our neighbor across the street had high radon readings so i bought the airthings monitor with the thought - i could wait 3 months for a proper test or know in about a week if it was high enough to be worried - came back above 600. the house was new so we were roughed in for radon- although the builder could have had some more forethought about where they put the pipe. at the time our neighbors got a $2k quote ( even when roughed in) and we didn't have the cash so i did it myself for about $500. Monitor is now below 50 at all times fan has been running good for 2 1/2 years. our neighbors right next door was under 150 - so it varies widely between houses
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