I’ve only just heard of this but it strikes me as quite a strange superstition. Apparently, people die in Korea from fans!
Fan death, as in the fairly standard consumer air fan that most people are familiar with and can be purchased at Walmart for $31.88, is an urban legend in South Korea that blames the electric fan for suffocating, poisoning and freezing people if it is left running overnight in a closed room. Fans manufactured and sold in Korea have timers and warnings.
According to Wikipedia, The Korea Consumer Protection Board (KCPB) even warned against them and said they are a leading cause of seasonal deaths.
As you can tell by this shocking report, the phenomenon is mainstream news worthy!
- Beware of fans!
http://www.encyclopediadramatica.com/Fan_death (this one’s really funny)