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

https://www.animenewsnetwork.com/bbs/phpBB2/profile.php?mode=viewprofile&u=1159706

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