long-term radon test 2

https://mycontinuousradonmonitornotes.currentvale.com/posts/why-a-continuous-radon-monitor-gives-you-the-full-picture-on-indoor-air-quality

A long-term radon test sits in your basement for months, quietly measuring the radioactive gas that seeps from the soil. Unlike quick tests, it catches seasonal shifts and daily fluctuations, giving you a true picture of your home's exposure before you decide on expensive mitigation.