Reduce indoor exposure levelsIndoor radon levels can be reduced by the installation of a sub-slab suction (depressurization) system, also known as an active soil depressurization system (ASD). A radon vent fan connected to the suction pipe(s) draws the radon gas from below the house and releases it into the outdoor air, while simultaneously creating a negative pressure (vacuum) beneath the slab. Sealing of openings to the soil can improve the operation and efficiency of the ASD system. Certified radon mitigation experts can be located by contacting your state health or environmental program. If the ASD does not reduce levels sufficiently, consider reversing the fan direction to pressurize the subslab, and then compare the results and use the more effective method. Measures to prevent high radon levels in new home construction are expected to be effective at reducing radon-related lung cancer deaths, but remediating old homes with high radon levels may be less effective.

If you smoke in your home, stopping will reduce the radiation dose from radon since smoke particles help increase the radiation dose.


Cover of Toxicological Profile for Radon
Toxicological Profile for Radon.
Keith S, Doyle JR, Harper C, et al.

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