What Are The Different Grades of Wood Pellets?

Hi, I’m Chris I started PelHeat.com back in 2007.

Wood pellets have a very wide range of uses. They can be used in stoves and boilers for fuel, as animal/horse bedding and even for BBQs. With such a wide range of uses, wood pellets are produced to different standards and qualities. For instance, when it comes to burning wood pellets the percentage of ash produced is an important consideration. However, when wood pellets are used for horse bedding how much ash those pellets produce when burnt is relevant. It should also be noted with BBQ wood pellets the standards referenced below do not apply. Therefore with this post, I wanted to discuss the different grades of wood pellets and what effects their grade/standard.

Disclaimer: Hey! By the way… any links on this page that lead to products on Amazon or other sites are affiliate links and I earn a commission if you make a purchase.

Some wood pellet are stated to be ‘premium’ grade, but what does/should a premium grade wood pellet actually mean? Image – Amazon

Premium Wood Pellets For Fuel Uses

There are various different grades of wood pellets used for fuel. The highest standard of pellets and the most expensive are referred to as ‘premium wood pellets’. These are typically produced from the waste sawdust from timber production. However, to produce premium wood pellets from logs the bark also has to be removed.

What Are True Premium Grade Wood Pellets?

To be considered as a premium grade wood pellet generally means the following requirements are met:

  • Ash content at or below 0.7%
  • Moisture content below 10%
  • Good mechanical durability with low fines

As shown above, a premium grade wood pellet requires ash content below 0.7%. However, it also means the pellets produce very little dust, also known as fines. Finally, it means the wood pellets were produced to a sufficient density. Wood pellet density is very important, as a low-density wood pellet will produce more fines during transportation and handling. You can easily test for yourself if a wood pellet is produced to a good density by breaking the pellet horizontally as shown in the diagram below.

How To Test Wood Pellet Quality
You can easily test if a wood pellet is produced to a good density by applying horizontal force to snap the wood pellets.

For premium wood pellets, in fact, any well-made wood pellets you expect a clean snap with very few fines. There are various premium wood pellet certification schemes, below are some examples:

Pellet Fuels Institute Wood Pellet Grading

Pellet Fuels Institute

The Pellet Fuels Institute (PFI) is the predominant wood pellet trade association in the US. The institute works with both pellet fuel manufacturers and pellet stove/boiler manufactures. Pellet stoves and boilers can use the PFI Fuel Grade stickers to inform consumers that they should only use a particular grade of wood pellet fuel in that appliance.

The PFI has three grades of wood pellets under its certification scheme. They include Premium, Standard and Utility. The table below from the PFI shows the requirements to meet the certification standard of each grade.

PFI Wood Pellet Fuel Grades
The Pellet Fuels Institute (PFI) has three different grades of wood pellets under certification which include Premium, Standard and Utility.

The Difference Between Premium, Standard and Utility Wood Pellet Grades

First, it’s important to note that all grades have the same required diameter and length. However, the premium grade has slightly higher durability (>96.5), lowers fines (>0.5%), lower ash content (>1%) and moisture content (>8%). Most pellet stoves sold in the US can only use the PFI Premium grade, however, some are branded with the PFI Standard. Standard grade wood pellets are cheaper to purchase, but you will have to clean out the ash draw more frequently.

ENplus – European Premium Wood Pellet Standard

ENplus Premium Wood Pellet Standard

ENPlus is a premium wood pellet standard agreed by the European Wood Pellet council back in 2011. The objective was to create a quality standard to make the trade of wood pellets as a commodity simpler with an understood price to quality relationship. Since then ENPlus has seen the following:

  • 911 companies part of the ENPlus certification scheme
  • 10 million tonnes of ENPlus wood pellets produced in 2018

However, it’s important to note that this standard is not only used in Europe. There are wood pellet manufacturers in North and South America and even Asia who are part of the ENplus premium wood pellet certification scheme.

