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Lennox

Lennox S40 (22V24) Smart Thermostat, Touchscreen, WiFi, Communicating System Control, Programmable, High Efficiency, Geo-Fencing, Remote Access, Wi-Fi and Alexa Enabled, Easy Installation

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Availability: Only 1 left in stock, order soon!
Fulfilled by Ecostar Energy - MKZUSA
Arrives Apr 30 – May 2
Order within 7 hours and 54 minutes
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Description

Product Overview Lennox S40 Smart Thermostat, Touchscreen, Communicating, WiFi, Programmable, 3 Heat/2 Cool The S40 Smart Thermostat recognizes and connects to all Lennox communicating products to automatically configure and control the heating/cooling system (based on user-specified settings) for the highest level of comfort, performance and efficiency. S40 Smart Thermostat also recognizes model and serial number information for Lennox digitally communicating products to simplify system setup. Learn more about the S40 Smart Thermostat below or visit the S40 resource hub for all your dealer needs. Complement your home comfort system with our suite of technologically advanced accessories to more precisely and efficiently maintain the temperature and air quality in your home: Smart Room Sensor, Smart Air Quality Monitor and Wireless Extender Advanced digital controls in specific heating and cooling units and the PureAir S Air Purification System communicate information about various operating parameters to the thermostat to constantly maintain the most efficient operating conditions possible Additional conventional (non-communicating) indoor air quality comfort products (Healthy Climate Humidifiers, Humiditrol Enhanced Dehumidification Accessory, Healthy Climate HRV/ERV Heat/Energy Recovery Ventilators, Fresh Air Damper, Healthy Climate Germicidal Lights) can be added to the system for a complete total- comfort system Conventional HVAC systems (non-communicating) can be controlled by the S40 Smart Thermostat with the addition of the optional Equipment Interface Module (EIM) Optional Smart Zoning System (iHarmony, for specific HVAC systems) allows whole-home zoning (up to 4 zones) with complete control from the S40 Smart Thermostat and individual In-Zone Thermostats A simple easy-to-use touchscreen allows complete system configuration. Scheduled maintenance alerts, system warnings and troubleshooting are also displayed on thermostat screen Up to four separate schedules are available plus Schedule IQ One-Touch Away Mode - a quick and easy way to set the cooling and heating setpoints while away Smart Away - Schedule IQ uses geo-fencing technology to determine when the homeowner is within a predetermined distance from the home to operate the system when leaving, away and arriving Weather-On-Demand - live up-to-date weather data and seven-day forecasts Easy to read 7 in. high- definition color display (measured diagonally) New Lennox Smart Technician app allows for quick and easy install of S40 Smart Thermostat and the new smart accessories Installer setup screens allow quick and simple system configuration without a manual Installer can also run tests on complete system or individual components for easy maintenance and troubleshooting Service Dashboard features online real-time monitoring of installed smart digitally enabled systems Uses 4-wire standard thermostat wiring. We highly recommend using 18 - 22AWG shielded thermostat cable for communications terminals (I+ and I-) which will help eliminate any noise interference. Note: The Lennox S40 Smart Thermostat with Equipment Interface Module (22X18) will work with most 24VAC furnaces, air conditioners, air handlers and heat pumps (up to 3 stages of heat and 2 stages of cooling), EXCEPT IT WILL NOT WORK with any brand of communicating HVAC equipment other than LENNOX.

Brand: Lennox


Model Name: S40


Special Feature: Programmable


Color: Black


Brand: Lennox


Model Name: S40


Special Feature: Programmable


Color: Black


Temperature Control Type: Automatic


Connectivity Technology: Wi-Fi


Included Components: Smart Room Sensor, Smart Air Quality Monitor, Wireless Extender, Lennox Smart Technician app, Equipment Interface Module (EIM), In-Zone Thermostats


