radon mitigation system 6

https://wiki-stock.win/index.php/What_Homeowners_Should_Know_About_Radon_in_York_Homes

A radon mitigation system pulls radon gas from beneath your home and vents it safely above the roofline using a fan and PVC piping. It's installed after testing shows high levels, and it can cut radon by over 90%—seriously reducing your long-term lung cancer risk.