We are listed with the National Environmental Health Association (NEHA-NRPP) and The National Radon Safety Board (NRSB). We have also helped teach the Radon Mitigation School hosted by Auburn University for new Radon Mitigation Contractors. We guarantee to bring your radon results below EPA standards of 4.0 pCi/L. We also standby our work with a twelve month warranty. All our fans have a 5 year warranty through the manufacturer. We are approved by the National Environmental Health Association (NEHA-NRPP) to perform both short-term and long-term radon testing. All testing and radon mitigation systems are done in accordance with EPA Protocols.