According to statistics, American companies directly pay up to 10.4 billion U.S. dollars a year for office fl. If you add operating losses and other expenses, it will be astronomical.
In 2020, due to COVID-19 (new Corona virus), the cruise liner Diamond Princess is not only at higher risk of contracting diseases, due to its crowded and semi-enclosed area, but also spreads rapidly. The ship was quarantined in Yokohama, Japan for approximately one month from February 4, 2020. Over 700 people were infected and 12 died. The loss is immeasurable.
Before 2010, the photocatalyst technology was limited to the use of ultraviolet light to trigger, so clean and safe products such as photocatalyst cannot be used in large quantities indoors due to the damage of ultraviolet light to the human body. After years of hard work and research, a photocatalyst that can be triggered by visible light has finally been developed. Technology, and was published in the Journal of the National Library of Medicine in 2010.
Central air conditioners provide comfortable temperatures, purify the air, maintain environmental safety, and are no longer a transmission channel for bacteria and viruses.