Air vents are an important device in the ventilation system of factories and enterprises. Air vents help circulate air in the factory, remove hot air and dust, providing a comfortable and safe working environment for workers.
Are you building a factory or enterprise but don't know which type of air vent to choose? Don't worry, Sao Viet Air Duct will suggest you 4 types of air vents ideal for the above space.
1. Return air vent with dust filter
The return air vent with dust filter is the type of vent used to suck hot air and dust out of the factory. This type of door has an additional dust filter inside, helping to prevent dust and impurities from entering the air conditioning system, ensuring air quality in the factory.

Return air vents with dust filters are often installed in low, wind-protected locations such as low walls or windows. This type of door plays an important role in protecting the air conditioning system, providing a comfortable and safe working environment for workers.
Advantages of return air vents with dust filters
- Prevents dust and impurities from entering the air conditioning system, helping to increase the life of the system.
- Protect workers' health, provide a clean and fresh working environment.
- Save costs on maintenance and repair of air conditioning systems.
Disadvantages of return air vents with dust filters
- Dust filters need to be cleaned regularly to ensure dust filtering efficiency.
- The price is higher than the return air vent without dust filter.
2. Diffuser vent
Diffusers are a type of air vent used to distribute air or steam in air conditioning systems, ventilation systems, or other systems. This type of vent has the effect of diffusing air evenly throughout the space, bringing a feeling of comfort to the user.

Diffusers are typically installed in high, airy locations such as roofs or high walls. There are many different types of these doors, including:
- Round diffuser: This type of diffuser has a round shape and is often used in large factories.
- Square diffuser: This is the most common type of diffuser, with a square or rectangular shape.
- Axial diffuser: This type of diffuser has a rotating sash, which helps to adjust the direction of the diffused air.
Advantages of diffuser vents
- Diffuses air evenly in space, bringing a comfortable feeling to the user.
- Reduces wind noise.
- Increase the efficiency of air conditioning or ventilation systems.
Disadvantages of diffuser vents
- The price is higher than normal air vents.
- Proper installation is required to ensure effective diffusion.
3. 2-way curved slat air vent

- Door frame: Made of aluminum, steel or stainless steel.
- Door: Made of curved slats, can adjust wind direction.
- Rubber gasket: Helps prevent air from leaking out.
- Bolts, screws: Help fix the air vent to the installation position.
Advantages of 2-way curved slat air vents:
- The wind direction can be adjusted in two directions, making air circulation more effective.
- Beautiful design, suitable for many spaces.
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Good rainproof ability, durable when mounted outdoors
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The door can be adjusted to many angles
- Reasonable price.
Disadvantages of 2-way curved slat air vents:
- Easily damaged, need regular inspection and maintenance.
- Cannot adjust wind direction in multiple directions.
4. 7-way air vent
7-way air vent is a type of air vent with doors made from curved slats, which can adjust the wind direction in 7 directions. This type of door is often used in factories and workshops to circulate air.

7-way air vents have many advantages over other types of air vents, including:
- The wind direction can be adjusted in 7 directions, helping to distribute air evenly in the space.
- Reduces wind noise.
- Increase the efficiency of air conditioning or ventilation systems.
7-way air vents are often installed in high, airy locations such as roofs or high walls. This type of door can be used to supply fresh air, exhaust air, or diffuse air.



