
It would be useful a complete REST API to read historical data for all the parameters and then to perform specific actions, such as turn on/off devices, change speed etc.
This would be great!

This would be really great
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Ideally this also includes control/sensor data of the GRE (Ground Heat Exchange) Unit from Zehnder Comfofond…
And please allow for an API that can be used locally, without using external (cloud) servers.
Yes, absolutely.
Cloud service are not safe enough for fully home integrations with migration of locking doors, cameras and so on…
I preferred only local running services in the own, not on internet connected, only local networks.
Yes, no cloud service sould be needed.

Please also include the ComfoFond Ground Heat Exchange module - to provide option to read the sensor values and also control (on/off)
Yes, all option, sensor and action should be possible without cloud.
On local isolated networks, there is a local server to collect all needed data