A well-installed radon system lowers indoor radon by venting gas from beneath the slab or crawlspace

https://www.scribd.com/document/1008202217/Radon-Mitigation-Near-Me-Mobile-Homes-and-Special-Considerations-176666

A well-installed radon system lowers indoor radon by venting gas from beneath the slab or crawlspace, using continuous fans and airtight sealing techniques.