What are the benefits of hotel fresh air system? OK or not?

Different central fresh air systems should be configured in different occasions. In the hotel lobby, restaurants, dance halls and other places with large traffic, fresh air units with two-way flow should be configured. Because these areas have a large population and large area, they need a lot of fresh air, so it is best to choose a fresh air system with heat recovery. Hotel rooms can adopt negative pressure fresh air system, bathrooms can be equipped with fans and tuyeres, and living spaces can be equipped with air inlets with filtering devices. Negative pressure fresh air system has the advantages of convenient cleaning and maintenance, no secondary pollution and lower cost than two-way fresh air system.