Controlled residential ventilation + fireplace + kitchen exhaust, does it work?

You should discuss this with your chimney builder; with us, the supply air enters beneath the firebox.

However, regarding the exhaust hood & ventilation, you won't be able to avoid the district master chimney sweep.

What do all the chimney sweeps and flue cleaners actually do when there are only heat pumps someday? I recently saw one’s dog catcher, and it also said energy consulting on it. But surely not everyone who would otherwise have become a chimney sweep can do that, right?

... then they control the exhaust extractor hoods of all the houses with extra fire burners :)

Smoke detector inspection and then the houses with heat pumps also have a chimney sweep again

You should discuss this with your chimney builder; in our case, the supply air leads beneath the firebox.

Regarding the exhaust hood & ventilation, however, you won't be able to avoid the district chimney sweep master.

I contacted him by email and am just waiting to see if any information comes. Otherwise, I'll just call next week :)

There are certainly similar KNX components that make this possible.

With KNX, such a task is an exercise for the apprentice, requires virtually no devices, and you only need a free input and output somewhere. You come up with the logic... it is included everywhere anyway.

It all has to be maintained permanently, doesn't it?

No, it doesn't have to. Electronics are generally maintenance-free.

What do all the chimney sweeps and chimney cleaners actually do when there are only heat pumps someday?

Maybe our grandchildren will experience that... although that is doubtful. There will still be a very long time when there are existing buildings that cannot really be heated economically with heat pumps.