Can you use heating wood pellets in a pizza oven?

Outdoor pizza ovens have become a massive lifestyle trend across the UK, allowing households to cook restaurant-quality, wood-fired pizzas in their own gardens. Many of these compact ovens are fuelled by wood pellets.

If you already have a bulk supply of standard heating pellets in the garage for your boiler, it is incredibly tempting to scoop a few into the pizza oven. After all, wood is just wood, right? In reality, mixing these two products is highly dangerous. In this guide, we explain the critical differences between heating fuel and cooking fuel, and why you should never use heating pellets to cook food.

The distinction between the two types of pellets lies entirely in the manufacturing process and the raw materials used.

• Food-grade pellets: These are manufactured specifically for culinary use. They are made from 100% pure, untreated hardwood (such as oak, apple, or hickory) and contain absolutely zero bark, glues, or artificial binders.

• Heating wood pellets: While premium heating pellets are also highly regulated (such as ENplus A1), their sole purpose is to generate heat safely inside a closed metal boiler. They are often made from softwoods (like pine or spruce) and may contain natural resins or permitted biomass binders that help them keep their shape.

When you cook in a wood-fired pizza oven, the flames and the smoke pass directly over the surface of the food.

Heating pellets are not designed for human consumption. Burning softwoods like pine releases thick, pungent smoke containing heavy resins and sap. If heating pellets happen to contain any recycled wood or non-food-safe binders, burning them will release toxic chemical fumes directly into the oven. These fumes will immediately absorb into the dough and cheese, rendering the food hazardous to eat and potentially causing severe stomach upsets or respiratory irritation.

Even if a heating pellet is 100% natural, it will ruin the cooking experience.
Softwoods burn very quickly and produce a bitter, acrid smoke that leaves a terrible chemical-like taste on the pizza. Food-grade hardwood pellets, on the other hand, burn slowly, generate an intense, clean heat (crucial for getting that perfect crispy crust in 60 seconds), and impart a delicate, sweet, smoky flavour to the food.

Domestic pizza ovens rely on a very specific, aerodynamic airflow to draw the flame across the top of the oven ceiling.

Because heating pellets are designed for large industrial or domestic boilers, they often produce slightly more ash than culinary pellets. In the tiny burn tray of a portable pizza oven, this excess ash will quickly block the air intake holes. The fire will be starved of oxygen, causing it to smoulder, drop in temperature, and billow thick, uncombusted smoke out of the front door.

Never compromise on food safety to save a few pounds. Heating pellets belong in a closed biomass boiler, while food-grade pellets belong in the kitchen or garden. To ensure your pizzas taste incredible and your family stays safe, only ever fuel your oven with clearly labelled, 100% hardwood, food-grade pellets.