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Do I need 2 ecobee thermostats?

If I buy a newer ecobee model, do I need to replace my thermostats? It is not possible to say no. If you already own an ecobee4 and would like to purchase a new model, our thermostat models are compatible with each other. You don't need to replace your ecobee4 to use the SmartThermostat with voice control.

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