Wood pellets are the fuel that provides both the heat and smokey flavour in a Z Grills pellet smoker. Let’s learn a bit more about wood pellets!
What types of wood are used?
Not just any type of wood is suitable for a wood pellet smoker. Wood varieties are chosen that provide a nice smokey flavour when burnt and include both hardwoods and many fruit woods. Varieties can be mixed to create a blended wood pellet. Some wood types provide a very subtle flavour, whilst others like Mesquite are much more powerful.
It is important only to use wood pellets designed for wood pellet smoker grills, and not pellets used for heating furnaces as they will make the food taste terrible!
In Australia we are lucky to have locally grown Aussie hardwood wood pellets that may include varieties such as Yellow Stringy Bark, Grey Box, Flooded Gum and Ironbark. What’s even better these pellets are made from scrap wood shavings that would otherwise go to waste.
Other popular wood varieties include:
Additional flavours can be added to wood pellets by adding herbs into the mix, or even including woods from barrels used to store alcohol such as wine or port.
It is perfectly fine to mix different wood pellet varieties. So adding some Hickory into a base of Aussie hardwood might be worth trying!
Can heating wood pellets be used?
No! Wood pellets for heating are not suitable and will make the food taste terrible.
Any QUALITY wood pellets that are made for pellet grills, pellet smokers or pellet BBQs will work fine in Z Grills. Not all pellets are created equal and some can lead to fire-out issues or inability to reach the set temperature due to high moisture content. Use brands that the Z Grills community knows and trusts.
How are the wood pellets fed to the fire-pot?
An auger motor connects to the end of a spiral auger shaft that feeds wood pellets from the hopper through a feed tube into the fire-pot.
The auger shaft rotates the auger very slowly, only 1.6 RPM (revolutions per minute) for most Z Grills models.
The controller turns the auger motor on/off intermittently to supply wood pellets into the fire-pot to reach and then maintain the set temperature.
A small fan on the front of the auger motor cools the motor, not to be confused with the large fan underneath the hopper that supplies air to the fire-pot.
Noisy Auger & Pellets
Sometimes a wood pellet can become lodged between the auger shaft and wall of the feed tube making a grinding or squeaking noise. As long as the auger is still turning intermittently there is nothing to worry about and the noise should stop once the pellet makes it way through into the fire-pot.
A clunking sound make also be heard as longer pellets are broken in half by the auger as they enter the mouth of the feed tube. This is also normal.
It is very uncommon that a pellet becomes so jammed that the auger cannot rotate. If you think that may be the case, click here to learn how to clear it.
The auger motor and auger shaft are mounted with lots of free movement to allow pellets to be effectively pushed through into the fire-pot.
How are the wood pellets ignited?
An ignition rod (or hot rod) extends into the bottom of the fire-pot and gets red hot to ignite the wood pellets. The ignition rod runs for about 5 minutes when the Z Grills is first turned on and then sometimes during operation if the temperature drop suddenly, or below a certain temperature to prevent the fire going out.
Where can I get wood pellets?
Check our Facebook group or other BBQ groups/forums for availability of quality pellets in your local area, as delivery costs can be high due to the weight.
We stock pellets in our warehouses which can be purchased online for warehouse collection only (no shipping options). The pellets types in stock varies across the warehouses, so feel free to contact us before the order to confirm what options there are for you to choose from.
How fast are pellets used?
Pellet usage is directly linked to the amount of heat loss from the grill to the surrounding air. The larger the temperature difference the more pellets will be required to maintain the grill temperature (ie. heat produced = heat loss).
Factors that impact pellets usage include:
- Cold weather = more pellets used
- High grill temperatures = more pellets used
- Windy conditions = more pellets used
- Hot weather = less pellets used
- Direct sunlight = less pellets used
- Type of wood pellet. Hardwoods tend to have more heat/kg than softwoods.
Pellet hourly usage rate
- Low temperature operation = 0.3 to 0.5kg/hour (0.7 to 1.1lbs)
- High temperature operation = 1 to 2kg/hour (2.2 to 4.4lbs)
How to reduce pellet usage
- In cold weather an insulating cover can be used to significantly lower heat loss and reduce pellet usage.
- Avoid opening the lid too much which releases heat
- Keep the grill out of the wind
How are pellets made?
Wood pellets are made by forcing finely chopped wood fibre through a die at high pressure. During this process the pressure and friction heats up the wood to over 100℃ melting the lignin in the wood. As the pellets cool the lignin acts like a glue to hold the wood together once cooled back down. No chemicals or additives are needed to form the wood pellets.
Click here to learn more about lignin.
Do pellets need to be cleaned out after every cook?
No, the pellets can stay in the hopper.
Z Grills only use as many pellets as required to maintain the set temperature. If planning to cook again in the next 1-2 weeks, leave the pellets in the hopper but ensure they are NOT exposed to any rain or high moisture levels.
If not planning to use the grill for several weeks or longer, it is a very good idea to scoop out all the remaining pellets (temporarily remove the protective guard if required) then fire up and run the grill until all the pellets are feed into the fire-pot and the fire goes out.
Eventually the grill will show a LER (low temperature ) error on the screen (which is ok).
Once the grill has cooled down, vacuum out the bottom of the hopper of wood dust and the the fire-pot and grill drum of ash.
Click here for more information about cleaning a Z Grill.
How to store wood pellets?
It is important to keep wood pellets in sealed container or bag to avoid absorbing moisture.
Above shows nice dry pellets (left) and ones that have gotten wet (right) in the bottom of the hopper. Once they dry, wet pellets can set like concrete and stop the auger from rotating, see here for more information on how to fix that.
Seal the top of the plastic bag the wood pellets came in, or store in a plastic bucket with well sealing lid.
Moist pellets will not burn as hot and the fire may even go out.
If you notice they are moist or any water drips in there, immediately clean out the hopper and run the grill on high to clear out all pellets.
Can wood dust cause any problems?
Lots of wood dust in the hopper can lead to temperature spikes, excess smoke and even burn-back resulting in a smokey hopper.
A good habit is to sift the last part of the bag of wood pellet with a large sieve or colander to remove the wood dust.
Running the wood pellets completely out and vacuuming the bottom of the hopper every 40-50kg of pallets is also a good habit.
Click here for more information about cleaning a Z Grill.
How much smoky flavour?
Click here to learn more about smoky flavour and how much smoke to expect from the Z Grill.