Indoor air quality standards for indoor air detectors

Why Air Testing? The reason is that indoor environmental pollution has become one of the killers that seriously affects human health.

The importance of indoor air quality We spend more than 70% of our time in the indoor environment. Good indoor air quality is the most important factor to ensure good health, substandard indoor air can lead to physical discomfort and poor health (such as headache, chest tightness, drowsiness, allergies, eye strain, frequent colds, etc.). Pregnant women, children, the elderly, office workers, and people with respiratory and cardiovascular diseases are more susceptible to poor indoor air quality.

Common Indoor Air Pollutants 1Contamination of building materials. The gypsum board used in modern building decoration breeds bacteria, viruses and other microorganisms; 2.

Pollution caused by enclosed buildings. The fully enclosed building isolates the flow of natural fresh air....

Code for Indoor Environmental Pollution Control of Civil Construction Projects (GB50325-2010) promulgated by the Ministry of Construction for doors and windows closed for 1 hour, testing standard M3).

Class I and Class II buildings are only available in the national standard GB50325-2010.

Categories include residences, hospitals, senior buildings, kindergartens, learning classrooms, etc.;

Buildings include offices, shops, hotels, cultural and entertainment venues, libraries, stadiums, public places, etc.

At the same time, there is also the "Indoor Air Quality Standard" (GB T18883-2002), which is promulgated by the Ministry of Health.

Close the doors and windows for 12 hours, and the detection standard is mg m3).

Both standards can be used to detect indoor formaldehyde levels, but which is more suitable for the general public and more accessible to the people?

GB T18883-2002, doors and windows need to be closed for 12 hours. Taking into account the fact that the testing conditions are as close as possible to the daily life hall conditions, that is, the occupants usually have two opportunities to open the windows in one day. One hour after closing the doors and windows, the GB50325-2010 test was carried out (which contained six items: formaldehyde, benzene, toluene, xylene, ammonia and TVOC).

Obviously, the 50325 standard is more concerned with how easy it is for builders and renovators to pass this standard. The indoor environment is not too polluted, and the results are often found to be 12 hours and 1 hour early compared to the actual house species. That is, according to the standard of GB T18883-2002, the GB50325-2010 standard may not meet the standard, nor does it meet the minimum living environment standard for healthy people.

2.It is clear that there is a big difference between 18883 and 50325. 18883 focuses on the health of the people, and 50325 pays more attention to the interests of builders and decorators.

Indoor air quality tests based on the 18883 standard are the basic standard for measuring the environmental protection of houses. There are 46 50325 inspection units certified by the Beijing Bureau of Quality and Technical Supervision, and only 12 are 18883. 46:

12 The objective facts are undoubtedly a background factor in the confusion and misleading meaning of a large amount of information.

At present, (March 2019), there are two main indoor air testing standards, namely: GB T18883-2002 "Indoor Air Quality Standard" and "Code for the Control of Indoor Environmental Pollution Section Grip Hole Contamination in Civil Construction Engineering" GB50325-2010

Indoor air quality standards should be used to measure indoor air quality in accordance with the "Indoor Air Quality Standard" GB T18883-2002 (before the furniture is in place or after a period of occupancy).

Formaldehyde: benzene: toluene: xylene:

Ammonia: tvoc:

<> indoor ambient air quality refers to the indoor environmental quality that people are exposed to in the environment where they live, work, and study. For the monitoring of indoor ambient air quality, professional technical specifications need to be followed, and the following is an analysis of the technical specifications for indoor ambient air quality monitoring

1. Monitoring object:

Indoor ambient air quality monitoring objects include: air purifiers, formaldehyde, TVOCs, temperature, humidity and other factors.

2. Measuring equipment:

Monitoring equipment with accurate stability, precision and ultra-sensitivity should be selected, and the accuracy and precision of the equipment should meet national and industry standards. Factors such as air flow, air reference temperature, and relative humidity of the air also require calibration and proper installation of the equipment.

3. Monitoring methods:

The monitoring method should be scientific and reasonable, such as the level of suspended particles in the air can refer to GB T18883-2002, and the CO level can refer to GB Z2028-2006. The monitoring process should be automated to improve the accuracy and efficiency of monitoring, and the monitoring data should be stored in time to facilitate the traceability and analysis of the source data.

4. Monitoring frequency:

The frequency of monitoring should be based on the actual environmental needs. For outdoor-indoor and outdoor contaminant subsystems, monitoring should be carried out at least once a month; For perennial residences and consumption places, quarterly, bimonthly or monthly monitoring should be carried out, and monitoring should be strengthened in places involving people with high indoor air quality sensitivity.

5. Report and evaluation:

After the monitoring of indoor air quality is completed, reports and evaluations should be prepared, and suggestions and improvements should be made to promote the sustainable development of environmental monitoring.

In summary, the technical specifications for indoor ambient air quality monitoring have important guiding significance. Indoor air quality monitoring can be carried out more accurately and scientifically by following the norms, so as to effectively maintain the health and comfort of the indoor environment, and ensure the health of people's livelihood and the safe operation of production.