Review on 🌬️ Airthings 2950 Wave Radon: Accurate Smart Radon Detector with Humidity & Temperature Sensor – No Lab Fees – Battery Operated - Free App by Jamal Murph

I bought 3 Airthings Gen2 units - to make sure they were all 'accurate' I installed them all in the same room - 2-4 inches apart . Your stated values are extremely "doubtful". Only the temperature is roughly the same and the humidity very similar, but the radon levels range from <0.3 to 8.2. * Refurb1 - new unit packaging damaged * Refurb2 - previously used like new - comes with original battery, original undamaged packaging etc. * Brand1 - brand new unit. UPDATE: 1 week later 2 REFURBs show the same values while a brand new unit shows no problems. I still don't know who I trust / who I don't trust. I'll let the test sit for a few more days (a week) and see if it changes/same, but I'm not impressed with the quality. UPDATE 2: Contacted Airthings support - I was told that "a brand new unit looks stuck and not showing any readings. You can remove and reinstall the batteries." A brand new defective or unreliable device? How much can I trust after that? 24 hours later and the values haven't changed. Still showing <0.3.