Examples of non-ionizing EM radiation include radio ( RF ) waves, extremely low frequency ( ELF ) fields, infrared ( IR ), visible light, and UV. These forms of EM energy are generally not dangerous, with some exceptions: high-energy radio microwaves and IR which can cause destructive heating of biological tissue; intense visible light which can cause blindness; and intense UV which can cause blindness and superficial skin burns in high doses over a short period of time, and skin cancer and cataracts of the eye at lower doses over long periods of time.
You and others can either listen to the engineers on this thread or take my advice above about Faraday suits and bedrock bunkers. If not within your budget, Reynolds still makes tin foil. Have nice day and remember to smell the flowers while they're still there. Photons are your friend.
But it needs to be said that there should be room for serious discussion and disagreement on this topic. FReepers of all people should know better than to be un-skeptical of much of the so-called "settled science" that is out there.
Not everyone who is concerned about the effects of exposure to wifi is deserving of tin-foil hat ridicule. There's good reason to be skeptical of proclamations that this kind of radiation is completely harmless, as some have done here.
And likewise, not every engineer who comments on a thread has enough data -or enough expertise (in fields such as public health, for example)- to make pronouncements of harmlessness with such certainty.