The fresh air system has a significant effect on improving the pathogen problem. The following will be detailed from multiple aspects.

First, the function and working principle of fresh air system
Fresh air system is a kind of air conditioning equipment commonly used in modern buildings, its main function is to continuously introduce outdoor fresh air, and effectively discharge indoor dirty air. Through the operation of the fresh air system, the indoor air can be kept circulating and fresh, and a healthy and comfortable living environment can be provided for the occupants.
The working principle of the fresh air system is mainly based on the principle of ventilation. The system draws outdoor air into the room through the fan, and then distributes it evenly to each room after filtration, temperature adjustment, humidity adjustment and other treatment. At the same time, the system can also discharge the indoor dirty air outdoors, so as to ensure that the indoor air is clean and fresh.

Second, how does the fresh air system improve the bacteria problem

1. Air filtration: Fresh air systems are usually equipped with efficient air filters, which can filter out bacteria, viruses, dust and other pollutants in the air. These filters can effectively prevent germs from entering the house, thus reducing the risk of spreading germs.
2. Ventilation and ventilation: The fresh air system exhausts the indoor dirty air through continuous ventilation and ventilation, and introduces fresh air. This effect of ventilation can effectively dilute the concentration of indoor bacteria and reduce the possibility of indoor transmission of bacteria.
3. Temperature and humidity regulation: The fresh air system can also adjust the temperature and humidity of the indoor air, so that the indoor environment is kept in a suitable range. Appropriate temperature and humidity help to reduce the growth and spread of germs, thereby improving indoor air quality.
4. Reduce cross infection: In public places, such as schools, hospitals, etc., through the centralized management of fresh air systems, the risk of cross infection caused by personnel flow can be reduced.

3. Practical effect and case analysis

Many practical cases have shown that the fresh air system has a significant effect on improving indoor air quality and reducing the spread of germs. For example, in some hospitals and schools, areas with fresh air systems have significantly better indoor air quality than those without, while reducing the incidence of diseases caused by the spread of germs.
In addition, some studies have shown that fresh air systems can effectively remove microbial pollutants such as bacteria and viruses in the air. For example, during the COVID-19 pandemic, some fresh air systems equipped with HEPA filters have proved effective in filtering out viruses from the air, providing a safe indoor environment for occupants.
Iv. Conclusion
In summary, the fresh air system has a significant effect on improving the bacteria problem. Through its air filtration, ventilation, temperature and humidity regulation and other functions, it can effectively reduce the breeding and spread of indoor bacteria and improve indoor air quality. Therefore, in the process of architectural design and decoration, the necessity of installing fresh air systems should be fully considered. Especially in public places such as hospitals, schools, and special times such as epidemics, the application of fresh air systems is particularly important.
In addition, in order to ensure the effectiveness and performance of the fresh air system, regular maintenance and maintenance are also required. Only by maintaining a good operating state, can it give full play to its role in improving the indoor environment and reducing the spread of germs.