Clean heating – CO2-neutral with HEIZFUXX®

Is wood heating really CO2-neutral?

The short answer: yes, if done right. The slightly longer answer explains why.

As it grows, a tree absorbs CO₂ from the atmosphere and stores it in the wood. When this wood burns, exactly this amount of CO₂ is released again. The balance is even as long as a new tree grows for every tree felled. This is called the closed carbon cycle.

This principle applies to all wood-based fuels. Firewood gives back the CO₂ the tree stored. Wood briquettes consist of compressed wood shavings and sawdust, i.e. residues from timber processing that would otherwise go unused. Here too: no additional CO₂ input, no new carbon problem.

The decisive difference to fossil fuels: coal, oil and gas have stored CO₂ over millions of years, which enters the atmosphere abruptly when burned. Wood only gives back what it absorbed shortly before. But this climate neutrality only applies if forestry is practised sustainably. A forest that is cleared and not reforested releases its CO₂ without ever recovering it. This is where certification comes in.

FSC certification: what is behind it?

FSC stands for Forest Stewardship Council, an international non-profit organisation that develops and monitors standards for sustainable forestry. The FSC seal on a wood product means: the wood comes from a forest managed according to ecological, social and economic principles.

In concrete terms this means:

• The forest is used in a way that allows it to regenerate permanently
• Biodiversity and natural forest structures are protected
• The rights of people who live in and from the forests are respected
• The entire supply chain from forest to product is documented and controlled

The FSC seal is not a marketing promise but an audited certificate awarded by independent bodies and regularly reviewed. It matters equally for firewood and wood briquettes, because the wood residues from which briquettes are pressed also come from forests. Anyone who chooses FSC-certified products supports forestry that does not work at the expense of future generations.

That makes the difference between climate-neutral heating and heating that sounds CO₂-neutral on paper but is not.

Really reducing emissions when heating with wood

CO₂ neutrality refers to the climate balance of the fuel. Emissions during combustion are a separate question. Wood burns, producing particulate matter, nitrogen oxides and other substances whose quantity depends considerably on how you heat.

Residual moisture and compaction

The biggest lever with firewood is moisture. Damp wood burns at lower temperatures and produces considerably more unburned particles and pollutants. Dry firewood with residual moisture below 20 percent burns more completely, hotter and cleaner.

Wood briquettes bring a structural advantage here: they are made from dried material under high pressure and have very low residual moisture ex works, typically below 10 percent. Thanks to their uniform density they burn more controlled and longer than comparable logs, which leads to a more stable combustion temperature and thus fewer emissions. Anyone who wants to run a stove for several hours in the transitional season or at night without reloading therefore often goes for briquettes.

Modern, certified stoves

Older wood stoves burn less efficiently and emit more pollutants than modern appliances. The 1st Federal Immission Control Ordinance (1st BImSchV) prescribes strict limit values for newer fireplaces. Anyone operating a system approved after 2015 is generally well positioned. Older stoves should be checked for their current permissibility.

Lighting properly

The way a fire is started noticeably influences emissions. The recommended method is top-down lighting: large logs or briquettes at the bottom, smaller pieces above, firelighter at the very top. The fire burns slowly downwards and ensures complete combustion from the start. Anyone who lights wood from below and lets it slowly smoulder upwards produces considerably more smoke and particles in the lighting phase.

Bark-free, evenly split wood and clean briquettes

Bark burns worse than the wood itself and contains more resins and substances that burn incompletely. Wood briquettes consist exclusively of debarked wood shavings and are therefore at an advantage from the outset in this respect. Evenly split firewood allows controlled air supply and cleaner combustion.

HEIZFUXX® and responsible fire

HEIZFUXX® stands for fuels that deliver what they promise, including in terms of sustainability. The range comprises firewood, wood briquettes and wood pellets that are produced and delivered to clearly defined quality standards. Kiln-dried firewood with guaranteed residual moisture below 20 percent. Wood briquettes from the RED and BLUE lines for different requirements in burn time and heat output. ENplus A1 certified wood pellets. Products designed to burn cleanly and protect the system.

Responsible fire is not a slogan. It is the attitude behind every product.

The complete range can be found at heizfuxx.com.

Conclusion: heating with a clear conscience

Heating with wood and having a clear conscience is not a matter of self-reassurance. It is a matter of the right prerequisites: sustainable forestry proven by FSC certification, dry fuels of tested quality and a stove that meets the legal emission standards. Whether firewood or wood briquettes: anyone who has these points under control really does heat as cleanly as wood allows.