Open or close the windows on a foggy day? This is a great concern for everyone. If you open the window on a hazy day, the indoor PM2.5 will rise. However, if the windows are not opened for a long time, the indoor air will not become fresh. Staying in such a house, you will also feel uncomfortable. So what should be done in the end?
First, hazy days should open the window less
Why do we need to open the windows? It is because we need to breathe fresh air. Tightly closed doors and windows is not conducive to ventilation, for the requirements of ventilation, we need to open the windows to put outdoor oxygen house to come. However, the hazy weather outdoor air is no longer fresh air when the dirty weight of the air exceeds the standard. Even when the heavy outside air is up to standard, the PM2.5 concentration is likely to be higher than indoors. According to the aerodynamics, the movement of the gas will change when it meets the wall, so the indoor air quality is better than outdoor on hazy days. Therefore, the windows should be opened as little as possible in the hazy days to reduce the external environment particulate matter into the room.
Second, although the air quality is poor should also open the window for a short time
People go out and return home with bacteria and microorganisms, people exhale carbon dioxide indoors, smoke and cook indoors will also produce pollutants. If you don’t open the windows, the microbial and bacterial content in the house will gradually add up, and the concentration of carbon dioxide will also gradually increase, so you need to open the windows for a short time on a hazy day.
When opening the windows, try to avoid the morning and evening haze peak hours, you can open the windows a slit ventilation, do not let the wind blow directly in, ventilation 10 ~ 20 minutes can be. If you encounter continuous haze days, you can hang a wet towel near the screen when you open the windows, which can play a role in filtering and adsorbing fine particles.
Note that if there are influenza patients at home, it is more important to open the windows every day to ventilate the indoor air, otherwise the influenza virus is easily transmitted to other people at home.
Three, open the window time has to be careful
In hazy days, you can open the windows in time after the haze has dissipated and the sun has come out, because the air is relatively better when there is sunlight. It must be remembered that the windows cannot be opened when the sun is not yet out and after the sun goes down, because the air quality is poor at these times. It is advisable to open windows at noon and avoid opening windows in the morning and evening when the haze concentration is high. If you live near the road, try to open the windows less during the day when there is more traffic.
Four, everyone can use the “nine strokes of haze prevention”
The first move: wear a mask
Although wearing a mask can not completely block the inhalation of harmful particles, but set up an additional layer of barrier for the respiratory tract, better than no protection.
The second trick: wear long clothes
Do not dress up short for the sake of style, wear too fragmented to increase the body and harmful air contact area, wear a long coat, both warm, but also healthy.
The third trick: outdoor “short and quick”
In hazy weather, to reduce the time spent outdoors, a short stay, calm breathing, and small steps.
Fourth trick: wash your face first when you enter the house
”After staying outdoors in full armor, the place where the skin is most exposed to harmful particles is the face and hands, so it is important to wash your face and hands in time when you get indoors.
The fifth trick: nasal breathing
Nasal hair and mucus in the nasal cavity adsorbs harmful particles in the air, and breathing through the mouth, it goes straight to the tonsils, so be sure to breathe through the nose.
Sixth trick: blow your nose
Clean the nasal cavity on time, note that to blow the nose, not digging nose, digging nose will damage the nasal cavity, as self-destructive “Great Wall”.
The seventh move: smart open the window
Learn to open the window smartly, haze prevention, disease prevention both miss.
The eighth move: early to bed
Try not to stay up late at night, the air is bad, early to bed can improve the body’s immunity, thereby preventing disease.
Ninth move: drink more water
Water is the source of life, now the air quality is poor, drink a little more water, can accelerate the renewal of water in the body, very good for the body.