Airthings 2950 Wave Radon vs Aranet4 HOME

On overall package, Airthings 2950 Wave Radon wins with its 5-year warranty, hub option via SmartLink, support for Google Home, Alexa, Home Assistant and IFTTT, and fuller alerts. Aranet4 HOME counters with a higher owner rating, an e-ink display and roughly 4 years of battery life, and it remains the go-to choice for CO2 specifically.

What they measure. The Airthings 2950 Wave Radon is a radon monitor, ideal for basements and mitigation tracking, while the Aranet4 HOME is a dedicated CO2 monitor for ventilation, classrooms, offices and travel. Both also track temperature and humidity, and the Aranet adds atmospheric pressure, but neither can do the other's core job.

The Aranet4 HOME has an always-on e-ink screen showing CO2, temperature, humidity and pressure at a glance with color-coded zones. The Airthings 2950 Wave Radon has no screen; you wave a hand over it to light a green, yellow or red ring and open the app for exact numbers and history.

The Aranet4 HOME, clearly: its two AA batteries are rated for about 4 years thanks to the low-power NDIR sensor and e-ink display. The Airthings 2950 Wave Radon runs roughly 1.5 years on its two AA batteries, which is still low-maintenance but a shorter cycle.

Choose Airthings 2950 Wave Radon if radon is your concern: it monitors continuously, keeps history in the app, can join an Airthings Hub for online access, works across Google Home, Alexa, Home Assistant and IFTTT, and carries a 5-year warranty.

Choose Aranet4 HOME if you care about CO2 and ventilation, want a portable monitor you can carry between rooms or on trips, and value a readable e-ink display with years of battery life. It is the better-reviewed product of the two and integrates with Home Assistant.