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Lennox S40 Smart Thermostat
Thermostats
The ultimate controller for more precise comfort
Price Guide
$$$$
Warranty
10-Year Limited Warranty
Features
Product Specifications
Feature
Rating
System Compatibility
Amazon Alexa
Allows you to voice control your HVAC system through Amazon Alexa-enabled devices
Allows you to voice control your HVAC system through Amazon Alexa-enabled devices
Google Assistant
Allows you to voice control your HVAC system through Google Assistant-compatible devices
Allows you to voice control your HVAC system through Google Assistant-compatible devices
Programmable
Versatile programming options offer custom comfort and energy savings
Versatile programming options offer custom comfort and energy savings
Smooth Setback Recovery
Senses extreme temperature changes and begins the temperature recovery process up to 2 hours before the programmed time
Senses extreme temperature changes and begins the temperature recovery process up to 2 hours before the programmed time
Smart Away
Uses the GPS in your smartphone to detect when you're leaving, and automatically changes the temperature to a more energy-efficient setting
Uses the GPS in your smartphone to detect when you're leaving, and automatically changes the temperature to a more energy-efficient setting
Schedule IQ
Allows you to only program your thermostat once. Whenever there's a change in your routine, the thermostat adapts heating and cooling to match
Allows you to only program your thermostat once. Whenever there's a change in your routine, the thermostat adapts heating and cooling to match
One-Touch Away Mode
Overrides your regular programming schedule when you're away and automatically turns down heating or cooling to save energy
Overrides your regular programming schedule when you're away and automatically turns down heating or cooling to save energy
Allergen Defender
Monitors the air quality and pollen levels of your local zip code and automatically turns the fan on to clean your home\u2019s air when outdoor levels are high
Monitors the air quality and pollen levels of your local zip code and automatically turns the fan on to clean your home\u2019s air when outdoor levels are high
Feels Like
Similar to the \"Feels Like\" temperature in a weather report, this feature takes into account temperature and humidity to create a comfortable environment
Similar to the \"Feels Like\" temperature in a weather report, this feature takes into account temperature and humidity to create a comfortable environment
Filter Reminder
Reminds you when its time to change the filter
Reminds you when its time to change the filter
Auto Changeover
Decides between heating and cooling operation, depending on indoor temperature
Decides between heating and cooling operation, depending on indoor temperature
Touchscreen
Features a large, easy-to-use display with adjustable brightness
Features a large, easy-to-use display with adjustable brightness
Photo Display
Allows you to display a personal photo as the screensaver of your thermostat
Allows you to display a personal photo as the screensaver of your thermostat
Weather Screen Savers
Themed screen savers on the 7\" HD color touchscreen are designed with graphics that tell you what weather conditions are like outside
Weather Screen Savers
Themed screen savers on the 7\" HD color touchscreen are designed with graphics that tell you what weather conditions are like outside
Dual-Fuel Capability
Increases the efficiency of dual-fuel heating systems by automatically alternating between gas and electric operation
Dual-Fuel Capability
Increases the efficiency of dual-fuel heating systems by automatically alternating between gas and electric operation
Energy Reports
Show how often and how long the heating or cooling system has run for the month
Show how often and how long the heating or cooling system has run for the month
Humidity Control
Works with the whole-house humidity-control systems to adjust the home's humidity level
Works with the whole-house humidity-control systems to adjust the home's humidity level
Remote Capability
Monitor and adjust temperatures and schedules from anywhere in the world using the iComfort App and your smartphone, tablet or other web-enabled device
Monitor and adjust temperatures and schedules from anywhere in the world using the iComfort App and your smartphone, tablet or other web-enabled device
Precise Comfort® Plus
Holds your home's temperature to within 0.5 degree or less when used with premium Lennox\u00ae equipment
Precise Comfort® Plus
Holds your home's temperature to within 0.5 degree or less when used with premium Lennox\u00ae equipment
Emailed Alerts
Provides detailed diagnostics and reminds your Dealer when service is needed
Provides detailed diagnostics and reminds your Dealer when service is needed
Remote Monitoring
Allows Lennox dealers to analyze your system from anywhere via their computer or mobile device
Allows Lennox dealers to analyze your system from anywhere via their computer or mobile device
Remote Troubleshooting
Makes it possible for dealers to use their mobile device to adjust system parameters to fix problems, without ever making a trip to your home
Makes it possible for dealers to use their mobile device to adjust system parameters to fix problems, without ever making a trip to your home
Warranty