Power Source: Electric Power Source


Voltage: 22 Volts


Shape: Rectangular


Display Type: touchscreen


Finish Type: Glossy


Screen Size: 7 Inches


Control Type: Touch


Control Method: App, Voice


Connectivity Protocol: Wi-Fi


Mounting Type: Wall Mount


Style: Modern


Backlight: Yes


Manufacturer: Lennox


Package Dimensions: 17.6 x 11.57 x 2.99 inches


Item Weight: 1.7 pounds


Item model number: 22V24


Date First Available: June 29, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Apr 30 – May 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Supports my Lennox variable speed system and saved me money
Bought this with all the mixed reviews. Installed it myself since it is a wire for wire replacement ( many videos/instructions on the internet ) at the thermostat for my old iComfort which lost its screen and was only useable with the limited app. This is not an Ecobee or Nest but has plenty of functionality if you care to learn how to program it. While I wanted to get an Ecobee it was not a smart choice for a Lennox variable speed system since a lot of the Lennox function are not supported. Getting this from a dealer with a warranty would have cost me over double what it did to buy it on Amazon and put it in plus they would have wasted my time upselling service contracts, extended warrantied and all the other BS the authoorized dealers push on consumers. It took me 30 minutes to replace the old iComfort and the S40 has been working like a charm. If it breaks in the next few years, I'll buy a new one and still be financially better off. Is this the perfect thermostat ? Is is the smartest one out there ? Is it value for money spent when an Ecobee or Nest is $200+/- ? No, but if you have a variable speed Lennox with all the whistles and bells this is a smart choice as it will help keep your energy costs in check over the long run and thus pay for itself. The seller shipped it quickly, brand new ( not a return) and it arrived intact and ready to unbox and install. ... show more
Reviewed in the United States on June 21, 2024 by TR
    • 10f thermostat replacement
This product worked very well. Set up was not difficult. Seems to even work better than the original unit before that one quit functioning properly. Also the discounted price was expensive but better than I could find anywhere else.
Reviewed in the United States on November 3, 2024 by TMRealtor
    • Yes, this is the replacement to the older screens and it's easy to install.
Yep, I had the older Lennox touchscreen unit...sorry, I forget the old model number...that experienced the dreaded dead screen. Like many other users, I was dismayed to see the replacement model recommended for professional install, raising the cost beyond kind words. Well, install is pretty easy. With the right instructions, it took me five minutes with a small screwdriver. No biggie. This thermostat works to control my lennox HVAC. The screen has some nasty lag, so it's actually easier to use the app on the phone sometimes. There are some flashy features, like the ability to use your own photos for the background and smooth app integration. I can even set it to give me a monthly summary of system usage, which is not important, but it's kinda fun. It has easy to check weather forecasts built in (as though we walk to the thermostat to check the forecast). It's also got highly programmable settings for single/multi zone and times of day that's all easy to customize. Most importantly, if you're looking for the current replacement to the touchscreen Lennox thermostats from 5-10 years ago, this was the right unit for me. Installing it was easy for me, no technician required, since it uses the same wires as my old thermostat required. Other brand smart-thermostats seem to require other wiring. So, even though the unit is pricey, it was the right way to fix my system myself, and avoid costlier technicians doing what I can with a single screwdriver. In summary, it works, it's easy to install for Lennox HVAC systems, and it has a few features. If you're checking out this model because it's the current replacement for your older Lennox thermostat, yes choose this and install it yourself. ... show more
Reviewed in the United States on August 20, 2024 by M. Acker
    • if you have to replace your Lennox thermostat, this one works
If you are like so many others who invested in a new Lennox HVAC with an iComfort thermostat that stopped responding once the warranty is out, you will need to upgrade to the current version of thermostat. I had purchased a Nest only to find out that Lennox has a proprietary system that only works (well) with their own very expensive proprietary thermostat. I had a service person come out to replace the dead unit only to be told it would be over $2K for him to replace it. However, he was able to tell me which thermostat I needed to buy and gave me basic instructions if I chose to install it myself. Shopping on Amazon, there are several vendors selling this thermostat and I chose this one with a price at almost half of all the rest. I watched a couple of videos on how to install and chose to save money and do it myself. I took pictures of the wiring and followed the instructions. The only hiccups I had were getting the thermostat to connect to the mobile app and wondering what to enter for a dealer code/phone number. There are a lot of features on this thermostat. You can set auto high and low temps depending on the time of day. The mobile app will keep trying to reset the high temp to 78 or 84 and going back and forth to the screen, I was finally able to convince it that I really did want my daytime temp to be 72 and night time temp to be 68. This house is never empty and there is no thermostat on the second floor. It gets very warm working up there. You can set the device to show the actual temp inside and outside as well as the "feels like" temp. You can set the default screen to a photo if you like. Overall, it appears to be working after less than an hour of set up. I would drop stars for the price since this is way over priced compared to other thermostats and I really dislike that Lennox produced such a poor quality thermostat that had to be replaced with their newer version at an exorbitant price. ... show more
Reviewed in the United States on April 3, 2025 by M. Schaefer
    • Too expensive, but the thermostat works fine
Lennox does not care about its customers, only its dealers. You can install this yourself, but I had to use the online service "JUST ANSWER" to get the job done. I have a Lennox AC/ heat system and needed to replace a failed Lennox thermostat. Lennox has made their systems proprietary so in order to use a different brand thermostat you need to do some rewiring of your Lennox system. If your Lennox system has all the bells and whistles you may need a Lennox thermostat to make all that work. I recommend JUST ANSWER if you want to buck Lennox. I will never buy another Lennox system. ... show more
Reviewed in the United States on January 24, 2025 by Canoe2U

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