Photo Album: Radon Mitigation in Newell, IA We installed a one extraction point system with interior aesthetics, a muffler, and a sump cover. Attic Fan Fan in Attic Attic Fan Fan in Attic Extraction Point Extraction Point Extraction Point Extraction Point Sump Pit Sump Pit Sealed Related content "They did excellent all the way around." Read More - Lynn K. of Newell, IA « prev next »