New Construction Radon Ready: Pre-plumbed passive systems can be activated by a contractor with the right fan
https://www.mediafire.com/file/1vysr98kz707pp1/pdf-15894-96768.pdf/file
New Construction Radon Ready: Pre-plumbed passive systems can be activated by a contractor with the right fan, delivering code-compliant radon reduction from day one in your new home.