Radon Reduction System Echo

When I bought my first house in St. Louis, I was more worried about the furnace and the roof than what was lurking in the basement. A friend who worked in environmental health suggested I test for radon, and I brushed it off. That was until my test kit came back with a reading above four picocuries per liter, the level where the EPA recommends action. That number changed how I thought about indoor air quality. It also led me to understand why a properly designed radon reduct