Airthings 325 Corentium Home 2 vs Aranet4 HOME

Aranet4 HOME takes the win with its outstanding owner rating, up to 4 years of battery life, extra pressure sensor and fuller alert set. Airthings 325 Corentium Home 2 counters with a 5-year warranty, broader smart home support and a hub option, and it is the only one of the two that measures radon.

The gas they watch. The Airthings 325 Corentium Home 2 is a radon monitor for basements, ground floors and mitigation tracking. The Aranet4 HOME is a CO2 monitor for ventilation in bedrooms, offices and classrooms, and is portable enough for travel. Both also report temperature and humidity.

Both are good but different. The Aranet4 HOME uses an always-on e-ink screen with color-coded CO2 zones readable in any light. The Airthings 325 Corentium Home 2 uses an LCD showing rolling radon averages with simple Good, Fair or Poor indicators.

The Airthings 325 Corentium Home 2 works with Google Home, Alexa, Home Assistant and IFTTT, and can reach the cloud through an Airthings Hub via SmartLink. The Aranet4 HOME integrates with Home Assistant only, with no Wi-Fi or cloud service of its own.

Choose Airthings 325 Corentium Home 2 if radon is your priority: it delivers continuous, easy-to-read radon averages, about 3 years of battery life, a 5-year warranty and wide platform support for a radon monitor.

Choose Aranet4 HOME if you want the reference portable CO2 monitor: superb accuracy from its NDIR sensor, up to 4 years on batteries, a crisp e-ink display, onboard history and Home Assistant support. It is the better pick for ventilation, focus and travel use.