Advantage 1: Flexible control, with the superiority of individual control, can flexibly adjust the temperature of each room, and determine the start and stop of the fan coil according to the use of the room.
Advantage 2: The fan coil unit is small in size, small in area, convenient in layout and installation, and even suitable for the transformation of old buildings.
Advantage 3: It is easy to realize system partition control, and the cooling and heating load can be divided into several regional systems according to room orientation, use purpose, use time, etc., and partition control is implemented.

Fan coil plus fresh air system disadvantages (compared with the full air system).
Disadvantage 1: due to the scattered setting of the unit, the number of units is large, and the maintenance management workload is large.
Disadvantage two: indoor air quality is relatively poor, it is difficult to carry out secondary filtration and condensation water seepage accident.
Disadvantage 3: the fan coil unit itself solves the difficulty of fresh air volume. Due to the small static pressure of the unit fan, the air flow distribution is limited, and it is practical for rooms with a depth of less than 6 meters.
The advantages and disadvantages of the fan coil and fresh air system coexist. Reasonable design, appropriate equipment selection, and correct construction and installation can reduce the defects caused by the fan coil and fresh air system. The fan coil only needs to know the advantages and disadvantages of the fan coil and fresh air system. For designers, they can learn from each other's strong points and offset their weaknesses. For consumers, they can seek advantages and avoid disadvantages and choose their own air conditioning system.

Description.
As the end device of the central air conditioning system, fan coil is widely used in many public places. Its main characteristics are as follows:.
(1), self-contained unit, flexible adjustment, fan coil for three gear speed change, and the waterway system can according to the user's room temperature setting, adopt cold and hot water automatic control temperature regulating valve adjustment, so that each room can independently adjust the room temperature, to meet the needs of different air conditioning users, the room can be manually shut down or automatically shut down when no one is used, and can make developers avoid overinvestment at one time to facilitate its rolling development, different rooms can be opened according to the situation of customers, thus reducing the operating costs of the overall system.
The partition control of the whole system is relatively easy. It can be divided into several areas according to the orientation, floor, purpose and usage time of the room, and the partition control is carried out according to the usage requirements of different customers, thus avoiding the reasonable side of the fan coil that the large wind tunnel system must be centrally controlled.
(2), fan coiling machine body is small, flexible layout, convenient installation, occupies less building space, easy to cooperate with the interior construction, but how to according to the different needs of the owners, combined with the design drawings to select a better fan coil applied to the actual project, should fully consider the following points:.
1), cold check.
Generally, the products are selected according to the calculated cooling load, but it should be noted that different fresh air supply methods will lead to different load cooling capacity of the fan coil unit. When the fresh air is directly sent to the room through the outer wall, the cooling capacity of the fan coil unit = indoor cooling load without heat and humidity treatment. When an independent fresh air system is set up, the cooling capacity of the fan coil unit = indoor cooling load, at present, the products in the market are generally nominal refrigerating capacity, while the cooling capacity in actual operation should be the cooling capacity × the average operating time per unit time, I .e. changing the operating time or air volume will affect the input cooling capacity of the unit, so it is not that the higher the nominal cooling capacity is, the better. If the unit is selected only according to the high cooling capacity, the cooling capacity will be too large, resulting in too low operating rate, reduced air exchange rate and increased room temperature gradient, fan coil will also increase the system capacity and equipment investment, air conditioning energy consumption increased, air conditioning effect is reduced, so the cooling capacity only as one of the necessary conditions for the selection of equipment, but also should take into account other factors.
2), air volume check.
Dimensions of concealed fan coil inspection openings.
Problem: In the hotel, the fan coil in the guest room is cleaned and overhauled, although an inspection port is left, the fan coil cannot be taken down. In the process of cleaning, the ceiling will be destroyed during the overhaul, which will affect the use of the guest room.
Reason: When the fan coil is installed horizontally, many owners design no access port, or check the location of the access port is wrong, or the size is too small, 600*500,450*450, which cannot meet the needs of maintenance, resulting in poor operation, resulting in blockage, reduced air volume and cooling capacity, and room temperature cannot meet the requirements.
Solution:.
1) it is best to use the activities of the ceiling, such as the hall with light steel aluminum strip can be taken down, the maintenance of fan coil is very convenient.
2) The ceiling can also be divided into several pieces, each piece can be removed, and the return air outlet is opened beside the wall cabinet.
3) There are also hinges like cabinet doors to handle the return air outlet.
4) The size of the inspection opening shall be considered to be convenient for disassembly and replacement.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures