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Lennox S40 Smart Thermostat

By Lennox International, Inc.

The Lennox S40 Smart Thermostat is a sophisticated control system designed to maximize the performance of Lennox HVAC equipment. It features a vibrant 7-inch color touchscreen, a modern design, and a glossy finish, offering an aesthetic upgrade from older thermostats. The S40 communicates with compatible Lennox furnaces, air conditioners, and heat pumps, allowing for fine-grained control over the HVAC system’s output, such as modulating fan speed and adjusting heating or cooling elements

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Product Details

  • Firmware Version 04.38.0081
  • Hardware Version A
  • Certificate ID CSA2592BMAT47229-24
  • Certified Date 09/24/2025
  • 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
  • Product Type End Product

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