Search  for anything...
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

    • Based on 54 reviews
Condition: New
Checking for product changes
$679.99 Why this price?

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: 19 left in stock
Fulfilled by Elm & Vine
Arrives Tuesday, Dec 31
Order within 45 minutes
Available payment plans shown during checkout

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


Specific Uses For Product: Heat Pump, Air Conditioner


Shape: Rectangular


Style: Modern


Finish Type: Glossy


Manufacturer: Lennox


Model Number: 22V24


Brand Name: Lennox


Model Name: S40


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


Screen Size: 7 Inches


Control Type: Touch


Control Method: App, Voice


Connectivity Protocol: Wi-Fi


Backlight: Yes


Connectivity Technology: Wi-Fi


Power Source: Electric Power Source


Voltage: 22 Volts


Special Features: Programmable


Specific Uses For Product: Heat Pump, Air Conditioner


Temperature Control Type: Automatic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 31

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • 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
    • 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
    • BEWARE: NO WARRANTY ON THIS THERMOSTAT, PER LENNOX. 20% RESTOCKING FEE IF RETURNED TO SELLER.
PER LENNOX: - This Limited Warranty does not apply to, nor is any warranty offered by Lennox for, any Equipment or components that have been stolen or have been ordered over the internet, by telephone or other electronic means, unless the dealer or licensed HVAC installer selling the Equipment or components over the internet, by telephone or other electronic means, is also the installing contractor. ... show more
Reviewed in the United States on May 28, 2024 by C M J
    • Lennox S40
Replaced a 10F81 with the S40.
Reviewed in the United States on October 21, 2024 by BobP
    • Better than the S30 but no warranty
I bought and have the Lennox Dealer install 2 of these thermostat to replace 6 years old S30 not working properly. I bought it at Amazon because the Lennox Dealer quoted me 100% more for the same thermostat (installation not included). I like the fact there is no longer a requirement for a hub and the app is much better than the iConfort app I was using. The user interface in the thermostat is hard to use because the touch screen is not very responsive. Other than that it works well, however if it fails the only option is to buy a new one. Although the product description mentions there is a 10 years warranty with registration, Lennox Limited Warranty Terms, in the Exclusions section paragraph 9 specifically mentions that they only will accept a claim if the product was purchased and installed from a Lennox dealer or a licensed HVAC installer, not over the internet, phone or other means. I called Lennox and they confirmed it. Summary: Acceptable replacement for the old S30, very good price but no Lennox warranty. ... show more
Reviewed in the United States on December 8, 2023 by Aldo
    • direct replacement for the Lennox iComfort (10F81) thermostat
I purchased the Lennox S40 Smart Thermostat to replace my Lennox iComfort (10F81) Thermostat which had encountered a display failure (blank screen). The S40 thermostat is indeed a direct replacement for the iComfort thermostat and used the same four wires that were used on the older model. I was able to install the S40 thermostat easily (in about two hours) using the available Lennox apps. I had one question after the installation was complete and it was readily addressed when I contacted Lennox Customer Support. The S40 has only been in use for two days, but I am hopeful it will continue to operate for the remainder of the time that I use this HVAC system. ... show more
Reviewed in the United States on November 14, 2023 by djm
    • overpriced junk beware of lennox
at least it was cheaper here .
Reviewed in the United States on December 6, 2023 by Ron Weaver

Can't find a product?

Find it on Amazon first, then paste the link below.