Lennox S40 22V24 Smart Thermostat - 7-Inch Touchscreen, Communicating, WiFi, Up to 3 Heat / 2 Cool

The Lennox S40, this communicating smart thermostat serves as the central control for compatible Lennox heating and cooling systems. Carrying catalog number 22V24, it features a 7-inch capacitive touchscreen and built-in WiFi for full programmable temperature management. The S40 automatically recognizes connected Lennox communicating equipment to simplify setup and maintain efficient operation across up to 3 stages of heating and 2 stages of cooling.

Key Features & Benefits

• 7-inch capacitive touchscreen provides direct, easy-to-read temperature and schedule control
• Built-in WiFi enables remote monitoring and adjustment through the Lennox Smart Thermostat app
• Communicating design auto-detects compatible Lennox equipment for streamlined configuration
• Programmable scheduling supports custom heating and cooling routines with geo-fencing and away settings
• Supports optional Smart Room Sensors and iHarmony zoning for whole-home comfort across multiple zones

Product Specifications

• Catalog Number: 22V24 (Model S40)
• Display: 7-inch capacitive touchscreen, 1280 x 800 resolution
• Connectivity: WiFi enabled, communicating control
• System Capacity: Up to 3 heat / 2 cool stages
• Wiring: 4-wire standard thermostat wiring (18-22 AWG shielded recommended for communication terminals)
• Dimensions (with subbase): 5 x 7-1/4 x 1 in.

Replacement Compatibility

This thermostat is designed for Lennox communicating residential HVAC systems and connects to all Lennox communicating products. It serves as a direct replacement for earlier Lennox communicating thermostats, including iComfort S30-era controls and the 15X98. The one-piece design installs without the separate wireless hub used by older S30 systems. When paired with the Lennox Equipment Interface Module (22X18), it also works with most standard 24VAC furnaces, air conditioners, air handlers, and heat pumps rated up to 3 heat and 2 cool stages. Note that it will not control communicating equipment from any brand other than Lennox.

Discover the Perfect Replacement

Restore full smart control to your Lennox system with this direct S40 replacement. Confirm your equipment compatibility, place your order today, and get your home comfort system back to efficient, reliable operation with fast shipping.

During the checkout process, you can choose from expedited services such as overnight delivery to standard ground shipping. We aim to ensure your order is delivered promptly and reliably, wherever you are.

All returns must be made within 30 days of purchase with the invoice. (After 30 days, Interlight credit only, Minimum 25% restocking fee, no returns after 60 days, special items order just for you are not returnable.)

At Interlight, your satisfaction is our priority. We offer a 30-day money-back guarantee on eligible products, provided they are returned in resalable condition with the original invoice.