The latest research results show that the office will cause air pollution "pathogenic building syndrome" (BBS), symptoms include: headache, eye, nose and head discomfort, dry cough, dry skin, itching, dizziness, nausea, difficulty not concentrated, as well as sensitive to odors, etc., this will result in some cases inefficient employees work seriously even affect health. Indoor air pollution has been attributed to one of five categories of environmental factors endangering public health.

　　

　　Many domestic and foreign research results: a person's life, about 70% of the time to be spent indoors, the average daily inhalation of 12 cubic meters per person, while urban residents every day about 70% to 90% of the time in a variety of indoor environments through. You can imagine that indoor air testing for human health how important. A research shows that the U.S. Environmental Protection Agency, indoor air pollution levels are generally 2-5 times than outdoor serious, even grave exceptional cases up to 100 times. U.S. National Academy of Sciences estimates that U.S. health care costs each year due to indoor air pollution caused by about 150 to 100 billion U.S. dollars.

　　

　　In the test for each test items, there will be a different test conditions, such as: doors and windows closed one hour or more than 24 hours, have their specifications. Building on the use of central air conditioning, air conditioning operation should be under conditions of natural ventilation in buildings, tests may be needed outside the doors / windows closed immediately after 1 hour. Generally, the concentration of chlorine is detected, should the outer door / window off after 24 hours. Based preparations GB/T18883 (indoor air quality standards) standards testing, prior to sampling, the doors and windows must be closed for 12 hours during the windows and doors closed, do not allow smoking indoors, spraying air fresheners and other items with odors because smoking and scented items such as indoor pollutant concentrations may cause duplication and increase, therefore, resulting in increased test data, which will affect the accuracy of the data. 

　　

　　BANG Instrument Co., Ltd produces and sells: Formaldehyde climate chamber, VOC climate detection chamber.