Clean Energy from Woodchips
Turn forest residues into clean energy without adding a gram of extra CO₂
Using residual wood from local forests, woodchip heating provides renewable, carbon-neutral energy. Trees are not cut for fuel – only branches, treetops, sawmill by-products, and wood residues from construction are used. This ensures we capture the energy from materials that would naturally decompose and release CO₂ anyway.
Renewable Heat from Wood
The principle behind renewable forest biomass heating is simple: trees are not harvested for energy production alone. From both an ecological and economic perspective, cutting a tree solely to grind it into wood chips for combustion would make little sense.
However, large volumes of wood are already harvested and processed by industries such as sawmills and the pulp and paper sector. Forestry operations supporting these industries generate significant quantities of underutilized residual biomass, including branches, treetops, bark, non-commercial species, and sawmill by-products. In addition, secondary wood processing industries, such as construction and furniture manufacturing, also produce substantial wood residues.
If left unused, the carbon contained in these materials would eventually be released into the atmosphere through natural decomposition. Whether decomposing naturally or being used as fuel, residual wood biomass emits essentially the same amount of carbon dioxide. By using this resource for energy production, it becomes possible to recover useful heat without adding additional CO₂ emissions to the atmosphere. In many cases, biomass heating also replaces fossil fuel consumption, further reducing overall greenhouse gas emissions.
During their growth, trees absorb CO₂ from the atmosphere. The carbon released during biomass combustion is subsequently reabsorbed by new forest growth, forming a natural carbon cycle. This contrasts with fossil fuels, which release carbon that has been stored underground for millions of years, increasing atmospheric CO₂ concentrations.
When sourced from sustainably managed forests, heating with residual wood biomass represents a renewable and carbon-neutral energy solution.
Sustainable Forest Management
Healthy forests mean renewable energy today and tomorrow
Forests that are actively maintained through regular thinning, removing smaller trees and brush, allows sunlight to reach remaining trees, helping them grow stronger and store more carbon. Thinning also reduces pests, disease, and wildfire risks. Wood harvested during thinning becomes biomass fuel, with ashes returned to the forest to enrich the soil. This cycle keeps forests healthy while providing renewable energy.
Finland’s Forests: Growing and Thriving
Choose local biomass – support forests that grow sustainably
A good example of successful woodchip heating is found in Finland. Despite woodchip heating supplying 26% of Finland’s heating needs, forests continue to regenerate and grow. This shows that locally sourced biomass is truly renewable. Unlike imported wood pellets used for electricity in other countries, which involve long transport and uncertain forest practices, Finnish woodchip heating relies on local, sustainably managed forests.
Finland could sustainably heat the whole country with woodchips
Source: Total roundwood removals and drain by region 2021 | Natural Resources Institute Finland
The graph above illustrates forest growth and harvesting volumes in Finland, measured in millions of cubic meters. In the 1950s, harvesting levels began to exceed the forests’ natural regeneration capacity. Recognizing the risk of depleting this valuable resource, the Finnish government introduced stricter forest management regulations.
Today, Finnish forests are actively and sustainably managed through regular thinning operations. During thinning, smaller and overcrowded trees and brushwood are removed to allow sunlight to reach the forest floor. This enables the remaining trees to grow in diameter rather than competing excessively for light, resulting in stronger forests and increased carbon storage as trees mature. Thinning also improves forest health by reducing vulnerability to pests and diseases while lowering the risk and spread of forest fires.
The wood harvested during thinning operations is largely converted into biomass fuel. Approximately one-third of the material is intentionally left on the forest floor to support soil regeneration, while ashes produced during combustion are returned to the forest and spread as a natural fertilizer, helping to close the nutrient cycle.
The graph also shows the quantity of wood chips used for biomass heating in Finland. Woodchip heating accounts for approximately 26% of the country’s total heating consumption. Even at this level of utilization, Finnish forests continue to regenerate and grow, demonstrating that wood-based biomass heating is a genuinely renewable energy source under sustainable forest management practices.
In recent years, biomass energy has raised concerns among some stakeholders. The data presented here demonstrates that locally sourced biomass heating can be renewable and sustainable in a country such as Finland. However, these results should not be confused with models such as that of the United Kingdom, where large volumes of wood pellets are imported from overseas to generate electricity. Long-distance transportation increases the carbon footprint, and sourcing may occur in regions where forest management practices are less sustainable.
It is therefore important to distinguish between local biomass heating based on forest residues and large-scale electricity production relying on imported biomass fuels when evaluating the environmental impact of renewable biomass energy.
Boosting Local Jobs with Biomass
Fuel your home, fuel your community
Woodchip heating supports the local economy in ways fossil fuels cannot. When you use propane or fuel oil, most of your spending leaves the region. Using locally produced woodchips keeps money circulating within the community, creating jobs for foresters, delivery operators, nurserymen, equipment contractors, and more. Renewable energy becomes a force for local economic growth.
Creating Local Jobs Through Renewable Energy
Unlike compressed wood pellets, wood chips require significant storage space and are therefore economically viable primarily when produced and used locally. As a result, woodchip heating naturally supports and strengthens local economies.
When you fill a heating system with propane or fuel oil, only a small portion of the spending remains local, typically limited to transportation and distribution. Most of the money quickly leaves the region, flowing toward fuel producers located in other provinces or countries.
By contrast, when a biomass boiler is supplied with locally produced wood chips, the investment stays within the community. Revenue circulates through an entire local value chain, supporting numerous professions, from delivery operators and equipment contractors to foresters, nursery operators, and forestry workers.
Heating with locally sourced wood chips does more than produce renewable energy; it creates sustainable local employment, strengthens regional economies, and builds greater energy independence.
Woodchip Heating: Renewable and Community-Friendly
Switch to woodchip heating — renewable energy that makes a difference
Heating with woodchips is more than carbon-neutral energy. It’s a solution that benefits the climate, strengthens communities, and supports local jobs. By choosing locally sourced biomass, you invest in sustainable energy and a resilient, thriving regional economy.
Additional Resources:
– KWB Biomass boilers