Here the chimney has just been built up. In my opinion, this would work like this?!
That is completely wrong, the chimney is a kind of room divider between dining and living areas on the ground floor, or am I mistaken? Then it would never exit at this spot upstairs but directly by the bed, right in the middle of the bedroom...
Unfortunately, I am not a chimney builder, so I cannot give you the details.
This is not a detail, this is an essential, that smoke and exhaust gases, in physics, met with deaf ears under the excuse of being laypersons and therefore must comply with certain laws.
So, what I also noticed ... The bedroom on the south side ( warmth ) and the bathroom, which should be the warmest and brightest in the morning, is on the north side?