GB/T17094-1997 Indoor Carbon Dioxide Hygienic Standard
Carbon dioxide (CO2) is an air pollutant that is commonly found indoors. The concentration of CO2 indoors can affect the comfort and health of occupants. The indoor CO2 hygienic standard, GB/T17094-1997, was issued by the China Ministry of Public Health and is designed to help ensure that the indoor CO2 concentration is kept below a certain level.
The standard provides guidance on the allowable maximum CO2 concentration indoors. Specifically, the standard states that in order to meet the hygienic requirement, the maximum allowable CO2 concentration in an indoor environment should not exceed 1000ppm (0.1%). This applies for any general indoor space with an occupant density less than or equal to 1 person per 10 m3. For rooms that have an occupant density above 1 person per 10 m3, the CO2 concentration should not exceed 1500ppm.
The standard also specifies the methods of CO2 measurement, as well as the responsibilities of the building owners and occupants. The building owners are responsible for ensuring that the CO2 concentration indoors is kept at or below the prescribed limit. They are expected to install the necessary equipment for measuring CO2 concentrations and regularly inspect the air-conditioning system to ensure adequate air circulation. The occupants, on the other hand, should take measures to reduce CO2 in the indoor air such as turning on exhaust fans when using certain appliances, or avoiding overly crowded indoor spaces.
The indoor CO2 hygiene standard is intended to ensure that the indoor air is kept at a safe and comfortable level. By adhering to the standard, building owners can help ensure the health and safety of their occupants, while occupants can ensure they are living in a healthy environment.
