How far can a Wireless Extender be from the S40 Smart Thermostat?
FAQ , Thermostats , Troubleshooting Modified: March 19, 2026
The S40 Smart Thermostat connects with the Smart Room Sensor via proprietary Bluetooth protocol, called a BLE Mesh. The range between the S40 and any smart device is approximately 70 feet. When you need to improve the connection, you will receive an alert for low signal strength. Call your Lennox dealer to install a Lennox Wireless Extender to increase the connection strength.
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