The NAISIDA team provides services for the humidity control project of Guangzhou Chimelong Panda Hotel and Zhuhai Chimelong Hengqin Bay Hotel. High-end hotels have requirements for fresh air in the room. Normally, fresh air fans are used to send fresh air to the room. When the outdoor air humidity is high in spring and summer, sending fresh air into the room will also cause the relative humidity of the room to be too high. The relative humidity of the living environment is usually controlled between 40%-60%. Excessive humidity will cause furniture, bedding, and clothing. In case of mildew, the air in the room has a heavier musty smell. As long as the relative humidity in the room does not exceed a certain limit after using the Nesda dehumidifier, it can effectively prevent the items from becoming mildew and create a comfortable living environment.