Fan coil plus fresh air system is divided into two parts, central air conditioning fan coil and fresh air system, fan coil is the central air conditioning terminal equipment, fresh air system to bear the fresh air load to meet the indoor air quality, fan coil plus fresh air system is an important form of water system air conditioning, but also the more common form of air conditioning in private buildings.

The advantages of fan coil plus fresh air system compared with the whole air system:
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.
2. The fan coil unit is small in size, small in footprint, easy to arrange and install, and even suitable for the transformation of old buildings.
3. It is easy to realize system partition control. The cooling and heating load can be divided into several regional systems according to room orientation, use purpose, fan coil use time, etc., and partition control is implemented.

Fan coil plus fresh air system compared with the disadvantages of the whole air system:
1. Due to the scattered setting of units, the number of units is large, and the maintenance management workload is large.
2. The indoor air quality is relatively poor, it is difficult to carry out secondary filtration and it is easy to cause condensation water seepage accidents.
3. The fan coil unit method itself solves the difficulty of fresh air volume. Because the static pressure of the unit fan is small, 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 fan coil and fresh air system coexist. Reasonable design, appropriate equipment selection and correct construction and installation can reduce the defects caused by fan coil and fresh air system. The above is just to know the advantages and disadvantages of fan coil and fresh air system. For designers, fan coil 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.
Horizontal concealed fan coil means that the installation position of the unit is the horizontal placement of the unit, and there is also a vertical unit. The concealed fan coil means that the installation position is inside the suspended ceiling, and there is also an open-mounted unit. Horizontal air outlet means that the air outlet direction of the unit is in the horizontal position, and there are also options for downwind and upwind.
The return air outlet of the fan coil unit is an air grid made on the suspended ceiling, which is of direct suction type. In addition, if a fresh air system is to be made, a separate air duct is introduced from the outside to supplement the fresh air.

There are many questions about the water pan connection and noise treatment of the fan coil.
The fan coil unit is small in size: the body is designed to be light and the drain pipe and circuit are easy to install, and the left and right connecting pipes and return air modes can be changed at any time, so that the unit can be installed in any space place with the combined site conditions of the fan coil unit.
The fan coil has high efficiency: the advanced tube expansion process ensures the close contact between the copper tube and the aluminum foil of the heat exchanger, and the heat transfer performance is good.
Fan coil low noise: reasonable fan and airflow structure design, high-quality sound-absorbing insulation materials, so that the unit noise is lower than the national standard 1-3dB(A).
Fan coil low energy consumption: fan and heat exchanger reasonable matching, three adjustable air volume, so that the fan power province.
Fan coil is a widely used terminal equipment in the purchase of central air conditioning. The full name of the specification is the central air conditioning fan coil unit, which can be simply classified as follows.
Central air conditioning fan coil according to the form is divided into: horizontal concealed, horizontal open, vertical concealed, vertical open, card type five, horizontal fan coil according to the thickness can be divided into: ultra thin, ordinary type.

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