Airthings Wave Mini vs Ecobee Smart Thermostat Premium

The Ecobee Smart Thermostat Premium wins overall, with a higher owner rating, dual-band Wi-Fi, a 4-inch color touchscreen, support for all six major smart-home platforms and more built-in sensors (VOCs, CO2, temperature, humidity and occupancy). The Airthings Wave Mini is cheaper, has a longer warranty and adds a mold-risk indicator, but it is a much simpler device.

Form factor. The Ecobee Smart Thermostat Premium is a wired smart thermostat that also monitors air quality and controls your HVAC, while the Airthings Wave Mini is a small, battery-powered VOC and mold sensor you can move between rooms. One replaces your thermostat, the other is a standalone monitor.

The Ecobee Smart Thermostat Premium. It reads VOCs, CO2, temperature, humidity and occupancy and acts on them through your HVAC system, whereas the Airthings Wave Mini measures VOCs, temperature and humidity plus mold risk but cannot control heating or cooling.

Not quite. The Ecobee Smart Thermostat Premium supports Google Home, Alexa, Apple HomeKit, SmartThings, Home Assistant and IFTTT, while the Airthings Wave Mini works with Google Home, Alexa, Home Assistant and IFTTT but not HomeKit or SmartThings.

Homeowners who want a smart thermostat that also monitors air quality (VOCs and CO2) and occupancy, with a color touchscreen and support for every major platform, all in one wired fixture.

Buyers who just want an affordable, portable sensor for VOCs and mold risk with a long 5-year warranty, and who do not need a thermostat or built-in HVAC control.