I am currently in the process of selling my home. A radon test revealed that my radon is at a level of 6.9 pCi/L. The buyers interested in my home are requesting that a mitigation system be installed.
I currently have a passive mitigation system. It consists of a pipe that starts below the basement floor, runs through an interior wall of the home, and vents above the roofline. My thoughts were that a fan could be installed in the basement on this existing pipe. (Installing the fan in the attic is not an option, as the home has vaulted ceilings and no suitable location for an attic fan.) I got an estimate from someone who stated that law and/or regulation now states that the fan cannot be installed in a basement. This means that I would need to reroute my existing pipe and have the fan installed on the exterior of the home. Is it true that law and/or regulation now prevents the fan from being installed in the basement on an existing passive system? (I live in the state of Pennsylvania, if that has any bearing on your response.)
Thanks in advance for any responses!