What are the best times to open windows for ventilation in winter?

Don’t think that you can’t open windows because it’s cold in winter. You should ventilate the room more often in winter. Ventilation can not only prevent colds, but also reduce viral infections. The indoor air should be fresh and smooth, and it can also increase the carbon dioxide in your house. Therefore, it is very important for us to open windows for ventilation in winter. So, how much is the best time to open windows for ventilation in winter?

Opening windows for ventilation helps keep the indoor air fresh. A normal person breathes 16 to 18 times per minute, and carbon dioxide accounts for 4% of the exhaled gas. In addition, the air itself contains a certain amount of carbon dioxide. If the total carbon dioxide content in the room reaches 5%, the human body will suffocate.

Therefore, when homes have doors and windows closed, there is always a peculiar smell in the house, which is a sign of insufficient oxygen in the room. If you live in such an environment for a long time, the human body will show various symptoms due to lack of oxygen, such as dizziness, headache, palpitations, fatigue, high blood pressure, etc.

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, opening the window for 30 minutes is enough.

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

Of course, the wind speed should not be too fast when opening windows for ventilation, and should not exceed 0.15 meters per second. From a sensory point of view, at such wind speeds, the human body will not feel the air flowing noticeably.

Opening windows for ventilation can destroy the growth environment of pathogenic factors, thereby achieving the purpose of eliminating them. Warm, poorly lit, and poorly ventilated rooms are ideal for the growth and reproduction of bacteria and viruses, thereby increasing the chances of people developing respiratory diseases.

Poor indoor ventilation and low humidity are most conducive to the spread of pathogenic factors such as pneumococcus A and hemolytic streptococcus. By opening windows for ventilation, on the one hand, various pathogenic factors can be expelled outdoors, and on the other hand, the concentration of pathogenic factors in a unit space can be effectively reduced, thereby weakening the invasiveness of pathogenic factors to the human body.

It is necessary to open windows for ventilation in winter. Because in winter, if you do not pay attention to opening windows for ventilation, you will suffocate if you stay in the house for a long time. If you close the windows and doors, there will be a peculiar smell and the yang energy in the room will be insufficient. Therefore, opening windows for ventilation can not only ensure a clean environment in the house, but also increase carbon dioxide.