Project meeting of STEP at the site of the company ATS - Agro Trading & Solutions in Hardegsen (Photo: DBFZ)

Heat Biomass furnace

Project ID 03KB124

EmiLy - Low-emission pellet boiler

EmiLy pellet boiler 150kW, section (Source: Hoval)


  • 01.07.2017 – 30.04.2020


Hoval GmbH
Humboldt Straße 30
85609 Aschheim-Dornach

Thomas Uhle – project manager
Telephone: +49 (0)89 922097-0


03KB124B - IZES gGmbH
  • Address:
  • IZES gGmbH
    Altenkesseler Straße 17, Geb. A1
    66115 Saarbrücken
  • Contact:
  • Dr. Bodo Groß – project leader
    Telephone: +49 (0)681 844 972-51

Associated partners

Cooperation partners



  • Final Report is available only in German (switch to the German version of this website)
  • Scientific Paper: Schulte S, Heinzle J, Groß G (2020): Reduction of Particulate Matter Emissions from a Pellet Boiler Using Primary Measures, DOI:


The main objectives of the “Energiewende” can be reached by increasing the use of renewable energy sources, in particular in the flexibility of their utilisation and application possibilities as well as in the increase of the overall energy efficiency of the used technologies. Particularly with regard to the partial aspect of the "Wärmewende", it is indispensable to open up new or currently only subordinate used energy sources or resources. In addition to class A1 pellets, according to EN ISO 17225-2, this includes especially wood pellets of the classifications A2, B, I1, I2 and I3.


The EmiLy project involves the construction, research, experimental development and validation, as well as the further development and optimisation of an energetically efficient, compact, ecologically sustainable and at the same time attractively priced pellet boiler with 150 kW heat output.
The main focus of the project is the consistent use of pellets, in particular the classifications A2, B, I1, I2 and I3, according to EN ISO 17225-2 as well as on the overall efficiency increase and emission minimisation of the pellet boiler especially in its partial load operation.


The measures within the work packages are closely linked with the work of the project partner IZES. The specific tasks of the Hoval GmbH are primarily in the area of the construction and operation of the test boilers.

The measures within the work packages are closely linked with the work of the project partner Hoval. The specific tasks of the IZES gGmbH are primarily in the area of the scientific follow up and monitoring of test units. This includes the data storage, evaluation and interpretation of the measured data. 



  • Construction of the EmiLy-Boiler
  • Operation
  • Optimisation


  • Data storage, evalluation and interpretation
  • Scientific follow up and monitoring


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