“Why should I buy more expensive pellets? They look exactly the same!”
At first glance, perhaps yes. But you often only notice the difference when heating. Some pellets burn without major problems, while with others you have to clean the burner more often and empty the ash pan more frequently.
And suddenly, the difference of a few crowns per bag doesn’t seem so advantageous anymore.
What do ENplus A1, A2 and B mean?
These markings indicate different quality classes of wood pellets.
For conventional pellet stoves in homes, the ENplus class A1 is often recommended. However, the decisive factor is always the type of fuel specified by the manufacturer of the respective stove.
One of the differences between the classes is the permissible amount of ash:
| Class | Maximum ash content |
|---|---|
| ENplus A1 | 0,7 % |
| ENplus A2 | 1,2 % |
| ENplus B | 2,0 % |
The values indicate the maximum ash content in the dry matter, not the amount of ash guaranteed for each package.
To give you a better idea: When burning one ton of completely dry pellets, the ash content 0,7 % would correspond to the ash content 7 kg, while the ash content 2 % would correspond to the ash content 20 kg.
In practice, it depends on the actual composition of the respective pellets, their moisture content, and the combustion conditions.
Important: A2 pellets are not automatically bad, and A1 pellets are not necessarily the most expensive. A higher quality class primarily means stricter requirements regarding certain fuel properties.
Why can cheaper pellets mean more work?
Imagine two seemingly identical quantities of pellets.
The first models are heated regularly, combustion is carried out properly, and the burner is cleaned according to the manufacturer’s recommendations.
In other cases, you will notice increased ash, hard deposits, or a more frequent need for cleaning.
The problem may lie not only in the amount of ash, but also in its properties. Some pellets can form hard deposits during combustion, which restricts the air supply to the burner.
Such deposits can impair proper combustion and lead to operational disruptions.
However, this does not mean that every cheaper pellet will automatically lead to clumping. Similar problems can also be caused by incorrect stove settings, inadequate cleaning, or insufficient combustion air supply.
Are dark pellets inferior to light ones?
“They are beautifully bright, they will definitely be of better quality.”
This is one of the most common mistakes.
The color of the pellets can be related to the type of wood used, the bark content, and the manufacturing process. However, it alone is not a reliable indicator of quality.
Darker pellets are therefore not necessarily bad, and lighter ones do not automatically meet the requirements of the highest quality class.
However, their verified parameters are far more important.
What happens if there is a lot of sawdust in the bag?
If you open the bag and find a large amount of wood dust and crushed pellets at the bottom, you should take notice.
Pellets can be mechanically damaged during production, transport, and storage. However, excessive amounts of fine particles can impede fuel transport in the feeding mechanism and impair combustion.
The ENplus certification therefore also monitors the mechanical strength of the pellets and the proportion of fine particles.
If the pellets break down significantly during normal handling, they may not be a suitable fuel for your stove.
Can pellets get wet even when packaged?
Yes.
Pellets are compressed wood fuels that can absorb moisture from the environment. When wet, they swell, lose their cohesion, and disintegrate.
This is a particular problem with automatic pellet stoves, where the fuel must flow reliably through the storage container and the feed system.
Therefore, store the pellets in a dry place, away from direct contact with damp soil, and protect the packaging from damage.
Even the ENplus A1 label does not guarantee that the pellets will retain their good quality if they are stored for a longer period of time in a humid environment.
Does A1 also mean a higher calorie value?
Not necessarily.
This is an important difference that may surprise the customer.
According to the ENplus requirements, all three classes have the same minimum calorific value: 4,6 kWh/kg.
A higher quality grade does not automatically mean that you get more heat from one kilogram.
The differences lie mainly in other fuel properties, such as ash content, mechanical strength and raw material requirements.
How can I tell that I am buying truly certified pellets?
The mere use of the terms “premium pellets” or “A1 quality” does not mean that the product has a valid ENplus certification.
When looking at the packaging of certified pellets, pay attention to the ENplus label, the corresponding quality class and the identification number of the certified body.
The validity of the certification can be verified in the official ENplus database.
If a manufacturer or seller merely claims that the pellets meet A1 quality standards, this is not the same as a valid certification.
Is it therefore worth buying the most expensive pellets?
NO. The most expensive pellets may not be the best choice for your stove.
The correct procedure is the opposite: First, you should find out which fuel the manufacturer of the stove specifies, and then compare pellet offers that meet these requirements.
When choosing, you should not only pay attention to the price per bag, but also to the quality, the actual calorific value, the ash content, the packaging condition and the storage conditions.
If your stove manufacturer specifies ENplus A1 pellets, it is not advisable to switch to a lower quality grade just to save a few crowns.
What can you take away from this?
Pellets are not simply ordinary wooden cylinders. They are a fuel whose properties affect the operation of the stove, the amount of ash, and the required maintenance.
The next time you have to choose between two bags, don’t just ask which one is cheaper.
Ask also: Which one is the right one for my stove?