Wireless or wired SmartHome? What about the radiation?

NO, we are normal people :-D

Then forget about the radiation completely. There is only "right" or "not at all" and you don't want "right".

On the other hand, as I understand it, with a bus system you then need a separate cable for each switchable light. With Shellys or WLAN lamps, for example, you can simply switch directly at the device itself, so a separate cable is not necessary, it could also be branched power lines.

For each lighting circuit or roller shutter, yes.

@ALL: Is a bus line really worth the extra effort?

For your application probably not. With the bus, partial areas don't make much sense, in your case the Shellys should be completely sufficient.

For your intended use, probably not. Partial areas don't make much sense in a bus system; in your case, the Shellys should be completely sufficient.

I wouldn't call it partial areas now. It only makes limited sense to make the socket, into which later the vacuum cleaner or a coffee machine etc. will be plugged, remotely controllable.

Or how do you come to this statement?

I wouldn't call it partial areas now.

What you want to "automate" is only a very small part of home automation "Smart Home". You can implement it with a bus system, but it's like putting a V8 engine into a Smart car. The potential is not being utilized. If you really want it to be smart, much more is involved. In this respect, the statement

the Shellys should be completely sufficient

fits quite well.

Ok, thanks for your feedback.

I just spoke again with the heating installer. Due to the low additional cost (~1000€), I would also make these controllable remotely regarding room temperatures.
He suggested a system from AFRISO, the AFRISOHome Gateway, which is apparently distributed through Pfeiffer & May.
It even communicates via ENOCEAN.

Does anyone know it? How compatible is it then? Or am I limiting myself with it?

Best regards

You always have radiation, and the better the reception is, the less radiation is present.

Enoacen, Zigbee, Loxone Air transmits with very low power and not continuously.

When it comes to the topic of radiation, you shouldn't have a smartphone, a cell phone, not even a printer because they also transmit via WLAN and Bluetooth, no car, etc. SmartTVs especially not, because they also transmit via WLAN and Bluetooth, even if you deactivate it.

If it’s wireless, then I would choose Loxone Air (as said, wireless) because the system can also communicate directly with the heating system depending on the manufacturer.

Radiation would only be harmful to health if it were ionizing radiation. However, electromagnetic radiation only becomes ionizing at wavelengths below approximately 250 nm, which would put us in the petahertz range. The rest is uncertainty caused by esoteric practitioners and clever salespeople trying to sell useless nonsense. In the military sector, there have been cases of cancer among radar technicians, but these were not caused by the electromagnetic radar radiation itself, rather by the X-rays that were generated as a side effect by the transmitters at that time.