Pellet: quality and certificationsto evaluate the best biomass stove fuel. How to learn to recognize an efficient, clean and best-yielding Pellet.
Let's get to know thepellets, its returns and certifications to understand its yield.
Thepelletsit is a very popular biomass fuel. Obtained from the scraps of wood processing, those small cylinders are nothing more than dried sawdust residues, deprived of impurities and pressed to take that compact shape. There is no added glue in the pellet cylinders: the press causes the lignin naturally present in the wood to behave like a glue.
On the market there are different types of pellets, each with a different yield. Based on the wood essence that is used to produce it, the pellet can be more or less efficient.
It is important to point out that, in absolute terms, there cannot be a better pellet, however the quality and characteristics of the essence can make the difference.
Understanding which is the best pellet is not easy: you can start trying many different brands and observe which biomass burns best in your stove. In parallel, you can evaluate the various certifications of the reference product.
Like all products, thepelletshas alabelto be able to read. First of all you can read the barcode thanks to which you will be able to understand the origin of the raw material. Of course, this is not enough.
What to evaluate to choose the best pellet on the market? Here is a list of factors to evaluate but which is not always easy to grasp on the label.
- - the origin of the pellets, it is preferable that they come from factories that use only virgin woodfirst cut.
- - The raw material should be free from any kind of chemical adhesives.
- - Better to choose glossy cylinders, with a constant and reduced diameter. The ideal dimensions are around 6 mm. The smaller the cylinders, the more fuel will be able to enter the burner.
- - The residual ash produced should always be less than 1%, ideally it should be around 0.77%.
- - The quantities of chlorine should be low (0.02), they are indicated on the label.
- - Absence of sulfur (quantity found on the label less than 0.01%). The presence of sulfur could indicate the presence of plastics, additives or chemical compounds of various kinds.
- - Percentage of humidity which, ideally, should be around 8% or lower. Avoid buying pellets with a humidity higher than 10%.
- - The calorific value is a crucial factor in determining thebest pellet.An optimal quota is around 4,700 - 5,000 kcal / kg.
- - Choose pellets in unopened packages.
- - Take a look at anycertifications.
Pellet: quality and certifications
After listing the factors that determine thequality of the pellets, let's take a look at the standards set by the most commoncertifications.
Thecertificationscomply with precise European regulations. Thecertificationsthey must be released after appropriate checks and chemical analyzes, for example:
- verifying that thepelletsis completely devoid ofartificial chemical compoundssuch as formaldehyde or paint residues.
- By testing the calorific value.
- Testing the ash residue.
- Checking the durability.
- By ascertaining the absence of radioactivity.
To support thecertificationsthere is no shortage ofclassifications. A European classification has recently been introduced with ENplus certification.
The ENplus certification of pellets refers to the standardEN 14961-2: 2011. This certification is issued only after having carefully examined the entire production chain:
- production or reception of the raw material (chipboard, sawdust, various residues from wood processing)
- collection and storage
- combustion test
- distribution of pellets(placing the pellets on the market)
The ENplus certification sees three different onesclassifications,A1, A2, B.
The classificationA1it is absolutely the best, it indicates a clean combustion pellet with a maximum ash residue of 0.7%. With the A2 the ash residue reaches up to 1.5% while with the Class B certification the combustion is not complete and there is an ash residue of up to 3%. In Class A1 and A2 the raw material used is onlysawdustwhile in Class B it can also be found bark.
Other articles that may interest you:how to buy good pellets.