Lennox Industries’ iComfort M30 smart thermostat is the newest addition to the Lennox iComfort smart thermostat family of products, which includes the iComfort S30 and iComfort E30. The thermostat works with Lennox non-communicating HVAC systems, as well as non-Lennox systems, according to company officials. Maintenance reminders let users know when to service or replace filters. The product is Amazon Alexa-enabled and smart-home compatible. A “perfect temp” mode allows homeowners to set the ideal temperature, and the system automatically adjusts heating and cooling to maintain the set temperature, officials say.