Is there any opportunity for the emergence of fresh air system?

As early as the late 1970s, the term "indoor air quality (IAQ)" appeared in some Western countries. At that time, due to energy conservation considerations, the density of buildings was very high, which resulted in poor indoor ventilation, which led to frequent indoor air pollution incidents. Many people have experienced symptoms such as headaches, dry coughs, dry and itchy skin, dizziness and nausea, difficulty concentrating and sensitivity to odors. Developed countries have learned painful lessons about indoor air pollution, which prevents people from conducting in-depth research and discussion on the impact of indoor air quality on human health, pollutants and their sources, and feasible solutions. For this reason, the fresh air system appeared. The fresh air system uses physical principles to introduce outdoor fresh air and discharge indoor turbid air containing formaldehyde, benzene, ammonia and other harmful substances under the premise of not opening windows 24 hours a day, so that outdoor and indoor air can be fully exchanged to ensure indoor A microcirculatory system with plenty of fresh air. This system can provide the fresh air needed for human health and does not participate in regulating indoor temperature.