alt Hacker News> If your friend experiences noticeable degradation regardless of the distance within the room, it might be worrisome.
Probably not. I recall calculating it once, and the legal requirements for microwave oven shielding still allow it to produce a few watts of 2.4Ghz leakage. This is contrasted to 50mW typical WiFi AP power, and 5-50mW BlueTooth powers.
A few watts is totally non-dangerous to humans, especially diffused across the entire door.
An old Unifi disc AP will do 100mw or 20dbm out of the box, a few cheap Cudy APs I have do about 400mw or about 26dbm.
On 2.4 GHz in the US you're allowed up to 36dbm, 30 of that can be transmitter, the remaining 6 can be a higher gain antenna.