New Methods of Energy Efficient Radon Mitigation

TitleNew Methods of Energy Efficient Radon Mitigation
Publication TypeJournal Article
Year of Publication1995
AuthorsWilliam J Fisk, Richard J Prill, John D Wooley, William J Fisk, Yves C Bonnefous, Ashok J Gadgil, William J Riley
JournalHealth Physics
Date Published05/1995

Two new radon mitigation techniques are introduced and their evaluation in a field study complemented by numerical model predictions is described. Based on numerical predictions, installation of a sub gravel membrane at the study site resulted in a factor of 2 reduction in indoor radon concentrations. Experimental data indicated that installation of "short-circuit" pipes extending between the subslab gravel and outdoors caused an additional factor of 2 decrease in the radon concentration. Consequently, the combination of these two passive radon mitigation features, called the membrane and short-circuit (MASC) technique, was associated with a factor of 4 reduction in indoor radon concentration. The energy-efficient active radon mitigation method, called efficient active subslab pressurization (EASP), required only 20% of the fan energy of conventional active subslab depressurization and reduced the indoor radon concentration by approximately a factor of 15, including the numerically-predicted impact of the sub-gravel membrane.

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