Lennox S40 Smart Thermostat

The Lennox S40 Smart Thermostat is built for homeowners who want more accurate comfort control from compatible Lennox communicating equipment. It helps manage temperature, humidity, indoor air quality accessories, and scheduling from one simple control.

Key Features

• Designed for premium Lennox communicating home comfort systems.
• Supports smart scheduling, away modes, and smooth comfort recovery.
• Works with compatible Lennox smart accessories, including room sensors and air quality accessories.
• Voice assistant compatibility may be available depending on the connected setup.
• Professional setup helps confirm wiring, equipment compatibility, and system configuration.

Best Fit

This thermostat is a strong match when upgrading a Lennox communicating furnace, air conditioner, or heat pump system and you want better control over comfort, schedules, and whole-home air quality equipment.