Lennox Smart Thermostat Manuals
Select your Lennox model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Lennox smart thermostats by model number
| Model | Description | Certified |
|---|---|---|
| 30L27Lennox M40 Smart Thermostat | Wi-Fi smart thermostat | December 2025 |
| E40 Smart ThermostatLennox E40 Smart Thermostat | Wi-Fi smart thermostat | February 2026 |
| L40 Smart Thermostat | Wi-Fi smart thermostat | September 2024 |
| iComfort M30 Smart Thermostat | Wi-Fi smart thermostat | September 2020 |