When is the best time to open windows for ventilation during the epidemic? When is the best time to open windows for ventilation during the new coronavirus epidemic?

We all know that opening windows for ventilation is a way to prevent and control viruses. Many people often open windows for ventilation to improve indoor air, reduce virus concentration, and avoid virus infection. There are also certain requirements for opening windows for ventilation. So, when is it better to open windows for ventilation during the epidemic? Let's take a closer look!

When is the best time to open windows for ventilation during the epidemic?

The best time to open windows is between 9:00 and 11:00 in the morning or between 2:00 and 4:00 in the afternoon, because during these two periods, the temperature has risen, the harmful gases accumulated in the bottom layer of the atmosphere have dispersed, and the ventilation effect of opening windows is better.

It should be noted that it is not advisable to open windows for ventilation too early, for example, at six or seven o'clock. It does not mean that the earlier you open the windows, the lower the freshness of the air. In fact, at six or seven o'clock in the morning, even the air outside still has a high concentration of pollutants.

Opening windows should also be determined based on local climate conditions and the wind direction of the day. The sun has risen, the temperature has risen, and the harmful gases will gradually dissipate. If it is a rainy day, or there is very serious haze, it is not recommended to open the windows. On rainy days, various harmful gases outside are particularly easy to enter the house, which will cause certain pollution.

Is it better to open windows for ventilation during the epidemic period, during the day or at night?

It’s better to open the window in the morning.

Because in the early morning as the sun rises, the garden plants in the green space begin to photosynthesize, absorbing carbon dioxide and releasing oxygen, so the carbon dioxide content in the air gradually decreases, and the air naturally becomes fresher. At night, the closed room is filled with carbon dioxide discharged by the human body and is relatively turbid. At this time, it is necessary to open the windows for ventilation.

Choosing to open the windows in the morning can not only expel the polluted air in the room, making the room fresh and unobstructed, but also bring in the freshness of the morning visually, which helps to start the day in a good mood.

Is it okay to open windows 24 hours a day during the epidemic?

not good.

For example, it is not advisable to open windows during rush hours. At this time, the air quality outside is poor, and there are a lot of car exhaust and bacteria. Opening the windows will allow polluted air to flow into the room, which is not good for your health. In addition, if the windows are opened for a long time, the room temperature will also become low in the winter when the temperature is low. For the elderly and children who are afraid of cold and have poor resistance, they are prone to catching colds.

How long should we open windows for ventilation during the epidemic?

It is recommended to open the windows 3-4 times a day, each time for about 30 minutes.

Opening windows for ventilation helps keep the indoor air fresh and reduce pathogenic bacteria in the air. Generally, when the temperature difference between indoor and outdoor is 20℃, it takes 9 minutes to completely ventilate an 80 cubic meter room; if the temperature difference between indoor and outdoor is 15℃, it takes 11 minutes to open the window; if the temperature difference cannot be accurately grasped, then opening the window for 30 minutes is enough, and it is best to open the window 3-4 times a day.