Airthings Wave Plus vs Amazon Smart Air Quality Monitor

Airthings Wave Plus wins overall with six sensors including radon and CO2, a 5-year warranty, four smart home integrations and a fuller alert set. Amazon Smart Air Quality Monitor is far more affordable and adds PM2.5 and carbon monoxide sensing, but it is Alexa-only with a 1-year warranty.

Sensor mix and ecosystem. The Airthings covers radon, CO2, VOCs, temperature, humidity and pressure across Google Home, Alexa, Home Assistant and IFTTT. The Amazon unit covers VOCs, PM2.5, carbon monoxide, temperature and humidity but works only inside Alexa. Radon and CO2 belong to the Airthings; particulates and CO to the Amazon monitor.

The Airthings Wave Plus runs about 1.5 years on two AA batteries but is Bluetooth-only, needing an Airthings Hub via SmartLink for remote data. The Amazon Smart Air Quality Monitor connects over Wi-Fi for remote access through Alexa, but must stay plugged in over Micro USB.

The Amazon Smart Air Quality Monitor is the standout here: it can trigger Alexa routines straight from temperature, humidity, CO, particulate or VOC readings, for example switching on an air purifier. The Airthings Wave Plus can feed automations through Home Assistant or IFTTT instead.

Choose Airthings Wave Plus if you want one battery-powered device covering radon, CO2 and VOCs with long-term history, wide platform support and a 5-year warranty. It suits homeowners who care about radon and ventilation, not just visible pollution.

Choose Amazon Smart Air Quality Monitor if you run an Alexa home and want cheap, responsive tracking of particulates, VOCs and carbon monoxide, with routines that react to your air. It cannot measure radon or CO2, and it is not a substitute for a certified CO alarm.