Rumor identification: Central air conditioning has the possibility of spreading new coronavirus. Rumor analysis: 1. New coronaviruses are mainly spread through droplets, and the range of droplet activity increases significantly when central air conditioning is in working condition. During the outbreak, use should be stopped and the central air conditioning system and the entire environment should be disinfected. After the complete cessation of the epidemic, after assessing the qualified, according to the actual situation to see whether to open the central air conditioning again. 2. Routine cleaning and disinfection of air conditioning ventilation systems should meet the requirements of the “Specification for Cleaning and Disinfection of Centralized Air Conditioning Ventilation Systems in Public Places”. You can use 250mg/L-500mg/L chlorine or chlorine dioxide disinfectant solution to spray or wipe the central air conditioner for a duration of 10-30 minutes. For metal parts that need to be disinfected, it is recommended that quaternary ammonium disinfectants be preferred for cleaning. Special Note: For shopping malls, office buildings and other leisure and office places with high crowd flow, indoor ventilation and air circulation should be ensured, regardless of whether the central air conditioner is running or not. After work every night, the fresh air and exhaust system should be allowed to continue to run for about 1 hour to ensure that the air is fresh.