post-mitigation radon testing 5

https://wiki-canyon.win/index.php/Why_Radon_Water_Testing_Matters_for_Private_Well_Owners_in_Pennsylvania

After installing a radon mitigation system, it's crucial to conduct post-mitigation radon testing to confirm the system is working properly. Typically, you'll place a test device in the lowest lived-in level for at least 48 hours, following the same protocol as the initial test. This ensures radon levels have dropped below the recommended action limit of 4 pCi/L, giving you peace of mind that the air in your home is safe and the investment has paid off.