In general, the likelihood of new coronavirus infection caused by turning on the air conditioner is relatively low. Infection with the New Coronavirus requires the fulfillment of three conditions: the source of infection, the means of transmission, and the susceptible population to cause infection. Coronavirus is mainly transmitted through droplets, theoretically, in the case of a very large number of cases of Coronavirus pneumonia, resulting in high levels of Coronavirus in the air, can be circulated through the air conditioning, increasing the chances of infection. However, this is still rare in daily life. It is recommended to avoid prolonged operation of air conditioners during the epidemic period of the new coronavirus, and to open windows or increase the number of fresh air systems to keep the air clean and reduce the risk of infection, as well as to clean the air conditioners regularly and to wear a good mask when necessary. [Tip] This article refers to “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.