Agnieszka Sadłos, P.P.H.KOSTRZEWA sp.j.

‘’KOSTRZEWA's Boiler Mini Bio was tested at an institute in the Czech Republic with Olimp fuel. The certificate confirms that the boiler, along with use of high-quality STELMET pellets, achieves perfect technical parametres: low emissions and high efficiency.”


Agnieszka Sadłos, P.P.H.KOSTRZEWA sp.j., Giżycko, Poland

Marek Rybarski, Polmark

The quality of pellets Lava and Olimp is outstanding and always constant. Our customers believe that the pellets from Stelmet are definitely better than the competition. In Poland, they have no equal when it comes to quality.


Marek Rybarski, Polmark, Wrocław

 Iwaszkiewicz Konstanty,  Ecostar

"Pellet Lava and Olimp: the first pellet in Poland which does not cause any problems!"


Iwaszkiewicz Konstanty, Ecostar, Zduńska Wola

Marek Górski,  Dolce Vita S.C

Among many products available on the market, the pellets from Stelmet positively stands out with its quality. The advantage distinguishing the pellet is also its packaging and bag colors that attract client's eye.


Marek Górski, Dolce Vita S.C, Białystok

Did you know...

You need a great deal more poor-quality pellets to generate the same amount of heat as high-quality pellets which come with a quality certificate.

The Olimp product was the first high quality woodpellet in Poland with the certification ENplus A1

Stelmet S.A. is one of Europe's largest manufacturers of garden landscape architecture, our experience and excellence in the use of wood can guarantee the quality and consistent heating properties of the pellets we produce.

Pellets can be used to heat large public buildings, such as: housing associations, hospitals, schools, kindergartens and swimming pools. They are also used in bakeries and pizzerias.

Pellets made of softwood may perform better than hardwood pellets due to their resin content which acts as a natural binder.

Every pallet-load of Olimp pellets is protected by a white cap through which UV radiation cannot pass, thus preventing our pellets from darkening.


To heat a single family house you need approx. 5-8 tonnes of pellets per year in the heating season. This rate of consumption depends on floor area, insulation and boiler efficiency.


By upgrading from an oil boiler to a pellet burner you can save in excess of 60% of heating fuel costs?


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