Living in a place with poor air circulation for a long time will stimulate the respiratory system because of poor air circulation and the accumulation of toxic substances in the air. If the air is not circulating, staying indoors for a long time will cause dizziness, sweating, dry mouth, chest tightness and vomiting.

Especially when the temperature is relatively high, because the air humidity is relatively high, bacteria and viruses are also easy to breed, thus floating in the air, the indoor air is not circulated, and the body's resistance will be relatively reduced.

Bacteria are easy to gather in places where the air is not circulating.

When you sweat in the gym, the smell on your clothes reminds you that bacteria are growing.

2. The solubility of air carbon dioxide is very high.

Poor air circulation can easily lead to carbon dioxide accumulation. When the concentration of carbon dioxide in the air exceeds 8%, people will feel tired, short of breath, asthma and other discomfort.