Opening windows for ventilation is an important measure to maintain fresh indoor air and human health, especially for the elderly who have lived indoors for a relatively long time. Therefore, opening windows for ventilation is particularly important. The winter weather is cold, and some people do not open their windows because they are afraid of the cold, which is not advisable. Long term non opening of windows can lead to a decrease in indoor air quality, which can easily accumulate dust, bacteria, and viruses, increasing the risk of respiratory diseases Wu Hailing, Deputy Chief Physician of the Respiratory Department at Beijing Geriatric Hospital, said that opening windows for ventilation also requires attention to methods to avoid discomfort or health problems. Wu Hailing suggests that when the weather is cold, it is advisable to open windows for ventilation for a short period of time, about 10 minutes each time, 2-3 times a day, to reduce indoor heat loss. During ventilation, elderly people should wear warm clothing to avoid catching a cold due to the cold wind. It is best to avoid opening windows for ventilation in the early morning and late night. The air humidity in the morning is relatively high, and there may be more dust; The temperature is low at night, and the cold air can easily irritate the respiratory tract. It is recommended to ventilate between 10am and 3pm, during which the air quality is usually better. Wu Hailing reminds us to avoid direct cold winds and crosswinds. The respiratory and nervous system functions of elderly people gradually decline, and their immunity is weaker. When opening windows for ventilation, it is important to avoid direct cold air blowing on the body, especially on the head and joints. Suggest using screens or curtains to block the air vents. Try to avoid the formation of drafts to prevent excessive indoor temperature differences from causing colds or joint discomfort. (New Society)