When is the best time to open windows for ventilation?

Some people are in the habit of getting up in the morning and opening the windows to change the air. This seems to be a very pleasant thing, but for people living in cities, this practice is not advisable. Because on some streets with heavy traffic, the lower atmosphere in the city is more stable at night than during the day, which is not conducive to the diffusion of pollutants. Therefore, around 6 o'clock in the morning, the concentration of pollutants is still very high. Therefore, opening the windows for ventilation in the morning does not bring fresh air, but is harmful to health. Here I will introduce to you when is the best time to open the windows for ventilation.

The best time to open windows

Generally speaking, windows should be opened for ventilation once in the morning and afternoon every day, each time for no less than half an hour. 9-11 a.m. and 2-4 p.m. are the best times to open windows for ventilation, because the air quality is best during these two time periods. In addition, the kitchen is an important source of indoor air pollution. When cooking, turn on the exhaust fan or range hood to remove harmful gases in time.

Benefits of opening windows

1. Open windows frequently for ventilation, which can effectively remove harmful gases in the indoor air and purify the indoor air.

It has been determined that if all doors and windows are opened and indoor and outdoor air convection is good, the indoor and outdoor air can be exchanged after 15 minutes.

2. Open windows frequently for ventilation, which can greatly reduce the content of pathogens in indoor air.

It has been measured that in an environment with closed doors and windows and polluted air, the number of bacteria in each cubic meter of air can be as high as tens of thousands. After opening the windows for ventilation, the number of bacteria is reduced to only thousands.

Opening the window can allow more sunlight to enter the room, allowing the ultraviolet rays blocked by the glass to directly enter the room, playing a role in disinfection and sterilization.

3. Open windows frequently for ventilation to increase the content of negative ions in the indoor air.

In general, there are only 40 to 50 negative ions per cubic centimeter in the indoor air of a city, while there may be 100 to 200 in the outdoor air; the air in rural fields may contain 700 to 1000, while the air in forests and seaside areas may contain more than 20,000.

Because negative ions in the air can improve the ventilation function of the lungs, excite the central nervous system, promote blood circulation and hematopoietic function, and enhance the function of the cerebral cortex, they are known as "air vitamins." The increase in the content of negative ions in indoor air can make people feel refreshed, happy and beneficial to health.

The above introduces some of the benefits of opening windows for ventilation. I believe everyone has already understood them. I also want to tell you that the room should be ventilated every day to ensure fresh air in the room. Clean the room in time, clear up dead corners, and do not provide a breeding ground for germs. At the same time, ensure that the air in the room is moist. You can use a humidifier or sprinkle water on the ground. Opening windows every day helps stay healthy.