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Feb 20, 2020
11:50:19am
Bert609 All-American
Typically a fan system. It's why radon is a big deal on the ground floor, it disperses quite easily in free-air,
it's still coming up from the ground at ground level, but it's not concentrated.

Since it's a heavy element, it can concentrate in basements, especially if you have young kids near the floor. That's the danger.
Bert609
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Bert609
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