Is it harmful to have too high or too low humidity? What level is appropriate?

According to China's indoor air standards, indoor humidity should be 40%~80% in summer and 30%~60% in winter. The suitable indoor humidity for the elderly and children is 45%~50%, and for patients with respiratory diseases such as asthma is 40%~50%.

When the indoor air humidity is lower than 40%, dust, bacteria, etc. It is easy to attach to mucosa, irritate throat, cause cough, and easily induce respiratory diseases such as bronchitis and asthma. Influenza virus can reproduce faster in dry environment, and it can also cause allergic dermatitis, skin itching and other symptoms.

An environment with excessive humidity is also not conducive to human health. People may feel nausea, loss of appetite, irritability, fatigue, dizziness and so on. And it is easy to get rheumatoid arthritis after a long time. In high humidity environment, mold is more likely to breed and threaten human health.

Extended data

In summer, the humidity in most parts of China is relatively high, so a hygrometer can be placed indoors to observe the humidity at any time. The air humidity in the south is high, which can turn on the dehumidification function of air conditioning; The outdoor humidity is high in rainy days, so the window opening time should be reduced; When the weather is fine, open more windows to ventilate and disperse dampness; Put some moisture absorption boxes or desiccant in the wardrobe and cupboard; There are fewer fish and plants in the bedroom.

People's Network-Room humidity is 40%, and I don't like getting sick (home hygiene).