The fresh air system is an independent indoor air treatment system consisting of an air supply system and an exhaust system. The utility model can keep the indoor air fresh when the doors and windows are closed, and effectively purify the outdoor dust and bacteria while maintaining the indoor temperature, which is helpful to people's healthy life. However, a fresh air system is not cheap, but it also requires regular cleaning and maintenance. Some people are more confused. Does the family need to install a fresh air system ? Here are six kinds of situations where you need to install a fresh air system at home . Let's take a look! 1. People who use air-conditioning and heating for a long time In families with long-term air-conditioning or habitual use of heating in winter, they often have closed windows and doors. Due to the lack of fresh air, the indoor produces terrible bacteria such as Staphylococcus aureus and Legionella, causing respiratory inflammation and repeated infections, even causing pneumonia. Respiratory inflammation is very similar to the symptoms of a cold. Most people mistake it for a cold and delay treatment. The fresh air system can renew the air in the room in real time, expel a large number of germs out of the house, and reduce the health hazards caused by germs to the family when using air conditioners or heating at home. 2. Families renovated within five years Domestic decoration, just completed renovation, almost all families, have the phenomenon of excessive formaldehyde, the degree of excessive formaldehyde in new homes is not appropriate, ranging from 2 to 3 times overweight, while exceeding the standard 6 to 7 times. Most of the owners think that it is safe to open the window and ventilate for three months. In fact, the concentration of formaldehyde emitted in the 3 to 5 years after the completion of renovation is very high, and then decreases year by year. This situation can continue until 15 years after the renovation. After the house is renovated, a fresh air system is opened, and the fresh air system can continuously exchange air for 24 hours, and the concentration of formaldehyde is reduced to a safe value at a relatively high speed. 3, have rhinitis, asthma, asthma and other sensitive groups For people with respiratory diseases, fresh air is most needed because most of the symptoms of these diseases are caused by allergens and toxins in the air. The fresh air system can effectively improve some allergy symptoms. People stay at home for an average of one day. The time is about 12 to 14 hours. Maintaining a clean indoor air environment will help sensitive people stay away from allergens in the air. 4, people afraid of noise The people living in the city, the vehicles roar, it is inevitable that the noise is relatively large. However, in order to have a quiet rest environment, many people often close the doors and windows. Although this isolates the noise, it will make the air unable to circulate and it will become increasingly uncomfortable. . The fresh air system can introduce clean, fresh, oxygen-enriched air from the outdoors, excluding dirty air from the home. After the installation of the fresh air system, there is no need to open windows for ventilation, and at the same time solve the problem of noise pollution. 5, full-time wife If all family members are office workers, installing a fresh air system is a bit wasteful. However, if there is a full-time wife at home, she spends most of her time at home, with outdoor smog, indoor fume pollution, decoration pollution, odor, and furniture release. TVOC and so on, are indoor air pollution sources; plus the weather in the north is dry and dusty, the air contains a lot of dust particles, and it takes several hours each day to wipe tables, chairs, furniture, TVs, refrigerators, cabinets... And so on, the newly cleaned room was soon put back to dust. Once the fresh air system is used to filter air, even if the table at home is not wiped for a week, there will be no dust on it. A competent husband will of course have to install it for her! 6, the elderly or children In smog weather, elderly people with asthma and cardiovascular diseases are prone to relapse, and severe cases can also cause myocardial infarction and cerebral infarction. Children before the age of 8 alveolar development and immaturity, susceptible to respiratory infections, children with respiratory tract stenosis, alveoli, sinus mucosal cilia function is not perfect, germs, bacteria easily take advantage of, and cause respiratory infections. The newborn has only 25 million lungs in one lung, and 80 PM2.5 blocked one alveoli. Therefore, before the child is 8 years old, healthy breathing is more important than anything else. With regard to the related content of the need to install a fresh air system at home , Xiao Bian has introduced it here for everyone. I hope to be helpful to everyone. In the above six situations, is your home in it? In fact, whether or not to install a fresh air system depends on the local air environment and the family situation. For more information, please follow this site! 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