How do I start using the Smart Air Quality Monitor?
FAQ , Air Quality , Troubleshooting Modified: March 19, 2026
Install the Lennox Home App which, connected to the Lennox S40 Smart Thermostat, allows you to monitor and control air quality from anywhere.
The Smart Air Quality Monitor will collect data on fine particles (PM2.5), carbon dioxide (CO2) and volatile organic compounds (VOC) levels inside your home.
The Smart Air Quality Monitor transmits the data to the Lennox S40 Smart Thermostat, which analyzes the data and displays air quality level on the thermostat's display and on Lennox Home App.
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