Take home comfort to the next level.
Complement HVAC systems with our suite of technologically advanced accessories to more precisely and efficiently maintain the temperature and air quality in the home. The S40 Smart Thermostat, the Smart Air Quality Monitor, the Smart Room Sensor, and the Wireless Extender, altogether, is the most advanced accessories package available that delivers next level perfect air.
Smart Air Quality Monitor
S40 Smart Thermostat
Smart Room Sensor
Wireless Extender
Lennox Smart Air Quality Monitor
An air quality monitor that provides alerts, recommendations, and triggers air cleaning on demand.
The Lennox Smart Air Quality Monitor is the only monitor available that enables on-demand ventilation, purification and filtration based on real-time air quality readings.
Product DetailsLennox Smart Air Quality Monitor
Lennox S40 Smart Thermostat
Unlike most smart thermostats, the Lennox S40 Smart Thermostat is more than a temperature regulator. It’s the command center for the entire system, with the incredible ability to monitor sensors throughout the home and in all the equipment. From detecting air pollutants and customizing comfort by room to providing maintenance and service reminders, it will even automatically alert homeowners if their system goes out of tune and allows them to remotely share diagnostics with their Lennox dealer. The Lennox S40 Smart Thermostat not only provides the most precise and perfect air, it also gives peace of mind to more precisely and efficiently maintain the temperature and air quality in the home.
Precise Comfort Plus works with Lennox digital variable-capacity equipment to offer the highest level of comfort and overall system performance.
Feels Like™ considers the humidity levels to deliver the temperature homeowners want to feel, rather than the temperature that was set.
Schedule IQ combines with Smart Away™ Mode to learn homeowners routine and create an energy-optimizing schedule of operation
Advanced Diagnostics and Remote Sharing protects the system at peak performance with advanced diagnostics that can be remotely shared with Lennox dealer to troubleshoot issues and avoid unnecessary service visits.
Monitor temperatures and schedules from anywhere in the world using the Lennox Smart Thermostat app on a smartphone or tablet. Effortlessly integrates with a range of smart home devices—from premium smart home systems like Control4 to popular virtual assistants like Amazon Alexa and Google Assistant.
Homeowners can view overall system performance details and more when they opt in for monthly performance report emails.
Product Details
Lennox S40 Smart Thermostat
Lennox Smart Room Sensor
Perfectly balanced temperatures across rooms.
The Lennox Smart Room Sensor helps homeowners dial in a more perfect environment by providing accurate temperature and humidity readings to the S40 Smart Thermostat and telling it how to balance temperatures across the rooms where the sensor is placed.
Product DetailsLennox Smart Room Sensor
Lennox Wireless Extender
Greater range. Greater performance.
The Lennox Wireless Extender improves the connection between the S40 Smart Thermostat, Smart Room Sensor and Smart Air Quality Monitor, in larger homes or areas with reduced coverage or “dead spots”.
Product DetailsLennox Wireless Extender
Smarter Together
A fully communicating home comfort system allows homeowners to achieve their ideal whole home comfort and save on energy bills. This responsive system is controlled by a command center that not only acts as a thermostat, but also seamlessly communicates back and forth with digital equipment and sensors. It automatically adjusts its operation in tiny increments to precisely maintain temperature and humidity, delivering the ideal amount of heating and cooling needed to maximize efficiency and reduce energy waste. It can even diagnose issues and alert homeowners if their system goes out of tune. This technology was designed to deliver the most precise and perfect air possible.
Ultimate Comfort SystemSmarter Together
Sales Resources
Grow your sales of the S40 Thermostat and the smart accessories with new sales resources designed to help you win at the kitchen table. Use the sales sheet to introduce homeowners to the new smart products and how they work smarter together with the S40. Watch the sales training modules to learn details of how the new smart products work. In the Hightail assets you will find all items needed to help you promote the smart products.
Sales Resources
Technical Resources & Training
Find our latest installation guides, training videos and troubleshooting tips for installation and service of the S40 and the new smart accessories. Also, download the Lennox S40 Virtual Trainer to experience the new features of the Lennox S40 Thermostat on your PC.
- Product Technical Documents
- Product Installation Videos
- Troubleshooting Tips
Technical Resources & Training
Control the Lennox S40 Thermostat and accessories from anywhere.
The Lennox S40 Thermostat App allows homeowners to remotely access and control their Lennox S40 Smart Thermostat and advanced accessories. Whether it’s adjusting the temperature or schedule, monitoring indoor air quality or balancing room temperatures, the control is all at their fingertips.
Installing or servicing a system with the Lennox S40? Get it done right.
With the Lennox Smart Tech App, you'll have the latest technology to more quickly and easily install and service a fully communicating home comfort system with the Lennox S40 Smart Thermostat. You can reliably run tests, diagnostics, and change system settings directly from your smartphone without the back and forth from equipment to thermostat.
Service in Tune with Perfection
With detailed remote diagnostics, you’ll save time and money by already knowing the issues at hand, having your techs armed with the parts needed before the truck rolls, and reducing the time spent at your customer’s home. Plus, you now have remote diagnostic technologies, product schematics, technical product specs, warranty information, and Error Code Lookup integration — easily accessible on your mobile device, tablet, or desktop computer.