How is radon removed from homes?
The primary method of radon reduction (or mitigation) involves the installation of an Active Soil Depressurization (ASD) system. An ASD system involves the installation of a venting system that removes radon gas from the soil beneath a house’s foundation. The system includes a 3- to 4-inch PVC vent pipe, a continuously running suction fan and a system indicator. The PVC vent pipe is installed through the foundation into a small pit that is dug out by hand through the insertion hole (which often has to be drilled out). The pipe is then routed either up through the house and exited through the attic and the roof or routed to the exterior of the house and up the wall with the terminus above the eave line of the house. If the vent pipe is routed through the house, the suction fan is usually installed in the attic. If the vent pipe is routed up the outside of the house, the fan is mounted near ground level. The system indicator is mounted at some visible location below the suction fan. Most
