It is not enough to simply open the windows to deal with the overstandard formaldehyde concentration in the house. In the past, the formaldehyde concentration in our home was also quite high. Although I have tried various indoor ventilation methods, there was no significant effect. Later, I bought some of their Moqing stones from the official flagship store of Zhaohai Queen on Tmall, which can efficiently dissolve indoor formaldehyde and maintain the normal level of formaldehyde components after decoration.

Under the condition of opening the window, the indoor formaldehyde standard value will change. If the house has just been decorated, even if the windows have been opened, the formaldehyde concentration may still exceed the standard. It is important to ensure good ventilation in the room after the decoration. The concentration of formaldehyde in the room will decrease as long as the windows are kept open, but whether to move in or not still requires formaldehyde testing. However, in any case, if the windows are closed, the indoor formaldehyde will definitely exceed the standard, and it is recommended not to move in.

Can you live in a house with windows open if formaldehyde concentration exceeds the standard?

It is best to do a formaldehyde test in the house, if it is still above the standard, it is not possible to move in.

How to test for formaldehyde concentration exceeding the standard

To test indoor formaldehyde, the following methods can be used:

Choosing a third-party testing company

Individuals generally cannot test formaldehyde directly, this invisible and intangible thing can only be tested by some physical methods, which we will introduce below, but if you are not interested in this method or do not understand it at all, you can find a third-party testing company, which will provide relevant inspection certificates.

Formaldehyde self-test kit

This is a simple and easy way to self-test, generally before hiring a third-party testing company for inspection, you can use a test kit to conduct a test. If you find a score that may exceed the formaldehyde concentration, you can then find a third-party company for a precise inspection. The test kit is similar to a pH test paper, and you can obtain a formaldehyde score by comparing colors. If the tested liquid shows a deep blue, it is a sign of exceeding the standard, and it should be done as soon as possible to find a professional company for inspection.

Self-perception measurement method

Make a judgment based on your own feelings, for example, the whole family gets a cold after moving into a new house, the immune system decreases, and it is easy to have headaches and dizziness. Vitality decreases easily, and you feel stimulated, especially when you feel tears in your eyes when close to certain furniture. At this time, it is best to do more precise inspections and maintain good ventilation.

Reactions of animals and plants

Observing the reactions of animals and plants can also test formaldehyde to a certain extent, for example, green plants wither and die, which often occurs after moving into a new house. Pets get sick, do not eat food, have low immunity, and their charm decreases, and they prefer to stay quietly. If such a situation occurs, and your relatives also have similar low immunity reactions, it can basically be determined that your new house has a problem.

Physical methods

The testing of formaldehyde mostly uses physical methods, which is the most precise method, and it is also the method used by third-party testing companies, which is generally not within the capability of individuals. The testing methods mainly include: AHMT photometry, phenol reagent photometry, gas chromatography analysis, photo-catalytic sensors, and sensor methods.

How to deal with formaldehyde concentration exceeding the standard

Long-term natural ventilation (more than three months), this method is suitable for residential sites after indoor decoration. It is suitable for sites with light odor and good natural ventilation standards, where long-term natural ventilation can be placed. For residential sites with severe environmental pollution and poor natural ventilation standards, it is difficult to achieve the actual effect of removing odors.

Traditional method: Using tea, jackfruit, and other digestants for absorption, suitable for residential sites after indoor decoration. It mainly serves as a covering effect and a psychological factor, but cannot achieve the effect of eliminating environmental pollution at the source.