Three radon detectors placed 5 inches from the floor
I live in a part of the USA where radon isn't supposed to be a big deal (Plano Texas). Ground floor apartment in a multi-unit apartment building. The building is about 25 years old.
I purchased 3 online radon detectors. All were initially placed 5 inches from the floor (I have now learned that this is too low).
The readings after the first 12 hours are as follows:
- AEG TEST HOUND 1011S was 7.67. Now placed on the bedside table for more readings.
- Chndaks RM-66 was 4.215. Now placed on a table in the kitchen.
- Metrinary was 6.755. Now placed on suitcase in bedroom.
Online, I've read that the first 12-hour reading isn't always accurate. Indeed, somesay wait 48 hours! Nonetheless, I'm starting to think there is a real problem here.
What has your experience been with readings after 24 hours? This is all quite surprising: I was naively expecting that the readings would be very low, given all I've read about how radon isn't common in Plano due to the kinds of rocks in the area!