How many sensors can i add to one s40 thermostat?
FAQ , Thermostats , Troubleshooting Modified: March 19, 2026
Based on the information provided, you can use up to six (6) smart room sensors per single s40 smart thermostat ble mesh network. however, you can only have a total of six (6) smart accessories to one s40 smart thermostat. so, if you have a smart air quality monitor or a wireless extender, those will count towards your 6 smart accessories. for more detailed information, please refer to the document titled 'request2.pdf' in the lennox tech pubs faqs.
For more information or a visual representation of steps please reference our user guide here
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