Hey @higan,

Apologies for the late response. Unfortunately, we can't tell for sure how far they will travel - especially with concrete construction.

The lower frequency and nature of Sub-Ghz does allow for the signal to better penetrate walls and obstacles, however there is still a limit to what the signals can achieve.

You can use more than one hub to establish your Sub-GHz network and then set automations or similar settings so that they follow the same pattern. I would generally look at using multiple hubs as it will increase the stability of your devices, especially if your signal starts falling off. You may as well start with a single hub and consider adding another if it is needed.