The basement pCi/L was 12.8. After installing a vent in the sump pump pit along with a RP140 fan, the basement pCi/L is now 0.5. Thanks to Val Riedman for the good advice.
I ordered a complete DIY Radon Mitigation system from you back in April 2014. Just wanted to say thank you for ALL the superior customer support and service
I own a 1966 ranch house in Northern Iowa. Finally decided it was time to wrap my arms around the health hazard of Radon. Did a First Alert test to see