I use the Maestro line by Stelpro of line thermostats. they don’t play with Alexa, Siri etc. but they have a phone app that does everything I need. As said, not cheap ~$100 each.
You can get a SPST relay with a 24 volt coil on Amazon for $15.00 A 24 volt transformer is less than $20. And you can then pick a thermostat of your choice. I use a Ecobee. I can give it commands via Alexa or Home Assustant
I use the Maestro line by Stelpro of line thermostats. they don’t play with Alexa, Siri etc. but they have a phone app that does everything I need. As said, not cheap ~$100 each.
You can get a SPST relay with a 24 volt coil on Amazon for $15.00 A 24 volt transformer is less than $20. And you can then pick a thermostat of your choice. I use a Ecobee. I can give it commands via Alexa or Home Assustant
Same, but they do work well with IFTTT