{"product_id":"lennox-s40-22v24-smart-touchscreen-thermostat-3h-2c-wi-fi","title":"Lennox S40 | 22V24 | Smart Touchscreen Thermostat | 3H\/2C Wi-Fi","description":"\u003ch1\u003e\u003cstrong\u003eLennox Communicating Systems \u0026amp; Smart Control\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe Lennox S40 Smart Thermostat (Cat # 22V24) is the premium command center for high-performance Lennox communicating HVAC systems. Unlike standard thermostats, the S40 acts as a diagnostic hub that automatically configures connected Lennox equipment for peak efficiency. It is designed to manage temperature, humidity, and indoor air quality through a single, high-definition interface, ensuring the safest and most efficient operation of your home's climate system.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Performance \u0026amp; OEM Reliability\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eOperating on a 24V digital communication bus, this genuine OEM Lennox control provides precision that universal retail models cannot replicate. Being a \"Genuine OEM\" part ensures zero vibration in the digital signal, perfect electrical compatibility with inverter-driven systems, and a precision fit on the wall plate. With built-in Wi-Fi and a 7-inch HD color touchscreen, it delivers real-time system health monitoring and remote access without the risk of software lag or hardware mismatch.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features and Function:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Communicating Control:\u003c\/strong\u003e Automatically detects and optimizes Lennox variable-capacity equipment for maximum energy savings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability:\u003c\/strong\u003e Engineered specifically for Lennox RSBus systems to ensure seamless data flow and zero communication errors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Safety Integration:\u003c\/strong\u003e Monitors system sensors in real-time to provide maintenance alerts and safety shut-offs before major failures occur.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Smart Hub:\u003c\/strong\u003e Direct-fit design that integrates with Smart Room Sensors and the Lennox PureAir S air purification system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details and Key Specifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 22V24 (Model S40)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Lennox (Genuine OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Communicating Smart Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStages:\u003c\/strong\u003e Universal 3 Heat \/ 2 Cool (Communicating or Conventional)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e Wi-Fi \/ Bluetooth \/ Apple HomeKit \/ Alexa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotation\/Orientation:\u003c\/strong\u003e Horizontal Wall Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 1.2 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e🛠️ HVAC DEPOT PRO TIP: The Shielded Signal Check\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eWhen installing the S40 on a high-efficiency communicating system, always verify you are using 18-gauge shielded thermostat wire. Stray electrical interference from high-voltage lines can cause \"lost communication\" errors; using shielded wire and grounding the drain wire at the indoor unit ensures a clean, stable signal to the S40 touchscreen.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded Part:\u003c\/strong\u003e 15X98\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Model:\u003c\/strong\u003e iComfort S30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Number:\u003c\/strong\u003e 22V24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawing Number:\u003c\/strong\u003e 106316-01\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eModel Compatibility:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSLP99V, SL280V, EL296V, EL196E, CBA38MV, CBX40UHV, CBX32MV, XP25, XC25, XP20, XC20, EL18XPV, SL25XPV, SL18XC1, EL17XC1. (Note: Conventional non-communicating units require the 22X18 Equipment Interface Module).\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":52451507765611,"sku":"22V24-LEN-S40-8806","price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/original_44846ea4-6c01-469c-9818-a5c4315ea529.png?v=1760124346","url":"https:\/\/tophvacparts.com\/products\/lennox-s40-22v24-smart-touchscreen-thermostat-3h-2c-wi-fi","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}