Pellet boiler – simple and safe heating with pellets

Pellet boiler - environmentally friendly heating with reliable service

A pellet boiler is a smart and climate-friendly way to convert and supplement your current oil boiler. With simple, reliable technology, you get clean and efficient heat that radically reduces CO2 emissions compared to most other energy sources.

Clean Burn has extensive experience in renewable energy and helps companies with safe installations of pellet and wood chip boilers and other heating solutions.

Contact us for more information!

A pellet boiler is a modern way to heat your home or property using bioenergy. It replaces oil, electricity, or older wood-burning boilers and uses wood pellets as fuel.

Pellets are small, compact cylinders made from compressed sawdust. They contain a lot of energy in relation to their size and are easy to store and handle. This makes pellet boilers a practical alternative for those who want a sustainable solution without complicated handling.

When are pellets the best solution?

  • Why choose a pellet boiler?

    There are several reasons why many people choose pellets:

    ✔ High energy content in a small space
    One kilogram of high-quality pellets provides approximately 4.8 kWh of energy. This means that you get a lot of heat from relatively small volumes of fuel.

    ✔ Low ash content
    Pellets have low moisture content and burn efficiently. Very little ash is produced, and what remains is natural.

    ✔ Easy storage
    Pellets are stored in a pellet storage facility (silo), often 6–7 m³ for a normal property, and up to 85 m³ silo. It is also possible to connect several silos for larger facilities. It takes up less space than wood chips.

    ✔ Stable and consistent quality
    Since pellets are manufactured industrially, they are of consistent quality. This allows the boiler to operate efficiently and stably.

    ✔ Renewable energy
    Pellets are a biofuel. When burned, they do not release any new fossil carbon dioxide, making them a more climate-friendly alternative than oil and gas.

  • What effect do you need?

    Pellet boilers come in different sizes depending on how much heat is required.

    Smaller buildings: 20–60 kW

    Medium-sized properties: 80–301 kW

    Larger facilities: 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.

    Correct dimensioning is crucial for economical and stable operation.

    Herz Firematic the technology behind the solution

    Herz Firematic a modern bioenergy boiler developed for operational reliability and long service life.

    It is equipped with:

    ✔ Lambda sensor that optimizes combustion

    ✔ Low emissions in accordance with eco-design requirements

    Remote monitoring capability

    This means you get a solution that is effective, controllable, and built to last for many years.

  • How does the pellet boiler work?

    A modern pellet boiler is largely fully automatic.

    Pellets are automatically fed into the burner.

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

    The heat is transferred to the property's or district heating network's system.

    The ashes are collected automatically in an ash container.

    This means you don't have to stand there and feed fuel manually. The boiler senses how much heat is needed and adjusts its operation accordingly.

    Automatic cleaning and low labor requirements

    To ensure that the boiler maintains high efficiency, important parts are cleaned automatically. This maintains efficiency over time and reduces the need for manual cleaning.

    The only thing that normally needs to be done is:

    ✔ Empty the ashtray regularly

    ✔ Check the facility periodically

The difference between pellets and wood chips

Wood chips and pellets are both popular biofuels, but they differ in their production and form.

Wood chips consist of finely chopped wood – usually from less valuable parts of trees, logs that are not suitable for sawing. Wood chips are used directly as an energy source in both large heating plants and smaller facilities, and also as a raw material in the paper industry.

Pellets, on the other hand, are a highly compressed fuel. It is made from by-products such as sawdust or shavings. The material is dried, ground into a fine fraction and then compressed under high pressure and heat. The result is small, compact cylinders with high energy content.

Smooth and automatic heating

A pellet boiler is an energy-efficient and smart choice for those who want stable heating in a property or for process heating. Thanks to its compact size, the boiler is easy to install, for example in the basement, without taking up unnecessary space. The system is largely self-sufficient.

Your pellet boiler senses the property's heating requirements and automatically adjusts its operation. It supplies radiators, underfloor heating, domestic hot water, and fan coil units with the right amount of heat, and when demand decreases, the boiler switches off automatically, saving energy.

That's why pellet boilers are a wise choice for the future.

More and more people are choosing pellet boilers for smarter and greener properties. Pellets are made from sawdust from the wood industry and are a clean, natural, and renewable energy source. When you factor in investment, operation, and environmental impact, pellet heating is both affordable and sustainable. For new builds, there is the possibility of support for the installation of pellet boilers. The raw material is abundant in Sweden, competition is good, and prices are stable.

Everything you need to know about pellets - your smart heat source

  • One ton of standard quality pellets contains approximately 4.8 MWh and has low moisture and ash content, which ensures efficient combustion.

  • Absolutely! Pellets count as biofuel. When you burn pellets, you do not add any new carbon dioxide, making it a climate-friendly and sustainable alternative to fossil fuels.

  • The silo should be large enough to last at least four weeks, the coldest month of the year. Ideally, you should be able to accept a full truck and trailer to get the best price. 

  • A well-maintained pellet boiler will generally last 20–25 years, often longer. With proper installation and regular maintenance, you will have a reliable and sustainable heating solution for a long time to come.

  • Yes, it works perfectly with solar panels or district heating, for example. There are even modules that can be plugged into the boiler control system to control your solar heating system.

  • This varies between municipalities and may be required for larger installations. Check with your municipality or contact us and we will help you. Always choose a system that complies with the Ecodesign Directive and is EN 303-5 approved.