Construction costs are currently skyrocketing

Yes, sure, for example here

I meant that with regard to the increased fine dust pollution indoors caused by room air-independent fireplace inserts. That was what your warning referred to. We don't need to discuss that fine dust is unhealthy. We can gladly continue via PM.

quickly remove the link while you still can. Otherwise, there will be trouble here...

Sorry, I don't understand, what do you mean?

I meant with reference to the increased fine dust pollution in indoor spaces caused by wood-burning fireplaces with room air independent fireplace inserts. That’s what your warning referred to. We don’t need to discuss that fine dust is unhealthy. We can continue this via PM if you like. heizen-mit-holz-und-hirn.de has an article on this: I’m not allowed to insert the link

[B][B]"The Federal Environment Agency and the Fraunhofer Institute give the all-clear:[/B][/B] The Federal Environment Agency investigated, on behalf of the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety, in a broad study the release of fine and ultrafine particles from various indoor sources. It was proven that "with wood-burning stoves (provided of course that they are professionally installed and properly operated and maintained) no increased indoor emissions can be detected."

A comparable result was reached by a study of the Fraunhofer Institute. It states: "As long as the stove door is closed, substances are not released in significant amounts. Only when adding firewood do emissions enter the indoor air. Then the researchers were able to measure a short-term slight increase in concentration."

So the topic is closed for me, as it doesn’t belong here anyway

This relates to wood burning in general.

The Federal Environment Agency clearly advises against heating with wood.