Does it mean that the longer the door and window are closed, the better? For example, closing for 48 hours is actually unscientific. Formaldehyde release is a slow process with cumulative effect. The longer the time of closing, the higher the formaldehyde content in the air will be, and the detected data will have no reference significance.
At present, there are some non-standard and bad companies in the market. They use the GB / T18883 standard for testing. However, if the customers close the doors and windows for 24 hours or even 48 hours, the probability of exceeding the standard of the measured data will be greatly increased. This is a wrong practice, the purpose is definitely to let consumers do formaldehyde removal, so as to make more profits.
In 2001 and 2002, the relevant national regulations and standards have been issued for the detection of closed doors and windows. They are GB 50325-2001 code for indoor environmental pollution control of civil building engineering and GB / t18883-2002 national indoor air quality standard. In the two standards, the former stipulates that the time for closing doors and windows is 1 hour, while the latter is 12 hours.
Fuzhou in addition to formaldehyde company testing technology recommendations: the time to close doors and windows should not be too short, or controlled at about 12 hours, but also not too long, should not exceed 18 hours, otherwise the measured data again with the GB / T18883 standard to compare, also lost the significance.
Choose formal company to choose formaldehyde detection, so as to ensure the quality of products. If you have anything else you don't know, you can pay attention to Meijia environmental protection