Wood chip boiler – efficient heating for larger needs

A wood chip boiler is the solution for those who have greater energy needs and want to use bioenergy in the form of wood chips. Wood chips consist of shredded wood, often from branches, tops, or residual material from forestry.

It is a natural and renewable fuel that is particularly well suited to agriculture, industry, and large properties with high energy consumption.

When is wood chips the best solution?

  • Why choose a wood chip boiler?

    Wood chips are not always the easiest fuel to use, but in the right context, they can be the most economical.

    Cost-effective for larger volumes
    When energy demand is high, wood chips can provide a low cost per kWh produced.

    Possibility of your own fuel supply
    If you have access to forest or residual material, you can produce some of the fuel yourself.

    Suitable for large properties
    Wood chip boilers are often used in:

    ✔ Agriculture

    ✔ Industry

    ✔ Municipal buildings

    ✔ Larger property portfolio

    Renewable energy
    Wood chips are a biofuel and contribute to a more circular use of forest raw materials.

  • How does a wood chip boiler work?

    A wood chip boiler works on the same basic principle as a pellet boiler, but is designed for larger quantities of fuel, and the wood chips are stored in a larger storage facility.

    The fuel is automatically transported into the boiler via a screw conveyor or other feeding solution.

    Combustion is controlled electronically to provide the right amount of power.

    The heat is transferred to the building's heating system.

    The system is automated, but requires more space and planning than a pellet solution.

    Fuel handling and storage

    Unlike pellets, wood chips require more storage space. Often needed:

    ✔ A separate fuel storage facility

    ✔ Mechanical handling, for example wheel loaders

    ✔ Planning for refueling

    This may make wood chips less suitable for small properties, but they are very effective in larger operations where handling is already a natural part of operations.

    Adaptation to varying fuels

    Wood chips can vary in moisture content depending on how they are stored and produced. Modern systems are designed to handle these variations and still deliver stable output.

    For larger facilities, this is crucial to ensuring a consistent and secure heat supply.

  • Is a wood chip boiler right for you?

    Using wood chips as fuel is usually most suitable when:

    ✔ Energy requirements are high

    ✔ There is plenty of storage space

    ✔ Mechanical handling is possible

    ✔ Focus is on low cost per kWh

    For smaller properties or limited space, pellet boilers are often more practical, but with functional, existing logistics (ample storage space and access to wheel loaders or similar) a wood chip boiler can also be an interesting option for small properties.

    What effect is needed?

    Wood chip boilers are most commonly used in medium-sized and large power areas, for example:

    ✔ Medium-sized properties: 80–301 kW

    ✔ Larger installations: up to 499 kW. All HERZ can also be connected in series in a cascade. Up to eight boilers can be connected in the same system.

    ✔ HERZ alsoHERZ boilers for smaller buildings: 20–60 kW

    Correct dimensioning is crucial to ensure good operating economy and even heat production.

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