White-collar elites work in an environment with poor air quality for a long time, which can easily lead to dizziness, chest tightness, fatigue, emotional fluctuations and other uncomfortable symptoms, which greatly affects work efficiency and triggers various diseases, and in severe cases, it can also cause cancer, and the office environment has become an invisible health chronic killer. Now more and more white-collar workers and employees complain about the dirty air in the office, feeling breathless, and inattentive, resulting in a decline in work efficiency. If bosses want to improve employee productivity, it is important to carry out indoor air treatment like installing air purifier for large space projects. "The fourth category: respiratory disease patients in the polluted air for a long time, will cause respiratory function decline, respiratory symptoms aggravated, some will also lead to chronic bronchitis, bronchial asthma, emphysema and other diseases, lung cancer, nasopharyngeal cancer prevalence will also increase." Some common viruses and bacteria caused by diseases such as influenza, measles, tuberculosis and other respiratory infectious diseases will be spread indoors with the help of air. The fact that the SARS virus is raging also fully shows that indoor biological pollution cannot be taken lightly! The principle of indoor air purifier is based on the situation of indoor pollutants. "The fifth category: the elderly enter the old age, the body functions decline, more susceptible to environmental factors and induce various diseases. Air pollution is not only an important cause of respiratory diseases such as tracheitis, laryngitis and pneumonia in the elderly, but also induces high blood pressure, cardiovascular, cerebral hemorrhage and other diseases, and may also be life-threatening for the frail....