I bought my mitigation fan and all my needed accessories from Val, cost was a little over $250. I did the install following Val's web site, my radon level dropped from 13 pCi/L to below 1 pCi/L. I recommend following his advice and doing it your self if you are fairly good at do it your self projects. I want to give Val a huge thank you.
Great site, full of lots of great info! Thanks again, Pat