Airthings Corentium Home Portable Radon Detector Expired

For anyone that's interested in recent research regarding the standards and how they're derived.

There's no question that Radon increases the rate of lung cancer. There is, however, disagreement on what the normal acceptable level is and the model used to come up with that number.

I'm obviously not an expert so, if you're interested, I recommend you do your own research and form your own conclusions.

http://www.forensic-applications....radon.html
Very detailed and well sourced counter argument.


https://academic.oup.com/jrr/arti...49/4654992
Excerpt from the Conclusion:
"No statistical evidence could support the thesis that the linear model best fits the data over low radon concentrations. We have arrived at an opposite view, supported by several arguments, namely that the linear relationship has typically been pre-assumed in such analyses and that it should be discarded. The data are statistically too weak to accept any more complicated model than that of a constant ('zero effect') one. "

https://www.ncbi.nlm.nih.gov/pmc/...MC4679206/
Conclusion:
"The EPA action level for reducing radon in homes is 4 pCi/L (150 Bq/m3). This limit is 14 times lower than the NOAEL of 2100 Bq/m3 estimated in this article. The very low action level has been causing undue fear and unwarranted costs to many homeowners as well as a reduction in the market prices of their radon-stigmatized homes. It should also be noted that radon remediation significantly increases lung cancer mortality, as shown in Figure 3. To dispel the fear and eliminate this economic burden, the action level should be raised by a factor of at least 7 to about 1000 Bq/m3 (27 pCi/L), where the health benefit is near optimum."

https://www.ncbi.nlm.nih.gov/pmc/...MC3315166/
Excerpt from the Conclusion:
"Beware of association studies between lung cancer and radon because they do not prove causality! Finding an increase in lung cancer risk with increasing residential radon exposure for exposure levels just above the EPA's action level (approximately 150 Bq m−3) does not prove that the increased risk was caused by damage from alpha radiation from radon progeny. The increase appears to be due to a loss of radon ANP against smoking and other causes of lung cancer."

You are correct. If the $20 test says you have low radon, then you don't need this. If the $20 test says you have high radon, and you have it remediated, you don't need this.
If you enjoy watching your radon level go up and down, then this is essential,
I once found out my radon fan was broken by seeing my radon level spike. That didn't justify the $125 I paid for it, but it is nice to have.

I alway recommend to get something like Radon Eye RD200 which can log the data on your phone app. It is nice to have chronological data since the radon level can vary based on the season or weather. I see high increase in radon when the ground freezes in winter or there are snow storms.