SunRADON lüft

SunRADON describes the lüft's radon sensor as solid-state technology that needs no maintenance and does not degrade over time, and says the lüft uses the same radon detection and monitoring technology as its professional radon monitors. Its specification sheet lists the radon sensor as an absolute sensor with a range of 0 to 9999 pCi/L, a resolution of 0.1 pCi/L and an uncertainty of 10% over 7 days at 4 pCi/L. The lüft's own documents do not name the detector beyond solid-state or say how air reaches it, so the sampling method is not stated by the maker.

Once plugged in, the lüft runs a self-test. SunRADON's setup guide says the air-quality readings (eCO2, tVOC, temperature, pressure and humidity) are available after 30 minutes, and the first radon reading after 90 minutes, when all six sensors start reporting hourly. The monitor calibrates itself over its first three hours and keeps optimizing over the next 7 days, and until it stabilizes the front light may show yellow or red. In the app, updated readings are available every six minutes.

SunRADON's documents do not say what period the hourly radon figure averages. C-NRPP's table describes long-term and short-term averages in the app and a color-coded indication of levels on the monitor. The authors of a 2026 study in Sensors, who ran lüft monitors in a school in Utah, describe the readings as logged every hour as an average of the last 24 hours, with the data retrievable remotely through the OneRadon mobile app or cloud dashboard. SunRADON's 2020 setup guide calls its app the Lüft app.

There is no number on the device. The front LED shows green when everything is in good condition, yellow when at least one of the six sensors has reached its warning threshold, red when one has reached its alert threshold, and blue when the nightlight is on. The thresholds, colors, brightness and nightlight times can be changed in the app for each unit. The iOS and Android apps give a dashboard, trend charts and downloadable data and send alerts when levels pass your limits; SunRADON says the data is stored in the cloud, with reports sent to your email if you want them.

The other five sensors are listed on the specification sheet: relative humidity (10 to 95%), temperature (40 to 105°F) and air pressure (80 to 110 kPa) as absolute readings, and total VOCs (0 to 1187 ppb) and equivalent carbon dioxide (eCO2, 400 to 8192 ppm) as relative readings. SunRADON explains that the VOC and eCO2 sensor detects changes rather than absolute levels and self-levels over time, and that eCO2 is derived from the mixed gases rather than read by a carbon dioxide sensor. The app also shows a mold risk indicator, calculated from humidity and temperature on a five-level scale, an overall indoor air quality status, and the outdoor Air Quality Index.

For connections, the specification sheet lists Bluetooth v4.2 BR/EDR and Bluetooth Low Energy, and 2.4 GHz Wi-Fi. After a power cut, SunRADON says the lüft resumes on its own, reconnects to Wi-Fi and keeps its settings and data on the device for up to 4 years; the first hourly reading after the outage can be up to 90 minutes late, though readings on demand are available before then.