Why did the ancients use charcoal hot pot to keep warm without carbon monoxide poisoning?

Speaking of carbon monoxide, it's actually quite scary. Its high concentration can directly lead to human death. In fact, there are many reasons for carbon monoxide. Take the ancients for example. In fact, if they use charcoal fire to keep warm, they will also be poisoned by carbon monoxide. But why hasn't this happened in history? Let's follow me to reveal the secret and analyze it!

Mainly because you haven't seen it.

Qin Guan is poisoned by carbon monoxide.

Carbon monoxide poisoning had a special term in ancient times, called "carbon poison" or "coal poison".

Qin Guan was poisoned by charcoal and almost died. Charcoal poison is better, and then I got malaria. As soon as malaria was cured, I had nightmares about many children. Qin Guan was not directly poisoned at that time, mainly because the room he stayed in was breathable, which was a lucky escape. If blocked, Qin Guan will inevitably die young, which is the phrase "if two feelings last for a long time, they will be there sooner or later."

You might say that this is a special case, it is not poisoned. Let's talk about another person, Feng Tingyue, a native of Shunzhi for six years (1649), a Jinshi, a native of Dezhou, Shandong Province, who is an official and upright. After he got off work from the imperial court, there was no nightlife. He just goes home to eat, read and sleep. In the early morning of September 16th, the year of Chen Geng in Kangxi (1700), he died of coal poisoning. Feng Tingyue is a big official in the imperial court, and he is not a nobody. If the official's house is sealed and the people are well ventilated, the people will not be poisoned by carbon monoxide, which is a drag.

Historical data will not record that an ordinary person died of charcoal poisoning, but you can ask the older generation. When heating with charcoal fire and briquettes, one or two people are poisoned every year. The ancients recognized that carbon monoxide poisoning: "This syndrome was caused by lying on the kang or excessive fire, and the air was blocked, resulting in suffocation and death, and the body was extremely soft", and "the preventive method is to store a basin of clear water indoors to make the windows breathe, which can solve coal poisoning".

Li, a publisher of the Republic of China, recorded in The Journey to the West that he lived in a guest house, which gave him a central basin (charcoal basin), and the room was as warm as spring. The next day, I had a splitting headache and charcoal poisoning. I blew it outside and gradually got better. Therefore, the ancients used charcoal fire to keep warm and did not pay attention to ventilation. Carbon monoxide poisoning is very common. Modern people use charcoal fire to keep warm, stop to keep warm and pay no attention to ventilation. Carbon monoxide poisoning is also common. What are the exceptions?

So I answered, "Why did the ancients use charcoal hot pot for heating, but there was no carbon monoxide poisoning?" Ask if it is, and then ask why.