Radon can not be seen, scented, really felt, or otherwise spotted, other than with an examination. That's why, according to the EPA, the only way to understand without a doubt if you have a radon trouble is to test.

Does opening windows reduce radon?

Opening windows improves air circulation and ventilation, helping move radon out of the house and https://radon1.com/what-are-the-symptoms-of-radon-poisoning/ mixing radon-free outside air with indoor air. Opening basement windows helps reduce negative air pressure, diluting radon with clean outdoor air.