With very fine grain fuels auger systems or Kohlbach's patented dual fine metering system is used to load the system. With this the fine grain material, such as pellets, sawdust or chips, is fed from space-saving tall silos to the dual fine metering system via loading augers. A feature of this system is the cost-effective, yet robust and compact construction. This loading system is ideally suited to the Kohlbach K11 and K13 combustion systems.