post-mitigation radon testing 4

https://wiki-global.win/index.php/Why_You_Need_a_York_County_Radon_Expert_for_Your_Home

Once the radon mitigation system is installed, post-mitigation radon testing is crucial to confirm it's actually working. You wait at least 24 hours, seal all windows and doors, then run the test. If levels still exceed 4 picocuries per liter, you might need to adjust the system or try a different approach. It's the only way to know for sure your home is safe.