Terrestream vs Aranet4 HOME

Manufacturer page checked September 12, 2026. Aranet help describes Aranet4 HOME as measuring CO₂, temperature, humidity, and ambient pressure in real time.

Where Aranet4 fits. Aranet4 is strong when the job is portable CO₂ awareness: bedrooms, meetings, travel, and quick ventilation checks.

Where Terrestream differs. Terrestream is not trying to be pocketable. It is a room device with particulates, VOC, NO_x, comfort, pressure, light, app/intelligence history, and interpretation.

Factual distinction. Aranet4 is a portable CO₂ monitor. Terrestream is a stationary room monitor built to connect smoke, cooking, cleaning, ventilation, and comfort patterns.