Will indoor formaldehyde concentration also increase when the temperature is high in summer?

After summer, everyone will obviously feel some odors appear indoors for no reason. Even staying at home may cause body reactions such as eye irritation or throat discomfort. This is actually caused by formaldehyde. Summer happens to be the season when indoor formaldehyde evaporates most rampantly, so everyone should be more protective of indoor air pollution in summer, especially the harmful gas formaldehyde. In different seasons of the year, the level of formaldehyde is The difference in release amount is relatively large. In winter, the probability of indoor formaldehyde exceeding the standard is only about 10%. In spring and autumn, the probability of indoor formaldehyde exceeding the standard is about 30%. However, during the high temperature period in summer, the probability of indoor formaldehyde exceeding the standard is very low. The probability will be as high as more than 80%. It can be seen that temperature is the main reason that affects the indoor formaldehyde concentration. Next, let’s talk about the topic of formaldehyde released at high temperatures!

First of all, the indoor temperature is generally very high in the summer, which causes the formaldehyde in decoration materials and furniture to evaporate faster, that is, the formaldehyde inside these pollution sources will be transferred to the indoor air. During the normal season, formaldehyde transfers slowly. In hot weather, formaldehyde transfer will accelerate. At the same time, the indoor humidity will also increase during the summer period. Since formaldehyde is very easily soluble in water, at this time There is also a lot of formaldehyde in the water molecules in the air, which can directly lead to an increase in indoor formaldehyde concentration.

Secondly, the volatilization point of formaldehyde is 19 degrees Celsius, and the indoor temperature in summer can generally reach more than 25 degrees Celsius. When the indoor temperature rises by one degree Celsius, these pollution sources will evaporate indoors. The speed of formaldehyde will increase by about 0.4 times. When the indoor temperature rises to 30 degrees Celsius and the indoor humidity reaches 50%, then even if the indoor formaldehyde does not exceed the standard, the indoor formaldehyde concentration will reach 0.22 at this time. The value is about milligrams per cubic meter. If the indoor temperature is as high as 35 degrees Celsius, the indoor formaldehyde concentration will double at this time, because the release rate of formaldehyde will double. Of course, the rate of formaldehyde release is not affected by temperature and humidity. It will also be affected by factors such as air pressure.

Finally, the materials used by each household during decoration have different environmental protection levels, so the indoor formaldehyde concentration also varies. The more luxurious the decoration, the more materials will be used. Then the indoor formaldehyde concentration will inevitably be higher, mainly due to the effect of superimposed formaldehyde release, so environmentally friendly materials do not represent environmentally friendly decoration!