

I do NOT want my thermostats to phone home. I don’t see any value of that.
But they are connected to MY smart home system (Hone Assistant), and THAT is accessible from the internet.
I get the remote monitoring and control that I want, and they don’t get any of my data. Perfect!
Yep, all my smart thermostats are zugbee. No phoning home by design, so I don’t have to worry about missing functionality by not giving them internet connection.
And that goes for almost all my smart home. I only have wifi things when I couldn’t find a realistic zigbee option.