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.
A customer sent in pictures of their successful radon mitigation. He really took the time to design a system that would not only be effective but would
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