The fan death myth is an urban legend and cultural superstition prevalent primarily in South Korea, claiming that leaving an electric fan running overnight in a closed room with windows shut can cause human death by asphyxiation, hypothermia, or poisoning. Proponents of the myth historically argued that fans consume oxygen, chop air molecules, or cause toxic cooling. From a scientific and engineering standpoint, this belief is entirely false because a standard electric fan simply circulates existing room air without altering oxygen levels or causing fatal body temperature drops. You can troubleshoot safety concerns easily by reviewing scientific literature on air circulation. You can verify that your understanding is correct when realizing that running a fan in a closed bedroom poses zero risk of suffocation, allowing you to sleep comfortably with proper ventilation.
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