ENplus Premium Wood Pellet Requirements

ENplus Premium Wood Pellet Standards
These are the standards for the various ENplus wood pellet grades

As you can see from the table above, there are three grades of ENplus wood pellets. A1 is the top ‘premium’ grade, then there is A2 and finally, grade B.

You can see that all the wood pellet grades are produced as either a 6mm or 8mm pellet. However, there is also a length requirement of between 30mm and 40mm. The reason for this is some pellet feed system augers are specifically designed to deal with pellets up to a certain length. If the wood pellets are too long they can potentially cause damage to the feed systems on some stoves and boilers.

The ash percentages are below 0.7% for A1, below 1.2% for A2 and below 2% for grade B. You will also notice that grade A1 is produced to slightly higher mechanical durability than A2 or B grade. Most pellet stoves and boilers could probably run on the A2 grade. However, grade B may produce just too much ash for some pellet stoves and boilers to handle.

What/Who Are ENplus Grade B Wood Pellets For?

ENPlus grade B wood pellets can also be referred to by the term ‘standard grade’ or ‘industrial grade’. Now, there are some domestic pellet stoves and boilers which can burn these wood pellets. For instance, my Tatano pellet boiler can burn pretty much any type of biomass pellets. I’ve successfully burnt cardboard pellets up to 10% ash content! Therefore ENPlus grade B wood pellets at 2% is not an issue. The main market for grade B wood pellets is larger commercial pellet boilers and even for co-firing in coal power stations.

ENPlus Wood Pellet Certification Fraud

There are some wood pellet manufacturers and resellers falsely claiming their product is manufactured to the ENplus standard. Therefore ENPlus have a fraud investigation team. They also invite customers to contact them over wood pellets carrying the ENplus certificate which they believe are not up to standard. ENplus actually have a blacklist of companies who have misused their trademark.

Wood Pellet Grades for Horse and Animal Bedding

There are no specific grades for wood pellets used for horse or animal bedding. However, as stated above, the ash content and durability of horse bedding pellets is not a concern. Therefore, for the best value for money, you could purchase loose wood pellets of either standard/utility-grade as per the PFI or ENplus Grade B. Just make sure to store the pellets in a space protected from the elements with low humidity. Otherwise, the pellets can still ‘go bad‘ and break down too much before they are ever used.

A to Z List of Pellet Grill/Smoker Brands

A to Z List of Pellet Grill/Smoker Brands

Back in 2007 when I first become aware of pellet grills and smokers the only brand I was really aware of was Traeger. Traeger is really where this whole concept of cooking with pellets started in the 1980s. It was a ‘slow burner’ (pardon the pun) but since the 2010s is really when pellet grills and smokers started to get mainstream awareness, discussed alongside gas and charcoal grills. There are now over 30 pellet grill/smoker brands that I’m aware of, and the link above goes to my A to Z list of brands article.

Now, you may already be aware of a few of the other brands such as Pit Boss, Camp Chef, Z Grills and I’m sure you are aware of Weber, though you may not have known they have entered the pellet grill game. However, they are now many, many more brands to look into. Some may be what are commonly referred to as ‘Traeger clones’, but many others are offering their own unique designs and features.

A to Z List of The Best BBQ Wood Pellets

A pellet grill/smoker is only as good as the BBQ pellets you put into it. The type/quality of the BBQ wood pellets you use will impact temperature performance and smoke flavour. There are many pellet flavours including Apple, Hickory, Mapel, Oak and Walnut to name but a few. However, some brands are hardwood blended pellets whereas others are 100% single wood species.

In this article, I provide details on over 20 brands of BBQ wood pellets, their range of flavours, whether they are 100% single wood species or hardwood blended pellets, their typical price and where they are available. I also provide tips on how to get the best deal when buying BBQ wood pellets and how to test pellet quality. Finally, I discuss the new kid on the block, charcoal pellets and their special attributes compared to all other hardwood BBQ pellets.

Chris - PelHeat

Hi, I’m Chris. I started PelHeat.com back in 2007. This website is intended to be an educational resource on BBQ pellets, pellet grills & smokers. I hope you find the information useful.

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