radon reduction system 6

https://page-wiki.win/index.php/Your_Guide_to_Affordable_Radon_Mitigation_in_York_County

A radon reduction system, also known as soil depressurization, works by venting radon gas from beneath your home before it can enter your living spaces. A fan creates negative pressure under the concrete floor, drawing out the radioactive gas and exhausting it safely above the roof, significantly lowering indoor radon levels.