If it has not been tested by a professional organization, the following suggestions are made:
1. Formaldehyde should be closed before testing 12 hours, which is the relevant standard issued by the Ministry of Health. If it is tested under ventilated conditions, it is meaningless;
2. If the indoor odor is large and particularly irritating, you should be more vigilant. Although the size of the taste is not necessarily related to formaldehyde, it tastes big. Under normal circumstances, the probability of formaldehyde exceeding the standard will be greater;
3. If the body has obvious uncomfortable reactions, such as decreased immunity, frequent colds, cough, dry eyes, throat discomfort and other symptoms, it is likely to be caused by excessive formaldehyde, and the data may not be low. If the data is low, the general reaction is not obvious, but it also depends on the individual's physique;
Therefore, before moving into a new house, it is recommended to find a professional institution to check it to ensure a safe stay.