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
