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The ENPlus Certification is a European-wide quality standard for wood pellets. This standard guarantees that the pellet meets certain minimum performance parameters such as calorific value (CV) and ash content.
The ENplus® quality certification is a major step towards establishing pellets as a widely used energy commodity. For the first time numerous national standards and certifications are replaced by one uniform system based on the ISO 17225-2 standard for wood pellets (previously EN 14961-2).
The ENplus® certification covers the whole chain for wood pellets – from production to delivery to the final customer, therefore ensuring high quality as well as transparency.The ENplus® quality seal stands for low emissions and trouble-free heating with high energy value. The ENplus® seal means that someone buying a boiler from either a UK or European manufacturer can be confident they are buying the right quality of pellet for their boiler.
The ENplus quality scheme was established in 2011 and has gained popularity rapidly in European heating markets. ENplus is very similar to DINplus in many ways, but has expanded the scope over the entire supply chain, including trader certification, and incorporates tracking for greenhouse gas emissions and sustainability. ENplus was a collaborative effort by several European countries under the Pellcert project and is overseen by the European Pellet Council, which is part of the AEBIOM European Biomass Association. ENplus is based on the EU standard for wood pellets (EN 14961-2) and is anticipated to reference the newly developed ISO wood pellet standards (ISO 17225-2) with the next draft. Due to a robust acceptance within European heating markets, wood pellet producers from North America that are reasonably accessible to export trade routes can find great value in certifying to the ENplus quality scheme. Within North American markets, however, ENplus has been slow to emerge.
| Property | Unit | ENplus-A1 Grade | Enplus-A2 Grade | EN-B Grade | Testing-Standard |
|---|---|---|---|---|---|
| Wood pellet diameter | mm | 6 or 8 | EN 16127 | ||
| Length | mm | 3.15 ≤ L ≤ 40 | EN 16127 | ||
| Wood pellet moisture content | % | ≤ 10 | EN 14774-1 | ||
| Ash | % | ≤ 0.7 | ≤ 1.5 | ≤ 3.0 | EN 14775 |
| Mechanical Durability | % | ≥ 97.5 | ≥ 96.5 | EN 15210-1 | |
| Fines ( ≤ 3.15 mm) | % | < 1 | EN 15210-1 | ||
| Net Calorific Value | MJ/kg | 16.5 ≤ Q ≤ 19 | 16.3 ≤ Q ≤ 19 | 16.0 ≤ Q ≤ 19 | EN 14918 |
| Pellet Bulk Density | kg/m3 | ≥ 600 | EN 15103 | ||
| Nitrogen Content | % | 0.3 | ≤ 0.5 | ≤ 1.0 | EN 15104 |
| Sulfur Content | % | ≤ 0.03 | ≤ 0.04 | EN 15289 | |
| Chlorine Content | % | ≤ 0.02 | ≤ 0.03 | EN 15289 | |
| Ash Melting Behavior | % | ≥ 1200 | ≥ 1100 | EN 15370 | |
(What needs to be added is, established in 2002, DINplus was the first wood pellet quality scheme to enter the market. It was established in Germany and early on gained much popularity in German and other European heating markets. DINplus wood pellets certification was originally based on the German DIN wood pellet standards, which gave it a very regional emphasis, but has since adopted the European Union standards for wood pellets (EN 14961-2) and is now also referencing the newly developed ISO wood pellet standards (ISO 17225-2). Still recognized today, DINplus pellets specification seems to be losing popularity to the development of the ENplus wood pellet quality scheme. )
| Property | Unit | DIN plus | DIN 51731 | ÖNORM M 7135 |
|---|---|---|---|---|
| Wood pellet diameter | mm | 4-10 | ||
| Length | mm | ＜5*D | ＜50 | ＜5*D |
| Wood pellet moisture content | % | 10 | 12 | 10 |
| Ash | % | ＜0.5 | ＜1.5 | ＜0.5 |
| Abrasion | % | ＜2.3 | / | ＜2.3 |
| Heat Value | MJ/kg | ＞18 | 17.5-19.5 | ＞18 |
| Heavy Metals | % | regulated | Not regulated | |
| Nitrogen Content | % | ＜0.3 | ||
| Sulfur Content | % | ＜0.04 | ＜0.08 | ＜0.04 |
| Chlorine Content | % | ＜0.02 | ＜0.03 | ＜0.02 |
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