First, arthritis, diabetes patients should be careful with humidifiers 1. Arthritis, diabetes patients should be careful with air humidifiers. Humid air will aggravate the condition of arthritis, diabetes, so it is generally not recommended that such patients. 2. Can not directly add tap water to the humidifier. If the tap water hardness is high, the humidifier spray water mist contains calcium and magnesium ions, will produce white powder, pollution of indoor air. 3. Adjust the humidity of the humidifier according to the weather conditions, indoor and outdoor temperature at any time. Indoor and outdoor humidity rises, humidifier humidity should be adjusted down in time, otherwise it is not conducive to human health. If the weather becomes too dry, and the humidifier humidity should be adjusted high, otherwise it will weaken the role of the humidifier. Second, keep warm in winter doors and windows closed is a taboo Survey shows that many factors affecting indoor air quality, indoor air may affect human health in several major factors, poor ventilation accounted for 48%, home improvement accounted for 18%, building components accounted for 3.5%. Researchers often use carbon dioxide levels as an important indicator of indoor air conditions. A person exhales 22 liters of carbon dioxide per hour under normal conditions and 80 liters of carbon dioxide per hour when engaged in heavy physical activity. If the indoor ventilation is poor, these human exhaled carbon dioxide will be gathered indoors, thus affecting human health, while the fresh outdoor air can be diluted indoor pollutants, so the windows should be opened often to let the indoor air flow. The so-called ventilation does not mean that the windows and doors should be open all day, to reasonably choose the ventilation time. According to research and testing, in the city, day and night there are two pollution peaks and two relatively clean trough. Two pollution peaks generally around sunrise and evening, two relatively clean time is 10 a.m. and 3 p.m. around this time can be appropriate to open the window. Cold winter days, but the windows should not be less than two times a day, each time not less than 15 minutes, up to 30 minutes. Third, the humidifier should be cleaned weekly to increase the humidity of the air to avoid inducing various types of respiratory diseases. Winter is the high incidence of respiratory diseases, winter climate dry, buy humidifier, appropriate increase in air humidity, can effectively reduce the occurrence of various types of respiratory diseases. Humidifier should change the water every day, and it is best to clean once a week to prevent microorganisms in the water dispersed into the air. Fourth, with a humidifier to prevent "humidification pneumonia" indoor air humidification, can be sprinkled, placed in a water basin, etc., but the most convenient or the use of humidifiers. Humidifier in use, if not regularly cleaned, humidifier mold and other microorganisms with the aerosol into the air, and then into the human respiratory tract, easy to suffer from "humidification pneumonia". Air humidity is not the higher the better, if the air humidity is too high, people will feel chest tightness, breathing difficulties, so humidification should be moderate as well. Once the air humidity is lower than 20%, the indoor respirable particles increase, it is easy to make people suffer from colds. When the air humidity is 55%, germs are harder to spread. The most beneficial to human health air relative humidity should be between 45 to 60%; the human body feels comfortable indoors the best relative humidity is 49 to 51%, it is recommended that the best indoor temperature should be maintained at 16 to 24 ℃. Fifth, the use of humidifiers is best placed in a 1-meter-high place In order to allow better circulation of moisture, it is best to put the humidifier on a 1-meter-high table dedicated to placing humidifiers, so that humidifiers spewing out moisture right in the body's range of activities, at the same time, the indoor air at this height is easy to circulate, so that the humidity can be sprayed to better be used up. Humidifier sprayed moisture scattered "range" of about 1 meter, therefore, it is best to keep a distance of about 1 meter with home appliances, furniture, etc.. Do not put the humidifier next to the wall, so that the humidifier spray mist is easy to leave a white mark on the wall. Long-term use of humidifiers in the family, the use of the best configuration of the humidity meter and temperature meter, the indoor humidity will be maintained in a certain range, in addition, the prolonged use of humidifiers, and is not conducive to human health. The best relative humidity for the human body to feel comfortable indoors is 49 to 51%. The best temperature for the human body to feel comfortable indoors should be 16 to 24 ℃.