APPLICATIONS
- Combined supply and exhaust ventilation systems for various premises where high air flow at relatively low system resistance is required.

DESIGN
- The fan casing and the impeller are made of steel with polymeric coating.
- VKF fan is fitted with the external terminal box mounted on the fan casing.

MOTOR
- The impellers are powered by two-, four- or sixpole, single or three phase asynchronous motors with external rotor and built-in thermal overheating protection depending on the model.
- Ball bearings in the motor provide long service life designed for at least 40 000 hours.
- Motor protection rating IP X4.

SPEED CONTROL
- Both smooth or step speed control is performed by means of the thyristor or autotransformer controller.
- Several fans can be connected to one controller if the total power and operating current do not exceed the rated controller values.