The whole thing ultimately has an impact on indoor air quality. The fact that we now spend a large part of our time indoors is certainly a second major argument, why it is correspondingly important, elementary, to consciously think about developing concepts here. How do we achieve the best possible, optimal indoor air quality.

What is a fallacy that we encounter again and again is that we are all equipped with our sense of smell, which warns us of hazardous substances and pollutants. Unfortunately, you have to say no. Many of the existing hazardous substances cannot be identified by their smell.

A good example, very pragmatic, please not to try it yourself, is the repeatedly suggested warning against grilling in rooms. Open fire in closed, once again the link to the hermetically sealed energetically optimal buildings. Open fire in such a room causes you to suffer carbon monoxide poisoning that makes you smell 0.0. I think you can remember that very well figuratively that our nose unfortunately lets us down here, which we simply do not perceive with our nose quite a few, sometimes deadly hazardous substances when they exceed a critical concentration as well as creeping processes of many modern exhalations.

There are now a number of test engineers who can verify the whole thing with appropriate measuring devices. So if you have a renovation, it's certainly interesting to say that you take a measurement in advance. What hazardous substances might be in your building fabric? Where is it important to look closely? Where is it important to react actively?