Duct Machine

What Is The Duct Fan

What Is The Duct Fan

With the improvement of people’s living standards, the requirements of home quality have also been unprecedentedly improved. Central air conditioning has gradually replaced the traditional cabinet hanging air conditioning and entered people’s life.
As an entry-level product of central air conditioning. The air duct fan saves space and has high-cost performance. Which has been favored by many users. However, many people still have doubts. First, learn about the relevant knowledge of air duct fans.

Difference Between Duct Fan And Central Air Conditioner

The central air conditioner we often say refers to the multi-on-line system. In fact, the air duct machine is also one of the central air conditioners. It is a type of one driven by one. An outdoor unit drives an indoor unit. The air conditioner is connected with the air duct to supply air to the room, which is embedded and hidden.

The price of a domestic air duct fan is cheaper than that of a central air conditioner. And there are many application scenarios of a commercial air duct fan. The difference between the duct fan and the central air conditioner multi-line is the number of external machines. For a simple example, when installing three internal machines, three external machines are required to use the duct fan. While only one external machine is required to use the multi-line. However, the effect is the same after the installation of an air duct fan and multi online internal machine, which are completely hidden in the ceiling.

spiral duct fan connect

If the two are compared, the air duct fan is suitable for small houses with Limited decoration funds, or large-area houses with low frequency of air conditioning; Multi online is suitable for long-term housing, and it is more cost-effective to install a large area. Compared with the air duct fan, the multi line machine has higher technical requirements and better comfort.

Which is suitable for people with higher requirements for quality of life; If you just want to meet the needs of small houses and require cost performance, then the air duct fan is a better choice.


The air duct fan is “one driven by one”, which is composed of an outdoor unit and an indoor unit. Central air conditioning is “one drag many”, and an outdoor unit can be used with several indoor units at the same time. Secondly, the power consumption is different; Most air duct fans are fixed frequency, and central air conditioners are basically variable frequency.

Generally, air ducts consume more power. Finally, the installation distance requirements for internal and external machines are also different; The air duct fan is required to be 15m, and the central air conditioner can reach a further distance.

Central Air Conditioner

Specific Differences

  • Different Structure

The air duct fan is “one driven by one”, which is composed of an outdoor unit and an indoor unit. Like the traditional air conditioner, each internal unit needs to correspond to an external unit, but the traditional wall hanging mode is changed to the air duct mode.
Central air conditioning is “one drag many”, and an outdoor unit can be used with several indoor units at the same time. That is, multiple indoor units are set in the whole house, and only one outdoor unit needs to be installed outdoors.

  • Different Power Consumption

Most of the air duct fans are fixed frequency, and the central air conditioner is variable frequency. Generally, the air duct consumes more power.
In addition, the duct fan is an indoor unit and corresponds to an outdoor unit. The central air conditioner can form a system with several indoor units and an outdoor unit. Therefore, in the same space, central air conditioning needs fewer outdoor opportunities and will save more power.

  • Different Flexibility

Like traditional air conditioners, duct fans can be selected separately for each space and configured according to the corresponding power required by the actual space.
When designing the outdoor unit of the central air conditioner, the power is confirmed according to the overall demand, so it is not as flexible as the air duct unit in configuration and application range.

  • The Noise Generated Is Different

The influencing factors of noise include the brand, model, configuration, and even installation of the air conditioner. Although there is no way to comment uniformly, according to the user’s reaction, the noise of the air duct fan will be higher than that of the central air conditioner.

  • The Installation Distance Are Different

The distance between the internal and external pipelines of the conventional air conditioner shall not exceed 8m as far as possible, while the air duct fan is 15m, and the central air conditioner can reach a further distance.

  • Different Prices

Duct Fan is a product launched by manufacturers to fill the middle market of small air conditioners and central air conditioners, so it is worse than central air conditioners in energy efficiency and mute, and the price will be lower than the central air conditioner.

Air Conditioner

What Are The Advantages of Duct Fan

The price is reasonable. With the same area and the same cooling capacity, the price difference between the air duct fan and the cabinet and hanging air conditioner is not too much, but the use of the air duct fan in space is more reasonable, does not occupy the ground area, saves a high cost for users, and will not cause a sanitary dead corner. Only a local ceiling is needed.


High aesthetics. From the aesthetic point of view, the air duct machine is better than the cabinet machine or hanging machine. Only the air outlet can be seen indoors, which does not damage the decoration pattern and occupy a position.


The room temperature is evenly distributed, and the cooling capacity of the air duct fan is evenly distributed. Through the reasonable design of air outlet and return, the room temperature is uniform, which can meet the comfortable enjoyment of customers to the greatest extent.

