The national standard "civil construction engineering indoor environmental pollution control standards" issued

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The Ministry of Housing and Urban-Rural Development issued the national standard GB 50325-2020 "Civil Building Engineering Indoor Environmental Pollution Control Standards"

The Ministry of Housing and Urban-Rural Development has issued the national standard GB 50325-2020 "Indoor Environmental Pollution Control Standards for Civil Building Projects", of which Articles 3.1.1, 3.1.2, 3.6.1, 4.1.1, 4.2.4, 4.2.5, 4.2.6, 4.3.1, 4.3.6, 5.2.1, 5.2.3, 5.2.5, 5.2.6, 5.3.3, 5.3.6, 6.0.4, 6.0.14 and 6.0.23 are mandatory and must be strictly implemented. The original "Code for Indoor Environmental Pollution Control of Civil Building Engineering" (GB50325-2010) shall be abolished at the same time, and this standard shall be implemented as of August 1, 2020.
Main technical contents of this standard revision:
1. Toluene and xylene are added to pollutants in indoor air;
2. The classification of decoration materials is refined, and the limit and determination method of pollutant content (release amount) of some materials are adjusted;
3. The environmental test chamber method and dryer method for determination of formaldehyde release from artificial wood board are reserved;
4. Put forward the requirements of pollution control pre-assessment and specific requirements of material selection for interior decoration design;
5. Put forward specific requirements for the minimum ventilation frequency of Class I civil buildings with natural ventilation;
6. Improve the comprehensive radon prevention measures of buildings;
7. Put forward stricter pollution control requirements for the decoration and decoration of kindergartens, school classrooms, student dormitories, etc.;
8. Clarify the detection method of indoor air radon concentration;
9. Re-determine the limit value of indoor air pollutant concentration;
10. The T-C composite adsorption tube sampling and detection method for benzene series and volatile organic compounds (TVOC) has been added to further improve and refine the sampling and measurement requirements for indoor air pollutants.