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Title: Good peace of mind
Review: I bought this as a supplement to the radon mitigation system in my new home. It's a good indicator of the levels in your home. Based on my research nobody really has a definitive cause/effect for changing levels of radon in a home. Secondly I don't have a professional understanding of all things hvac, ventilation and construction related. Therefore, I wouldn't use this device as the actual radon reading; but more of a guide as to whether further action is needed. The owners manual states the device needs to be re-calibrated annualy at a cost of $75+postage. Depending on the radon levels found in your home (mine was 8.9) this cost may be well worth it to stay in the know.
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