Description
EC Axial Duct Fan VN-Duct EC
The VN-Duct EC is an axial duct fan equipped with an energy-efficient EC motor, designed to supply or extract air through a duct system. The fan is available in diameters ranging from 310 to 900 mm, with air capacities of up to 35,000 m³/h and a maximum static pressure of 550 Pa.
Thanks to its integrated EC motor with IE5 efficiency class, the VN-Duct EC combines efficient drive technology with precise, stepless speed control. The fan is suitable for applications requiring high air volumes at relatively low pressures, with airflow that can be accurately controlled.
When should you choose an EC axial duct fan?
An axial duct fan is installed directly in an air duct and moves air along the length of the duct. The VN-Duct EC is particularly suitable for applications requiring high airflow, relatively low pressure and an energy-efficient, controllable drive.
Typical applications include:
- Industrial ventilation and air conditioning systems.
- Ventilation in marine and mining applications.
- Evaporative cooling towers and heat exchangers.
- Cooling of electrical and refrigeration equipment.
- Air supply and extraction in industrial duct systems.
The fan is designed to handle clean to slightly dusty, non-abrasive air. The permitted air temperature range is -20°C to +50°C.
Energy-efficient and stepless speed control
The VN-Duct EC is equipped with a brushless synchronous permanent magnet motor with electronic commutation. The motor has an IE5 efficiency class, IP55 protection rating and Class F insulation. The integrated motor controller makes the fan easy to connect and commission.
The speed can be adjusted steplessly using various control signals:
- 0–10 V.
- 4–20 mA.
- PWM.
- RS485/Modbus.
This allows the airflow to be adjusted to the actual ventilation requirements. It is particularly useful in applications where airflow demand varies and the fan does not need to operate continuously at maximum speed.
The VN-Duct EC is part of our range of EC fans.
Versions and capacities
The VN-Duct EC is available in various diameters ranging from 310 to 900 mm. Depending on the version, the maximum airflow capacity is 35,000 m³/h and the maximum static pressure is 550 Pa.
The series is available with different casing lengths, depending on the available installation space and the desired accessibility of the motor. In one version, the motor-impeller assembly is almost entirely enclosed within the casing. In another, the assembly is fully contained within the overall casing length, or the motor partially protrudes to improve accessibility.
Maximum airflow capacity and maximum pressure do not occur at the same operating point. The actual airflow achievable depends on the resistance of the duct system.
Detailed performance data at different operating points and the full dimensions can be found in the VN-Duct EC datasheet, under the ‘Downloads’ tab. Would you like to know which version is suitable for your application? Feel free to contact us.
Robust construction and material options
The VN-Duct EC features a robust casing made of coated steel or, depending on the version, stainless steel. The mounting flanges are formed directly from the casing. Combined with the material thickness, this contributes to a sturdy construction.
The high-efficiency impeller features airfoil blades and is available in plastic or aluminium. Depending on the version, the blade pitch angle can be adjusted while the fan is stationary. The impeller is balanced in accordance with the applicable balancing standards.
The standard version is supplied with a mounted terminal box. Various accessories are available depending on the installation, including an inlet cone, silencers, safety guards, flexible connections, anti-vibration mounts and mounting components.
These options allow the fan to be adapted to the installation requirements and the duct system.
Accessories and mounting options
Depending on the version and application, the VN-Duct EC can be fitted with various accessories for mounting, connection, noise reduction and protection.
Available accessories include:
- Inlet cone to ensure smooth airflow into the fan.
- Silencers to reduce noise generated by the airflow.
- Safety guards to protect the inlet or outlet opening.
- Inspection door to provide access to the fan for inspection and maintenance.
- Flexible connections to connect the fan to the duct system.
- Anti-vibration mounts to reduce the transmission of vibrations to the supporting structure.
- Counter flanges for mounting and connecting the fan to the duct system.
- Mounting feet for horizontal installation.
- Speed controller for adjusting the fan speed.
Accessory availability depends on the selected version and installation method. This allows the VN-Duct EC to be adapted to the available installation space, the required connections and the specific requirements of the installation.
Technical specifications
- Type: Axial duct fan
- Motor: Brushless synchronous EC motor with permanent magnets
- Motor efficiency class: IE5
- Power supply: 230 V / single-phase or 400 V / three-phase
- Motor protection rating: IP55
- Insulation class: F
- Diameter: 310 to 900 mm
- Maximum airflow capacity: Up to 35,000 m³/h
- Maximum static pressure: Up to 550 Pa
- Control options: 0–10 V, 4–20 mA, PWM and RS485/Modbus
- Casing material: Coated steel or stainless steel, depending on the version
- Impeller material: Plastic or aluminium, depending on the version
- Permitted air temperature: -20°C to +50°C
- Air type: Clean to slightly dusty, non-abrasive air
- Airflow direction: From motor to impeller or from impeller to motor, depending on the version
Full technical specifications, dimensions and performance curves for each model are available in the VN-Duct EC datasheet.
VN-Duct EC or another duct fan?
The VN-Duct EC is a specific series within our range of duct fans. If you require higher pressure, a different airflow capacity, an alternative material or a specific motor configuration, another duct fan may be better suited to your application.
Explore our full range of duct fans or contact us. We can help you select a suitable version based on the required operating point, duct diameter and control requirements.
Choosing the right EC axial duct fan
Selecting a duct fan involves more than just the duct diameter. The required airflow and the pressure demanded by the duct system are key factors in determining which version is suitable.
Have you already determined the required operating point? We can use this information to select a suitable VN-Duct EC. If not all the details are available yet, that is no problem. Feel free to discuss your requirements with us by phone or email. We will be happy to help you find the right fan for your application.
This product is part of our range of axial fans, duct fans and EC fans.
