Currently the most used way to connect to a Zehnder system is by doing a technical intervention by connecting on the 10volt switches of the machine.
However there is a comfoconnect plug that offers full acces to the device.
But I don’t see any use of it by Anthem
There is a published api :
Somebody even wrote a bridge for it in openhab:
It would open so many doors, it would not only be able to control the machine, but the sensors could also be used to automate other things.
The Zehnder ventilation systems has sensors for:
Indoor temperature and humidity
Outdoor temperature and humidity
It would be great if the API could be used instead of the 10volt approach