The fan coil unit should be exposed or concealed according to the specific conditions of the room and the decoration requirements, and the installation location and form should be determined. The fan coil unit plus fresh air system is divided into two parts, the central air-conditioning fan coil unit and the fresh air system. According to the external static pressure of the fan coil, it can be divided into standard type and high static pressure type, and according to the number of heat exchange coils, it can be divided into two rows and three rows.

Advantages: The coil is small in size and occupies a small area, which is easy to arrange and install, and is even suitable for the renovation of old buildings; Advantages: It is easy to realize the system partition control, and the system can be divided into several regional systems according to the room orientation, purpose of use, use time, etc. . , partition control can be implemented. Disadvantages of the coil plus fresh air system (compared with the whole air system) Disadvantages: Due to the scattered units, the number of units is large, and the maintenance and management workload is large; Disadvantages: The indoor air quality is poor, it is difficult to perform secondary filtration, and condensate water leakage is prone to occur ACCIDENT. Disadvantages: The coil method itself is difficult to solve the problem of fresh air volume. Due to the small static pressure of the unit fan and the limited airflow organization, it is more practical for rooms with a depth of less than 6m. The advantages and disadvantages of the coil plus fresh air system coexist. Reasonable design, proper equipment selection and correct construction and installation can reduce the defects caused by fan coil units and fresh air systems. The above is just to understand the advantages and disadvantages of fan coil units and fresh air systems. For designers, they can learn from each other. For consumers, they can seek advantages and avoid disadvantages and choose the air conditioning system that suits them.

According to the structure, it can be divided into: vertical type, horizontal type, wall-mounted type, card type, etc. The vertical fan coil unit is divided into column type and low type; according to the installation method, it can be divided into exposed installation and concealed installation; according to the direction of the water inlet, it can be divided into left type and right type. Fan coil unit wall-mounted coil units are all surface-mounted units with compact structure and good appearance, which can be directly hung on the wall. Horizontal units are mostly hidden in the ceiling, and there are two air supply methods: the upper side air supply box ceiling supplies downward air. If the side delivery method is adopted, the coil with lower static pressure can be selected, and the outlet of the unit is directly connected to the double-layer louver; if the air supply under the ceiling is adopted, the high static pressure coil should be used, and the air supply port of the unit can be connected to a section of air duct. Connect several diffusers to supply air below. Fan coil units are ideal end products for central air conditioners, and are widely used in hotels, office buildings, hospitals, commercial residences and scientific research institutions. After cooling the central air conditioner, the water at 7°C is sent to the coil, and after being exchanged in the coil, it becomes cold air at 15-16°C, which reduces the room temperature. Therefore, after the central air conditioner is used for a period of time, it is necessary to clean the aluminum fins of the fan to solve the above drawbacks.