What Are Duct Type Fans?

Types, Application Areas, and Choosing the Right Fan

Duct type fans are fans installed inside ventilation ducts and used to exhaust contaminated air or transport fresh air. Thanks to their quiet operation, balanced air distribution, and aesthetic solutions, they are essential components of modern ventilation systems.
In this article, we clearly and simply explain what duct type fans are, what types are available, where they are used, and how to choose the right duct fan.

What Do Duct Type Fans Do?

Duct type fans:

• Exhaust contaminated air through duct systems

• Transport fresh air along the duct line

• Ensure continuous and balanced operation of the ventilation system

👉 They are especially used to control airflow in ducted ventilation systems.

Advantages of Duct Type Fans

• Quiet operation: Since the fan is installed inside the duct, noise is minimized in the occupied space

• Balanced air distribution: Air is evenly distributed through diffusers and grilles

• Aesthetic solution: The fan remains hidden; only grilles are visible

• Wide range of applications: Suitable for many areas, from offices to kitchens

Where Are Duct Type Fans Used?

Duct type fans are widely used in both commercial and industrial applications:

• Restaurant and café kitchens

• Offices and business centers

• Shopping malls

• Hotels

• Hospitals

• Schools

• Workshops and manufacturing facilities

• Residential projects

Types of Duct Type Fans

Round Duct Type Fans

Designed to be compatible with round duct systems, these fans offer easy installation and a compact structure. They are commonly used in small and medium-sized ventilation systems.

Rectangular Duct Type Fans

Suitable for projects requiring higher airflow rates. They are preferred in long duct runs and large-volume spaces.

External Rotor (Out-Motor) Duct Type Fans

The motor is located outside the airflow. This provides safer and longer-lasting operation when exhausting oily, dirty, or hot air. Ideal for restaurant kitchens and hood systems.

Explosion-Proof (Exproof) Duct Type Fans

Designed for environments containing explosive or flammable gases. Their spark-free construction ensures high safety and makes them suitable for chemical plants, paint shops, and gas-filled environments.

What to Consider When Choosing a Duct Type Fan

• Airflow rate (m³/h): The capacity must match the ventilation requirements of the area

• Duct size: The fan dimensions must be fully compatible with the duct dimensions

• Static pressure: If there are long ducts, bends, or filters, a fan capable of providing sufficient pressure should be selected

• Motor type: External motor fans for oily air; explosion-proof motors for hazardous environments

The Right Duct Type Fan for Efficient Ventilation

Duct type fans are key components of professional ventilation systems thanks to their quiet operation, balanced air distribution, and aesthetic design. Selecting the right fan according to the project ensures long-lasting, efficient, and trouble-free system performance.