Schedule IQ Technology

Uses homeowner inputs and Smart Away^® geo-fencing capabilities to learn your routine and create a schedule that maintains comfort when the home is occupied and help save energy when it’s not.

Complete Control at Home or Away

Remote control of your home environment is just one touch or voice command away with the Lennox L40 Smart Thermostat. Monitor temperatures and schedules from anywhere in the world using the Lennox Home app on your smartphone or tablet.

ENERGY STAR^® Certified

Heating, ventilation and air-conditioning (HVAC) equipment with the ENERGY STAR label meets or exceeds federal guidelines for energy-efficient performance.

Access Your Lennox L40 Smart Thermostat From Your Choice of Smart Home Device

The Lennox L40 Smart Thermostat effortlessly integrates with a range of smart home devices—from premium smart home systems like Control4 to popular virtual assistants like Amazon Alexa, Google Assistant and Building36.

Custom Equipment Profiles for Perfect Installs

Thanks to its custom equipment profiles configured by your local Lennox dealer, the Lennox L40 Smart Thermostat can help seamlessly install, service and fine tune your home’s system based on your location and climate. This advanced technology along with its speedy, secure wireless connection allows you to easily and quickly get up and running with the perfect air you’re looking for.

Modern Design, Simple Navigation

The Lennox L40 Smart Thermostat’s four-color, touchscreen display is easy to use, with large, legible fonts and organized screens that make setting your thermostat a breeze. With a slim profile and glass-like finish, it is more attractive on your wall than traditional thermostats.