Why do the rules condemn open fireplaces in 2026?
The switch is no longer just a question of saving money, it is a legal obligation in many cities. Environmental authorities are targeting open fireplaces for two main reasons:
- Fine particle pollution: burning wood in an open fireplace releases as much PM2.5 fine particles in a few hours as a recent vehicle does over thousands of kilometres.
- Wasted energy: 85 % of the heat produced goes straight up the flue.
The Fulgurant view
Under the new 2026 standards, only appliances carrying the Ecodesign or Flamme Verte label meet the air quality requirements while cutting your wood consumption by four.
What are the options for replacing your fireplace?
To move from a pleasant view to a real heating system, three options stand out:
1. The high-performance stove insert (the renovation solution)
This is the simplest solution: it slides into the existing hearth. It turns your fireplace into a giant radiator through convection.
To keep your stove insert efficient, using our Stove Glass Cleaner is essential! Clean glass lets the infrared through, maximising the radiant heat in the room
View more
2. The pellet stove (the self-sufficient solution)
Fully programmable, it delivers efficiency close to 92 %. It is the ideal solution for main heating without the chore of handling logs.
Our Chimney Sweeping Pellets remove soot, tar and wood dust to protect your appliance. This maintenance keeps the smoke drawing properly
View more
3. The hybrid closed fireplace (the power solution)
Ideal for large spaces, it lets you keep using ordinary logs while guaranteeing a fully sealed unit and greater safety.
Our Chimney Sweeping Powder works by destroying soot and tar. It is the vapours given off by the product that trigger the reaction needed to break down the tar and the soot. Throw the product onto a FIERCE FIRE!
View more
How do you keep your heating efficient for years? 8 expert tips
Installing a new appliance is not enough. In 2026, lasting performance depends on fighting the build-up of deposits.
1 mm of soot in your flue means 10 % less efficiency. Here is how to get the best from your installation:
1. Avoid open fireplaces
An open fireplace heats very poorly: 90 % of the energy is lost. This poor combustion damages air quality and burns a huge amount of wood for very little heat. Recent stoves use 9 times less wood than an open fireplace.
2. Give up fires lit purely for pleasure
Burning wood in an open fireplace releases harmful pollutants. Avoid these fires, especially during pollution peaks. Note: check with your local authority, as some areas now ban them.
3. Install a modern, certified appliance
Recent stoves and stove inserts optimise combustion (efficiency of 75 to 98 %). Look for the Flamme Verte label and use an RGE certified professional so you can claim the available grants (MaPrimeRénov’, Fonds Air Bois).
4. Choose an appliance of the right size
An oversized appliance will run below its rated output, producing more residue and wearing out early. It is better to use an appliance matched to your floor area, which will run at full output for clean combustion.
5. Use dry, good quality wood
Burn split wood with a moisture content below 23 %. Look for labels such as France Bois Bûche.
The Fulgurant tip: store your wood under cover and raised on pallets, and bring your logs indoors 48 hours before use to drive off surface moisture.
6. Learn to use your fireplace properly
- Light from the top: this is the most effective way to heat the flue quickly and reduce smoke.
- Adjust the draught: open the air inlets fully when starting, then reduce them without ever closing them completely, even at night.
- No treated wood: never burn old furniture or pallets, which give off toxic smoke.
7. Do not neglect chimney sweeping and chemical maintenance
Annual mechanical chimney sweeping is compulsory, but it does not remove the tar baked onto the walls (the glaze).
The Fulgurant solution: use our catalytic chimney sweeping log. It weakens the tar so that your flue stays completely clear and fully safe.
8. Keep the glass and the ash pan clean
A full ash pan smothers the fire. Dirty glass blocks the infrared heat from radiating.
The star product: apply our Fulgurant Stove Glass Cleaner. Its professional formula works in 30 seconds for perfect transparency and restored warmth.
FAQ: your questions
Is it really forbidden to use my open fireplace in Lyon or Grenoble?
Yes, since 1 April 2023 in Lyon and 1 January 2026 in Grenoble, using an open fireplace has been banned by prefectural order. The measure is gradually being extended to every area covered by an air protection plan (PPA). Breaking this rule exposes you to fines and voids your insurance cover in the event of a claim.
Which product should I use to clean the glass of my new stove insert without damaging it?
New stove inserts use treated glass. Fulgurant Stove Glass Cleaner is formulated without aggressive caustic soda, so it removes even the most stubborn soot marks without attacking the seals or clouding the glass.
Does chemical chimney sweeping replace mechanical chimney sweeping?
No. The law requires two mechanical chimney sweeps a year. However, the Fulgurant chemical treatment is essential alongside it: it dries out the tar that the brush cannot shift, which sharply reduces the risk of a chimney fire.
