radon retest after mitigation 5

https://fair-wiki.win/index.php/Why_Every_St._Louis_Home_Needs_a_Radon_Gas_Test

After you've installed a radon mitigation system, it's crucial to retest your home. That's not just a suggestion; it's the only way to confirm the fix actually worked. Usually, you wait at least 24 hours after the system starts running, then place a test kit in the lowest lived-in level. Getting that post-mitigation number gives you real peace of mind, knowing your family's exposure is genuinely lower and your investment wasn't wasted.