"Radon Testing And Mitigation PNW is a locally owned and operated company with over a decade of experience in the industry. We are fully insured and all of our installers are certified through the National Radon Proficiency Program (NRPP). By using only top quality materials in the construction of your radon system we ensure the best possible results as well as a system that will stand the test of time. We have an industry leading 7 year guarantee that covers all warranty issues free of charge. This guarantee includes a levels guarantee which means if at any time your radon levels go above 4.0pCi/L after the initial installation, we will come right back to your house and fix it free of charge."