Use a Venstar to convert your 3 wire to a 4 wire system and it should work with these thermostats.
You can also consider using a CT-100 Z-Wave Plus thermostat from @TheSmartestHouse
Use a Venstar to convert your 3 wire to a 4 wire system and it should work with these thermostats.
You can also consider using a CT-100 Z-Wave Plus thermostat from @TheSmartestHouse