How to fire without smoke: Sustainable and healthy woodburning
Burning wood is a cosy and cheap way for many people to heat their homes. Yet it also comes with drawbacks, such as smoke pollution, air pollution and health risks. Fortunately, with the right knowledge and techniques, you can woodburning without smoke. In this article, you will learn all about smoke-free burning, from choosing the right wood to lighting your fireplace or stove correctly.
Why smoke-free burning is important
Burning wood releases particulate matter, carbon monoxide and other harmful substances. These substances can lead to respiratory problems, cardiovascular diseases and even cancer. Especially in densely populated areas, wood smoke cause serious inconvenience.
- Air pollution: Poorly fired wood-burning stoves can emit more particulate matter than trucks.
- Health risks: Children, the elderly and people with asthma are especially sensitive to wood smoke.
- Neighbour nuisance: Smoke coming out of the chimney can enter neighbours' homes and cause complaints.
Read more about the health effects of wood smoke here.
What does 'firing without smoke' mean?
Smoke-free firing means that you burn wood in a way where hardly any visible smoke comes out of the chimney. You achieve this with the right combination of dry wood, good air supply and efficient combustion technology. The result is a higher combustion temperature, fewer emissions and more heat output.
The basics of smoke-free wood firing
Choose the right wood
Not every piece of wood is suitable for burning. Always use clean, dry and untreated wood. Avoid painted or impregnated wood - this gives off toxic fumes.
- Air-dried wood: Let dry for at least two years under a shelter with adequate ventilation.
- Moisture percentage: Use a moisture meter to check if the wood contains less than 20% of moisture.
- Hard woods: Oak, beech and ash burn longer and provide more heat than softer species such as poplar or willow.
Ensure adequate air supply
Oxygen is essential for complete combustion. A shortage of air causes incomplete combustion and therefore more smoke.
- Always open the air supply fully when lighting the fire.
- Only slowly close the air supply after complete ignition - but never completely.
- Ensure ventilation in the room where fires are being fired.
Lighting according to the Swiss method (top-down)
One of the best ways to fire without smoke is the so-called top-down method:
- Place large blocks at the bottom of the stove or fireplace.
- On top of that, build smaller blocks and kindling (wood shavings or firelighters).
- Light the fire at the top - this way it burns slowly towards the bottom.
This method ensures rapid heating of the chimney, allowing smoke to be discharged better and creating less. Also check this external source on responsible woodburning according to Milieu Centraal.
Use a modern wood-burning stove or pellet stove
New generation of stoves, such as pellet stoves or modern wood-burning stoves with secondary combustion, are much more efficient than older models. They burn cleaner, give off more heat and produce fewer pollutants.
- Ecodesign label: Choose an appliance that complies with European Ecodesign directives (mandatory from 2022).
- Read more about pellet stoves as an alternative to traditional fireplaces here.
Chimney maintenance: essential for safe heating
A well-maintained chimney is crucial to prevent smoke build-up. Creosote (a tar-like deposit) can accumulate in the chimney during incomplete combustion, leading to blockages or even chimney fires.
- Chimney sweeping: Have your chimney professionally cleaned at least once a year.
- Chimney cap: Prevents rain and improves chimney draught.
Sustainable alternative: electric or infrared heating
Don't want to emit smoke at all? Then consider alternatives such as electric fireplaces or infrared heating. Not only are these options emission-free, they are also low-maintenance and easy to install.
- Check out our guide on electric fireplaces as a sustainable alternative here.
- Read here why infrared panels are becoming increasingly popular in the Netherlands.
Tips for nuisance-free heating (for you and your neighbours)
- Choose windless days: In foggy or windless weather, smoke lingers - prefer to wait until there is sufficient wind.
- Report use to neighbours: Inform neighbours if you are going to fire - this will prevent irritation or complaints.
- Install CO and particulate matter detectors: For extra safety in the home and awareness of air quality.
Smart technology: measuring is knowing!
Nowadays, there are apps and sensors available that allow you to measure in real time how much particulate matter your stove emits. Think of devices such as the Airly sensor or apps like Luftdaten. So you can improve your own behaviour as well as contribute to cleaner air in your neighbourhood.
Sustainable heating = conscious choice
Firing without smoke starts with making conscious choices:
- Choose sustainably produced firewood (with FSC or PEFC label).
- Choose local suppliers to reduce transport emissions.
- Choose modern appliances with low emission standards.
Contribute to better air quality by heating responsibly. Not only good for yourself, but also for your environment!
Sustainable future: municipal policy & regulation around wood burning
For several years now, municipalities have been taking measures against excessive wood smoke. These include fire alerts, bans on fireplaces in new buildings and subsidies for cleaner alternatives such as heat pumps or solar boilers. Find out from your municipality about local rules around wood burning via this government page, for example:
Central government - Wood smoke & air quality.
Frequently asked questions about 'How to heat without smoke' (FAQ)
What is the best way to fire without smoke?
The best method is top-down lighting with dry hardwood, full air supply at start-up and use of a modern Ecodesign-labelled stove.
Which type of wood gives the least smoke?
Dry hardwood such as oak, beech or ash gives little smoke if properly dried (less than 20% moisture).
How do I know if my stove is burning cleanly?
If there is barely visible smoke coming out of your chimney AND the glass of your stove remains clear, it is burning clean. You can also use particulate gauges to measure this objectively.
Is electric heating more expensive than wood burning?
In the short term, electric heating can seem more expensive, but lower maintenance costs, no fuel storage and subsidies can make it more economical in the long run - especially with solar panels.
What does the law say about wood smoke?
Both national guidelines and municipal regulations apply to nuisance caused by wood smoke. In case of structural nuisance, you can report to your municipality or GGD.
Useful external sources of support:
- Milieu Centraal - Responsible Wood Burning Tips & Advice
- RIVM - Information on health effects of Wood smoke
- Central government - Legislation around Wood Smoke & Air Quality
- Nature & Environment - Campaign against polluting Wood Burning
- GGD Environment - Health & wood smoke
