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Residential Radon Mitigations at Kitigan Zibi Anishinabeg: Comparison of Above Ground Level (RIM JOIST) and Above Roof Line Discharge of Radon Mitigation SUB-SLAB Depressurization Systems

Brossard, Mathieu*; Brascoupé, Marcel; Ottawa, Celine Brazeau; Falcomer, Renato§; Ottawa, William; Scott, Arthur**; Whyte, Jeff§

doi: 10.1097/HP.0b013e3182464d84
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Radon mitigations in nine houses were conducted by installing sub-slab depressurization systems (SSDS) with two types of discharge and fan locations: Ground level discharge with the fan located in the basement or roof-discharge with the fan located in the attic. This paper presents a detailed comparative analysis of the radon reduction efficiency, condensation problems, and the cost-effectiveness of both SSDS installation scenarios in nine houses. The mitigations from both SSDS scenarios were successful in reducing radon. The results of rim-joist installations discharging above ground level with the fans located in the basement show that a sealed radon fan with proper fittings and sealed piping were able to reduce the radon to acceptable levels in a cost-effective manner.

Real cases of radon mitigation results by sub-slab depressurization systems with sidewall discharge at above ground level.

*Environmental Health Program Health Canada–Quebec region, 1001, rue Saint-Laurent Ouest, Longueuil, (Qc), J4K 1C7; †Kitigan Zibi Anishinabeg Community Services; ‡Kitigan Zibi Anishinabeg Health & Social Services; §Radiation Protection Bureau, Health Canada; and**Arthur Scott and Associates.

©2012Health Physics Society