KWB Powerfire – wood chips / pellets

Our power package is one of the most compact heating systems in the 150 to 300 kW power range. The KWB Powerfire can be fired with wood chips or pellets and is perfectly suited for supplying regional district heating networks and larger buildings and systems (contracting). Scroll down for more information…




The Powerfire has a range of  150, 200, 240, or 300 kW. It is suitable for very large buildings, groups of buildings, and district heating networks. In this size of system, the payback period is particularly short. This means that the KWB Powerfire has the potential to be leased.

The "Energie Genie" (Energy Genius) and "Energy Globe Award" innovation prizes are proof of the high product quality of the KWB Powerfire.

Some of the features of the Powerfire are:

  • Compact rotary-grate combustion system
  • Cyclone combustion chamber for minimum emissions
  • Convenient 240-litre ash container
  • Extendible substructure
  • Full 10-year guarantee
  • Long service life and high resistance to wear of the screw, thanks to the stainless steel spirals
  • Maintenance-free, double-sealed heavy-duty gear
  • Low electricity consumption 
  • Optimal fuel transport to the heating system

The Powerfire needs to be carefully planned for each setting and situation. It is a powerful system, capable of heating huge areas.

Technology in detail


Quiet power package for safe heating

Innovative rotary-grate combustion system

rotary-grate combustion system

The rotary-grate combustion system is a unique system in which the fuel is pushed sideways into the pre-combustion chamber and conveyed onto a rotary grate.

The fuel is transported through the combustion chamber by means of grate rotation through approx. 270° before a special grate cleaning system handles ash removal.




Minimum power consumption

minimum power consumption

The KWB Powerfire features the lowest power consumption in this power class. This is achieved by the compact system design and by avoiding mechanical resistance in the area of the conveyor technology as far as possible.





Low emissions

low emissions

A sophisticated air duct with rotating flow ensures complete burnout, minimal emissions and the best possible removal of fly-ash particles in the downstream cyclone combustion chamber.





What counts is the solution as a whole

solution as a whole

For heating systems in this power range, expert advice is needed throughout the entire duration of the project. You can rely on your contacts at KWB to provide both up-front and follow-up support. We always have the solution as whole in mind, not just the heating system.





The ultimate in service friendliness


The overall substructure, including rotary-grate combustion system is easy to extract. This simplifies the work of service personnel and saves time and money. The full 10-year guarantee provides maximum security. External ash extraction into a 240-litre ash container keeps maintenance requirements low.





Remote maintenance

remote maintenance

The user-friendly KWB Comfort control platform provides the following extensions for reliable operation of your heating system:

  • KWB Comfort Visio – enables remote monitoring and remote operation
  • KWB Comfort SMS – enables operation and monitoring by means of SMS
  • KWB Comfort InterCom – enables data exchange with external systems




Installation Examples

KWB Powerfire wood chip and wood pellet heating system – installation examples

With larger systems in particular, we will be happy to use our planning experience to help you. We have already implemented countless installation variants; so we are certain that we can find the perfect solution for your needs.

Comfort Easy conveyor systems


Stirrer and ascending screw with upward transfer

stirrer with ascending screw and upward transfer

  • Best utilisation of the storage room volume
  • Ascending screw length of up to 3 metres possible
  • Ideal for square, rectangular and round storage rooms for pellets to 150 kW
  • Maximum storage room utilisation as a sloping floor is not required





Scraper floor fuel extractor

scraper floor fuel extractor

  • Stable and individually-planned
  • Ideal for large-area storage rooms
  • Optimum price/performance ratio






Conveyor systems for the KWB Powerfire wood chip and wood pellet heating system


Stirrer in standard version

stirrer in standard version

  • Stable conveyor trough design
  • Maintenance-free, heavy-duty gear unit – reliable and designed for a long service life
  • Ideally suited for square, rectangular and round storage rooms





Stirrer and ascending screw with downward transfer

stirrer with ascending screw and downward transfer

  • Long service life and high wear resistance of the screw due to stainless steel spirals in feed area
  • Ideal for level differences between pellet storage room and boiler room






The compact design of the heating system and the flexible storage systems of the KWB brand will enable your authorised KWB partner to find the perfect solution.

No matter whether you have a storage area for fuel or only a small space of a few square feet - no matter whether you are looking for maximum convenience, or would like to participate yourself to save costs: We can provide the right heating system to match you and your building's needs.