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My new home came with a builder-installed passive radon system, is that good enough?
Frequently the answer to this question is no! In many cases, even a perfectly constructed radon system cannot reduce the radon level sufficiently (below 4 pCi/L ) due the amount of radon being produced in the soil around and under the home. The good news is that it is fairly simple to add a fan in the attic of the home to activate the system, and ensure that the radon levels are below 4 pCi/L, and that the piping is already in place, usually hidden in the walls and the attic.
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