3 Best Lennox Smart Thermostat 2025 in the United States

The Lennox S40 (22V24) Smart Thermostat is a modern and efficient thermostat with several appealing features. Its compatibility with various HVAC systems, including high-efficiency setups, makes it versatile for different home environments. The touchscreen interface is user-friendly with a responsive 7-inch display, providing an easy-to-navigate experience.

The thermostat's connectivity is strong, supporting Wi-Fi and integration with Amazon Alexa for voice control, enhancing its convenience. Learning capabilities allow it to adapt to your routines over time, potentially saving energy and cost. The energy reports feature is useful for monitoring and optimizing energy usage.

Geofencing technology is another highlight, automatically adjusting the temperature based on your proximity to home, which is great for energy efficiency and comfort. Remote access via the app ensures you can control the thermostat even when you're away, adding to its convenience. Installation is straightforward, with included components like a smart room sensor and wireless extender aiding in setup and functionality.

The Lennox S40 Smart Thermostat is a high-end, feature-rich device designed for those seeking advanced control over their home heating and cooling systems. It stands out with a 7-inch high-definition touchscreen, providing an intuitive and easy-to-read interface. The system supports various schedules, geofencing features, and a One-Touch Away Mode, making it adaptable to your lifestyle and potentially saving on energy costs. Compatibility is broad, supporting most 24VAC systems, though primarily optimized for Lennox equipment.

The thermostat also integrates seamlessly with smart home systems, including Alexa, Google Assistant, and Apple HomeKit, enhancing user convenience through voice control and remote access via the Lennox Smart app. Installation is straightforward, although it requires a professional HVAC installer to maintain the 10-year warranty, which could be a drawback for DIY enthusiasts. Connectivity through Wi-Fi allows for real-time monitoring and system diagnostics, which helps in maintenance and troubleshooting. However, its reliance on installation by certified professionals could be a limitation for some users. Additionally, the product does not support returning or refunds if not installed professionally, which is a significant consideration before purchase.

The Lennox S40 also includes smart zoning capabilities, supporting whole-home zoning for more customized climate control. Energy reports and advanced accessories, like smart room sensors and air quality monitors, further enhance its functionality. This thermostat is best suited for homeowners looking for robust, smart home integration and advanced features, especially those already using Lennox HVAC systems.

The Lennox 17G74 CS7500 ComfortSense 7500 thermostat is designed for commercial applications and offers several notable features. Its compatibility with various heating and cooling systems makes it versatile, and the full-color LCD touchscreen provides a clear and intuitive user interface. The display shows essential information like current and set temperatures, system status, and optional outside temperature (with an outdoor sensor).

It also includes maintenance reminders for various components, which can be very handy for keeping your HVAC system in optimal condition. The thermostat offers flexible scheduling options, including a special holiday schedule for convenience, and has an 'Away Mode' to save energy when the space is unoccupied.

Additionally, it provides energy reports that show the system's operating duration, helping users track and potentially reduce energy consumption. Connectivity is ensured through Wi-Fi, making it suitable for commercial use.