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Brossard M.,Environmental Health Program Health | Ottawa C.B.,Kitigan Zibi Anishinabeg Health and Social Services | Falcomer R.,Radiation Health Assessment Division | Whyte J.,Radiation Health Assessment Division
Health Physics | Year: 2015

Available radon mitigation results were gathered for 85 houses mainly by installing sub-slab depressurization systems (SSDS) with two types of discharge and fan locations: Above ground level discharge with the fan located in the basement (AGL) or above roof line discharge with the fan located in the attic (ARL). A comparative analysis was made of mitigation efficiency and of exhaust icing. Results show that both SSDS scenarios reduced radon levels similarly. The results of SSDS with AGL show that a sealed radon fan having proper fittings and sealed piping was able to reduce the radon to acceptable levels, and that these installations were less subject to obstructive icing of the exhaust in cold climates. © 2014 Health Physics Society.

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