ECOFIT Axial Fans

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Understanding VRE, VGR, VPR, VGV and VGC constructions

ECOFIT axial fans meet air circulation requirements in a wide range of ventilation, refrigeration and equipment-cooling applications. To facilitate their integration, the range offers five constructions: VRE, VGR, VPR, VGV and VGC.

What do these designations mean? They distinguish between the motorised propeller alone, versions with protective guards and fans fitted with a round or square ring. Each configuration meets specific mounting, space and protection requirements.
 

How does an axial fan work?
In an axial fan, also known as a propeller fan, air flows parallel to the propeller’s axis of rotation. As the blades rotate, they move the air in this direction.

This principle enables large volumes of air to be moved within a compact space. It is particularly suitable for installations requiring high airflow at low pressure, with an air circuit offering little resistance.

All ECOFIT constructions operate according to this same principle. The components surrounding the motorised propeller determine how the fan is integrated into the equipment.
 

VRE: the motorised propeller for integration into your equipment
The VRE construction consists of a motorised propeller, combining the motor and propeller without a guard or ring.

This configuration provides great integration flexibility: the equipment designer determines the mounting support, airflow environment and required protective measures.
VGR: the motorised propeller with a flat guard
The VGR construction combines the motorised propeller with a flat protective guard.

Positioned in front of the propeller, the guard helps restrict access to the blades from the protected side while allowing air to pass through. Its flat design is particularly useful when the available space in this direction is limited.

The choice and positioning of the guard must also take its influence on airflow into account.
VPR: the motorised propeller with a basket guard
VPR axial fans are fitted with a basket guard, whose enclosing shape extends further around the propeller.

This construction helps restrict frontal and lateral access to the blades from the fitted side. It is designed for applications requiring more extensive protection than a flat guard can provide.

The guard’s geometry and its distance from the propeller affect aerodynamic and acoustic performance. These characteristics must therefore be considered when selecting the fan.
VGV: the axial fan with a round ring
The VGV construction features a round ring, a peripheral component that surrounds the propeller and helps guide the airflow.

This shape facilitates integration into a circular opening or duct. A suitably designed ring helps control airflow around the propeller and reduce aerodynamic losses.
VGC: the axial fan with a square ring
The VGC construction features a square ring, suitable for installation on a flat panel, frame, enclosure or casing.

The square shape refers to the outer mounting frame: the propeller continues to rotate within a circular opening. This configuration facilitates fan mounting and integration into the front panel of equipment.

The VGC designation also applies to axial fans fitted with cast-aluminium square rings.
 

How should you choose the construction of your ECOFIT axial fan?
The choice depends on both the ventilation requirements—airflow and pressure—and the design of your equipment: available dimensions, motor technology, airflow direction and required noise level. Final performance depends on the fan and its installation environment as a complete system.

Are you looking for an axial fan suited to your application? Explore our ECOFIT range or contact our team during the design stage of your project to determine the construction that best meets your requirements.