Aranet4 HOME vs Aranet Radiation

The Aranet4 HOME wins overall, with a higher owner rating, a broader sensor set covering CO2, temperature, humidity and pressure, and more alerts. The Aranet Radiation only wins on price, and it is built to measure a completely different hazard, ionizing radiation rather than CO2.

What they measure. The Aranet4 HOME is a dedicated CO2 monitor that also tracks temperature, humidity and air pressure, useful for ventilation. The Aranet Radiation instead tracks ionizing radiation dose rate and total dose, and has no CO2, temperature, humidity or pressure sensing.

No, neither crosses over. The Aranet4 HOME has no radiation sensor, and the Aranet Radiation has no CO2, temperature, humidity or pressure sensor. Each is purpose-built for its own hazard, so you would need both to cover both.

Yes. Both connect over Bluetooth only, integrate with Home Assistant and no other smart-home platform, and share a similar e-ink display style, so the ownership experience feels familiar across the two despite the different sensors inside.

Choose it if CO2 and ventilation tracking are what you need. It pairs accurate NDIR CO2 sensing with temperature, humidity and pressure, plus a slightly higher owner rating than the Aranet Radiation.

Choose it only if background ionizing radiation, not CO2 or ventilation, is the hazard you want to monitor continuously. Its lower price is the one place it edges out the Aranet4 HOME on this comparison.