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Lennox S40 Smart Thermostat

By Lennox International, Inc.

The Lennox S40 Smart Thermostat redefines home comfort with advanced technology and seamless connectivity. Designed for premium Lennox® communicating systems, it offers precise temperature, humidity, and air quality control. Key features include Feels Like™ temperature adjustment, Schedule IQ™ adaptive scheduling, and Smart Away™ geo-fencing for energy savings. With remote access via the Lennox app, voice control through Amazon Alexa and Google Assistant, and integration with smart home systems, the S40 delivers convenience and efficiency. Built-in diagnostics and proactive alerts help maintain peak system performance, making it the ultimate command center for your home comfort.

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Product Details

  • Firmware Version 04.38.0087
  • Hardware Version A
  • Certificate ID CSA25B3DMAT47759-24
  • Certified Date 10/14/2025
  • Product ID 0x0001
  • Vendor ID 0x1356
  • Compliance Document Download Compliance Document
  • TIS/TRP Tested Yes
  • Specification Version 1.3
  • Transport Interface Wi-Fi
  • Primary Device Type ID 0x0301

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