The impeller is mounted directly on the motor shaft. The fans are equipped with high-quality three-phase asynchronous single-speed motors. It is possible to use frequency control of the rotation speed.

The fan has improved protection against rain precipitations and leaks.

Motor ingress protection rating IP54.

The installation dimensions on the base plate are unifi ed with KROV roof fans. Roof fans can be easily installed with a reduced-size STAM roof curb. 

Design:

• general purpose industrial (N); 
• corrosion-resistant (CR1 and CR3); 
• explosion-proof (V); 
• corrosion-resistant, explosion-proof (VCR1).