This one, in fact...
...from Dr. Yeon Dong-su, dean of Kwandong University's medical school in South Korea, commenting on how electric fans don't smother you to death, they induce hypothermia:
"Many people say that these victims die from lack of oxygen, but that is not true. Hypothermia does not only occur in the winter when it is cold. The symptoms can also take place if a person has been drinking and turns on a fan in a closed room. Most people wake up when they feel cold, but if you are drunk you will not wake up, even if your body temperature drops below 35 degrees Celsius, at which point you can die from hypothermia. It doesn't matter so much about the temperature of the room. If it is completely sealed, then in the current of an electric fan, the temperature can drop low enough to cause a person to die of hypothermia."
Why, even newspapers will quote medical experts... medical experts that you should believe... on topics you should never question. A typical example like this excerpt from the July 28, 1997, edition of the Korea Herald, an English-language newspaper:
The heat wave which has encompassed Korea for about a week, has generated various heat-related accidents and deaths. At least 10 people died from the effects of electric fans which can remove oxygen from the air and lower body temperatures...
On Friday in eastern Seoul, a 16-year-old girl died from suffocation after she fell asleep in her room with an electric fan in motion. The death toll from fan-related incidents reached 10 during the past week. Medical experts say that this type of death occurs when one is exposed to electric fan breezes for long hours in a sealed area. "Excessive exposure to such a condition lowers one's temperature and hampers blood circulation. And it eventually leads to the paralysis of heart and lungs," says a medical expert.
"To prevent such an accident, one should keep the windows open and not expose oneself directly to fan air," he advised.
The point is that one should never simply someone's word for truth, specially a total stranger. Just because someone is a doctor does not make them infallible, corrupt, or a liar.
And on another note, there is no mention in your source stating that people die from breath 'peanut' air.
When my first son was born the pediatrician in the hospital was an Indian woman who said that I was not to kiss my baby’s face. I thought there was a reason or a certain amount of time, but that was just what she believed.