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REENTRY OF RADON FROM MITIGATION SYSTEM OUTLETS
Citation:
Yuill, G. AND R. Coughlin. REENTRY OF RADON FROM MITIGATION SYSTEM OUTLETS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-94/129 (NTIS PB94190972), 1994.
Description:
The paper gives results of the measurement of reentry rates for radon released at roof level and at ground level near a house, to determine whether or not exhaust is necessary above the roof. (NOTE: Some radon mitigation systems draw air with a high radon concentration from under the basement floors of houses and exhaust it outdoors.) The measurement involved a portable mock-up of a radon mitigation system exhaust, with sulfur hexafluoride (SF6) as a tracer gas. he roof-level exhaust produced maximum indoor SF6 concentrations significantly lower than the ground-level exhaust. his suggests that the better radon discharge location in on the roof of the house.
