DB31/T 405-2021 Active

This document stipulates the general hygiene requirements for centralized air conditioning and ventilation systems, including design hygiene requirements, operation and management requirements, hygiene indicators and limit values, hygiene inspection technical requirements, and cleaning and disinfection technical requirements.
This document is applicable to the hygiene management of centralized air conditioning and ventilation systems in the following buildings:
——Commercial buildings such as hotels, catering buildings, shopping malls, public baths, public utilities, and financial institutions' business premises;
——Office buildings such as administrative buildings and commercial office buildings;
——Cultural and sports entertainment buildings such as exhibition halls, museums, libraries, art galleries, memorial halls, science and technology museums, archives, gymnasiums, swimming pools, concert halls, cinemas, amusement arcades, dance halls, and Internet cafes;
——Transportation buildings such as airports, railway passenger stations, long-distance passenger stations, rail transit stations, and port passenger stations;
——Education and health buildings such as schools and medical institutions;
——Residential buildings;
——Other public buildings used for social public activities.