Fan of the duct
  • It Is Beautiful And Does Not Occupy Space

The installation of the air duct fan is now the central air conditioner, which is to install the inner unit of the air duct in the ceiling, with the external air outlet and maintenance port, so the overall feeling is much better than that of the cabinet and hanging machine. The installation of the air duct fan adopts the ceiling method and the wiring and pipes are all hidden, which is carried out simultaneously with the home decoration, which will not damage the beauty of the indoor decoration, but also improve the grade of the indoor decoration.

  • Cheap Price

Central air conditioning can bring more comfortable enjoyment to users, but central air conditioning does not enter users’ homes in a large area. The most important reason is that the price of central air conditioning is expensive, which is unacceptable to many users. The emergence of air duct fans enables users to enjoy the effect of central air conditioning, and the price is much cheaper than central air conditioning, which can be accepted by most users.

  • Flexible Installation

The air duct unit of central air conditioning adopts the form of “one-to-one”, that is, one indoor unit and one outdoor unit. Therefore, it is more flexible in installation. Indoor units and outdoor units can be installed freely according to the actual situation. There will be no installation of outdoor units of central air conditioning, and the installation is affected by the installation position of indoor units.

  • Comfortable Use Effect

At the same time, it is better to enjoy the gentle and comfortable indoor air cooling effect than the traditional air conditioner. The air outlet of the central air-conditioning duct fan does not touch the dust and will not pollute the indoor air, which is also the advantage of the duct fan.

air duct Fan

What Are The Disadvantages of Duct Fan

  • Fixed Frequency Technology

Duct fan air conditioning only has fixed frequency technology, which is more inconvenient compared with frequency conversion technology, and it adopts one-to-one mode, so it requires more locations of external units, which is also very troublesome. The air duct fan adopts fixed frequency technology, and the air duct fan controls the temperature through the air valve, giving the user the illusion that the compressor has stopped. In fact, the compressor has not stopped, so the air duct fan consumes a lot of power.

  • Loud Noise

Because the air duct machine should be hidden in the ceiling, it is necessary to make full preparations before installation design, which is generally designed at the beginning of decoration. The air duct fan is a central air conditioner driven by one. If multiple indoor units are installed, multiple outdoor units shall be installed accordingly, which will affect the beauty of outdoor decoration. In addition, the noise of the air duct fan is high when it is running again, which will affect the rest of the family.

When Is The Duct Fan Usually Installed

The air duct fan is generally installed at the same time when the water and electricity enter the site. Generally, after the wall knocking is completed, the slotting begins to prepare for installation. The electrician needs to set out according to the installation position of the air duct fan, so be sure to install the air duct fan before the carpenter enters the site.

Woodworkers should use the ceiling and reserve the air outlet according to the position of the air outlet. Considering these factors, it is best to determine the configuration scheme of the air duct fan in the early stage of decoration, and determine the power and the position of the air outlet in advance, to facilitate the orderly construction in the later stage.

air duct

How to Select The Air Outlet Mode of Air Duct Fan

If the floor height is not very high and local ceiling is designed, the way of side outlet and lower return can be selected. That is, the air outlet is on the side and the air return is below; If the floor height is relatively high or the whole ceiling is made, the lower air outlet and lower return are generally made, that is, the air outlet and return air outlet are blowing downward, the air outlet is generally side air outlet, and the air duct is to guide the wind blown out of the side air outlet downward.

Disassembly And cleaning

The assembly and disassembly of the air outlet of the air duct machine are simple and convenient. Just unscrew the fixed screw. The filter screen of the air outlet can be simply cleaned with a brush. There is a filter screen at the return air inlet, and the machine also has a filter screen. The dust is generally on the filter screen, which is very convenient for cleaning.

Setting

During the installation of the indoor unit, an access hole shall be reserved to facilitate later maintenance and troubleshooting. There are three general methods:
Directly let the carpenter leave a 40cm × 40cm opening, and then cover it with a woodworking plate;
The air return outlet is lengthened, generally 40cm long and 10cm wider, which looks integrated and beautiful;
Directly leave 40cm × 40cm, and then make a grille ABS air outlet independently.

duct fan

The above contents explain in detail the differences between duct fan and central air conditioner, and the advantages and disadvantages of duct fan in use. Considering the actual use, it can play a reference role in the selection of duct fan or central air conditioner.

1 thoughts on “What Is The Duct Fan

  1. Avatar of amiliy amiliy says:

    really good!!!

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