Airthings 2989 View Radon vs Aranet4 HOME

Airthings 2989 View Radon wins on the overall spec sheet: Wi-Fi for remote access, a 5-year warranty, four smart home platforms and full alerts. Aranet4 HOME counters with a better owner rating, longer battery life and its reputation as the reference portable CO2 monitor, but it is Bluetooth-only and Home Assistant is its only integration.

What they measure. The Airthings 2989 View Radon tracks radon, temperature and humidity, making it the choice for basements and mitigation follow-up. The Aranet4 HOME tracks CO2, temperature, humidity and atmospheric pressure, making it the choice for ventilation in bedrooms, offices, classrooms or travel. Neither covers the other's specialty.

Only on the Airthings 2989 View Radon, which uses 2.4GHz Wi-Fi for remote dashboards, alerts and weekly reports. The Aranet4 HOME is Bluetooth-only, so you read its e-ink screen in person or sync the app nearby, with Home Assistant as the workaround for remote access.

Both are excellent but the Aranet4 HOME leads with up to 4 years on two AA cells. The Airthings 2989 View Radon manages about 3 years on six AA batteries and adds a USB-C option if you prefer to keep it permanently powered.

Choose Airthings 2989 View Radon if radon monitoring is the goal and you want readings, alerts and weekly reports from anywhere, plus wide smart home support and a 5-year warranty. It also doubles as a hub for other Airthings sensors.

Choose Aranet4 HOME if CO2 and ventilation are what you care about: it is the better-reviewed device, highly portable, lasts years on batteries, and its NDIR sensor is widely treated as the accuracy benchmark. Pick it for desks, bedrooms, classrooms and travel rather than for radon.