Aranet4 HOME vs Eve Room

The Eve Room wins overall in this comparison, thanks to a lower price, broader connectivity (Bluetooth and Thread) and wider integrations (Apple HomeKit, Home Assistant and Matter). The Aranet4 HOME is the better pure sensor, with a higher owner rating, accurate NDIR CO2 monitoring and up to 4 years of battery life, but it is Bluetooth-only and works with Home Assistant alone.

What they measure and how they connect. The Aranet4 HOME is a dedicated CO2 monitor (also temperature, humidity and atmospheric pressure) that talks to Home Assistant over Bluetooth, while the Eve Room measures VOCs, temperature and humidity and plugs into Apple HomeKit, Home Assistant and Matter over Bluetooth and Thread.

The Aranet4 HOME, by a wide margin. It runs up to 4 years on two AA batteries, while the Eve Room lasts roughly 6 weeks per rechargeable charge before needing to be topped up.

No. The Aranet4 HOME focuses on CO2 (plus temperature, humidity and pressure) and does not read VOCs, while the Eve Room measures VOCs (plus temperature and humidity) and does not read CO2. Only temperature and humidity overlap.

Anyone who wants accurate, portable CO2 and ventilation monitoring with years-long battery life. The Aranet4 HOME uses a reference-grade NDIR CO2 sensor, an always-on e-ink display and up to 4 years on AA cells, and integrates with Home Assistant, though it has no Wi-Fi.

Apple-centric smart-home users who want VOC, temperature and humidity readings that slot into HomeKit, Home Assistant and Matter over Thread. The Eve Room is the more affordable, better-connected option, though its VOC sensor can be inconsistent.