VENTS VKF 4E 450 Axial Inline Fan Ø450 mm, 4,680 m³/h

VENTS VKF 4E 450 is a professional axial duct fan for systems that require high airflow at relatively low resistance. The model is designed for direct installation in an air duct and provides a maximum airflow of up to 4680 m³/h at a power rating of 250 W. Its robust steel housing with polymer coating, single-phase AC motor with ball bearings and integrated thermal protection make it suitable for greenhouses, warehouses, production premises and other professional ventilation installations.

VENTS VKF 4E 450 is part of the industrial series of axial fans VENTS OV / OVK / VKF. The main difference of the VKF is its construction designed for direct installation in a ventilation duct, allowing it to be easily integrated into supply and extract ventilation systems.

The fan is suitable for applications where it is necessary to move a large volume of air at relatively low system resistance. At a 50 Hz power supply, the model reaches a maximum airflow of 4680 m³/h, while the motor operates at approximately 1350 rpm and consumes 250 W.

The construction has been developed with an emphasis on reliability during continuous operation. The housing and impeller are made of steel with a durable polymer coating, providing mechanical strength and additional protection for the metal surfaces.

The 4E model uses a four-pole single-phase asynchronous AC motor with an external rotor. The motor has integrated thermal-overload protection, and the ball bearings are designed for a long service life. For this series, the manufacturer specifies a bearing design life of at least 40 000 operating hours.

Another important advantage is the possibility of speed control. When using a suitable thyristor or autotransformer controller, the speed can be controlled smoothly or in steps. This makes it possible to adapt the airflow to the actual requirements of the room.

The operating temperature range at 50 Hz is from -30°C to +60°C, allowing the fan to be used in a variety of conditions. The VKF series has a stated protection rating of IPX4.

Technical specifications

✔️ Manufacturer: VENTS
✔️ Series: VKF
✔️ Model: VKF 4E 450
✔️ Type: Axial duct fan
✔️ Installation: In a duct
✔️ Motor type: AC, asynchronous with external rotor
✔️ Number of poles: 4
✔️ Phases: 1
✔️ Power supply: 220–240 V
✔️ Frequency: 50/60 Hz
✔️ Power at 50 Hz: 250 W
✔️ Current consumption at 50 Hz: 1.2 A
✔️ Maximum air flow at 50 Hz: 4680 m³/h
✔️ Speed at 50 Hz: 1350 rpm
✔️ Noise level at 3 m: 56 dB(A)
✔️ Operating temperature at 50 Hz: -30 to +60°C
✔️ VKF protection rating: IPX4
✔️ Bearings: Ball bearings
✔️ Design bearing life: minimum 40 000 hours.

When operating at 60 Hz

✔️ Power: 325 W
✔️ Current: 1.46 A
✔️ Maximum airflow: 4790 m³/h
✔️ Speed: 1600 rpm
✔️ Noise level at 3 m: 57 dB(A)
✔️ Transported-air temperature: -30 to +50°C.

📐 Dimensions and weight

For VKF 4E 450, the official manual states:

📦 The kit includes

✔️ 1 × VENTS VKF 4E 450 axial fan

✔️ Factory-fitted motor and impeller

✔️ Terminal box for electrical connection

The speed controller and the remaining duct-system components are used separately according to the specific installation.

Benefits

✔️ High airflow – up to 4680 m³/h

✔️ Direct installation in a ventilation duct

✔️ Robust steel construction

✔️ Protective polymer coating

✔️ Single-phase AC motor with external rotor

✔️ Built-in thermal overheating protection

✔️ Ball bearings for long-term operation

✔️ Speed-control capability

✔️ Operating range up to +60°C at 50 Hz

✔️ Suitable for professional supply and extract systems.

🔧 Applications

VENTS VKF 4E 450 is suitable for:

• Greenhouses
• Nurseries
• Storage areas
• Production areas
• Workshops
• Technical rooms
• Commercial and industrial facilities
• Supply ventilation
• Extract ventilation
• Ventilation systems requiring high airflow.

📋 Installation and use

1. Choose a suitable location in the ventilation system.
2. Install the fan securely in the relevant duct.
3. Match the airflow direction to the marking on the housing.
4. Make the electrical connection according to the diagram and the official VENTS manual.
5. If necessary, add a compatible speed controller.
6. After installation, check for vibration, unusual noise and correct airflow direction.
7. Carry out periodic maintenance and clean the impeller.

⚠️ Important: VKF 4E 450 is an high-flow axial fan, intended mainly for systems with relatively low aerodynamic resistance. In systems with a high pressure drop, multiple bends, long ducts or highly restrictive filters, it is important that the fan be sized according to the actual operating point, rather than only according to the maximum free airflow.

💡 Tip from Urban Botaniks: When designing greenhouse or professional ventilation, do not choose the fan solely by the 4680 m³/h rating. Take into account the diameter and length of the ducts, the number of bends, grilles and other resistance in the system to obtain the necessary actual