You can set the Frost Temperature on the Settings page in the App or Web Interface.
When the Thermostat is set to Off mode, it will still ensure the room temperature does not fall below the selected frost temperature.
How do I set the Frost Temperature?
Set the Frost Temperature in the App or Web Interface under Settings. When the Thermostat is in Off mode, it will continue to protect the room by ensuring the temperature does not drop below your chosen frost setting.