mechanical durability of pellets is specified in en 335, with determination by technical standard cen/ts 15210-1:2005.
the cen/tc 355 standards include detailed specifications for sampling and testing biomass fuel.
enplus is a unifying wood pellet quality assurance system based on the en 14961-2 standard for wood pellets. it was agreed upon by the european pellet council in january 2011. hetas is a certification body.
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