Handbook, Assessment Protocols. Durability of Performance of a Home Radon Reduction System. Sub-Slab Depressurization Systems

摘要

The purpose of these protocols is to provide a methodology to test subslab depressurization (SSD) radon mitigation systems in-situ to determine the long-term performance of these systems. Durability of SSD radon mitigation systems in the context of the report compares the performance of the mitigation system immediately after installation to operating conditions at later time intervals of months or years. The methodology includes occupant interviews and various parametric measurements with which the performance of the mitigation system can be evaluated. The major basis of comparison is the radon levels in the building. Other post-installation data, such as system flow rates or pressures, will be used in the assessment of durability of performance. Results of the testing during the development of these protocols point out two important findings: first that occupant interaction with the mitigation system can result in elevated radon levels; and second that most of the SSD mitigation systems are operating as designed 3.5 years after installation.