The fresh air system, characterized by efficient purification and filtration of PM2.5, and ensuring indoor oxygen content, has quickly occupied the air purification market. In just a few years, the fresh air system has rapidly penetrated from high-end office buildings to ordinary households. The new air system has a single air supply function, and has developed into an air purification equipment with multiple functions such as oxygenation, purification, dehumidification, deodorization, sterilization, and heat exchange, becoming the first choice for people to choose air purification equipment. The fresh air system can scientifically organize airflow, improve indoor air quality, continuously provide fresh air for indoor use 24 hours a day, and ensure respiratory health. The fresh air system generally inputs more air than it draws out, resulting in a positive pressure that allows indoor clean air to be slowly squeezed out through the door gaps, avoiding unfiltered outdoor air from being sucked in through the door gaps, ensuring indoor air cleanliness.

At the same time, the fresh air system can expel harmful indoor gases, effectively eliminating various harmful gases such as fumes, methanol, second-hand smoke, etc. After installing a fresh air system, newly renovated residential or office spaces can greatly shorten the empty time for removing odors and formaldehyde, reducing the risk of respiratory and cardiovascular diseases. For example, after installing intelligent fresh air systems in classrooms of Caihe Second Kindergarten, Lvcheng Yuhua Primary School, Yucai Primary School, and other schools, the monitoring results showed that after installing fresh air systems in classrooms for six months, the phenomenon of students catching colds and coughing was significantly reduced.

The fresh air system was gradually recognized by the public after the SARS outbreak in 2003, but at that time, the main function of the fresh air system was to improve ventilation. In recent years, with severe haze, most fresh air systems have developed filtration and purification functions, and the filtration efficiency of PM2.5 is high, ensuring that fresh and clean oxygen is replenished indoors at any time. This is incomparable to other air purification equipment. In the future, our country may spend more than a decade or even decades to control air pollution, and in parallel with this will be the popularization of air purification systems in Chinese households. After all, breathing is a big thing that everyone cannot stop. The technological innovation in the fresh air system industry will enable more and more consumers to enjoy healthy and clean fresh air. There are various types of air purifiers on the market today, and their performance is also uneven. Consumers can pay attention to the purification efficiency and filter lifespan of the product when choosing. For example, the CN-KJGS75 wall mounted fresh air system jointly developed by Lingte "Yiaipu" brand fresh air purification system company and Vanke Building Research Center is a very user-friendly product that intercepts 99.2% PM2.5 fine particles. The use of H12 grade high-density HEPA filter can further extend the lifespan of the filter, reduce later usage costs, and efficiently remove haze, methanol, and PM2.5. It also has real-time display of PM2.5 data and mixed air function. The minimalist design of the wall hanging is customized for the unit type, without the complicated installation of the traditional central fresh air system. Only four screws are needed to lock all four and fix the main unit; Complete indoor air replacement can be achieved in less than an hour, with a super large air volume of 60 cubic meters per hour, increasing indoor oxygen content and refreshing as if in a wilderness.