I have a forty-year-old flat, I have been living in it for twenty years, like mine, but it does not release me from control. The cooperative to which I am subject is, rented out, I don't know, but twice a year there are gas fired and chimney sweep inspections, there are requirements and probably to make it safe. I have just a grille and it doesn't bother me at all. A neighbor's colleague has four holes in the bathroom door. I do not know the diameter, but I saw the chimney sweep's fan, I do not know the name of this thing. Due to the fact that we have been living here for some years, I wanted to see what it looks like at my friend's.
So it was just as good on the chimney sweep. The apartment is in a block of flats, we are separated by four frames, and I don't think the chimney sweep was wrong, maybe you have something wrong with this circulation if he noticed you. I live on the fourth floor, a colleague on the first, if it is relevant in this case.