
Grate bars
The grate bars of the underfeed retort are made from high-temperature-resistant cast stainless steel with a chrome content of 27%, guaranteeing a long service life.
Automatic ignition
In cooperation with a temperature-controlled ignition fan, a well-engineered ignition program makes heating up possible without degenerating the material.
Drives
Screw stoker and ash removal unit are driven by high quality geared motors made in Germany.