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Abstract
Field tests were performed on an innovative radon mitigation system that provides basement pressurization and dilution while conserving heating fuel, improving indoor air quality and human comfort. This year-round radon reduction retrofit device has been successfully installed and monitored in a Wisconsin home that exhibited elevated radon levels. In the design, a secondary heat exchanger for a conventional-type residential furnace is modified to provide heated fresh air exchange and intermittent pressure regulation. Experiments have shown that the average indoor radon level can be reduced by 97 percent and that employment of this system during the heating months exhibits a zero operational cost. Measurements of radon reduction levels, fuel usage and environmental factors that affect radon migration are documented. A state-of-the-art PC-data acquisition system with accompanying instrumentation for radon measurements is also described.