We have just installed a wood stove as a retrofit in the five-year-old house. Currently, the allowed fine dust levels are still at 80 ppm. In 2024, the limit will be tightened to 40 ppm. I asked the chimney sweep: The next tightening stage will not be about ppm but an automatic combustion control, which can also be mechanical. This minimizes high emissions caused by user errors. It is already in progress. He basically recommended air supply from outside. 8 kW is way too much, and you don't want to add a little wood every half hour. Even 4 kW is plenty, but it's rarely less than that. For us, it is a stove from Nide in Sweden. The combustion air control is purely mechanical via a bimetal strip. The delivery time was 4-5 months two weeks ago. One week later it was 6-7 months, but I insisted on a demonstration model for obvious reasons, it doesn’t affect us. Buying wood was more like hunting than buying, I needed several days to find some and barely managed with a bit of luck. Many greetings Gabriele