| Technical Features: 
(1 + 2) Almost vibration-free construction through multipart frame design. The vibrations are passed through vibration deflectors to vibration absorbers. As a result the vibrations are almost completely eliminated in the frame of the fan. (3) A weighted frame provides additional vibration damping. Furthermore, the additional mass means that any opera ting noises coming from the drive and bearings sound darker and therefore subjectively quieter and more pleasant to the human ear. (4) Frame with rebound design. In comparison to fans of a classical construction, the contact surface with surrounding frame elements when the fan is installed is minimized (depending on the construction of the system). This therefore further reduces the transmission of vibrations. Aerodynamic Optimizations (5 + 6) Aerodynamically optimized: frame and struts. Rounded components reduce the turbulence and lower the volume of the air current. In the 80 millimeter models the number of internal struts has also been reduced from four to three. Here the multiframe fans take into account the fact that today the air current itself is one of the loudest sources of noise and additional measures for reducing noise should therefore relate to this. In contrast to some other volume-optimized fans of a classical construction, the multiframe fans use an air deflection frame. The full efficiency of the air conveyance system is therefore retained. (7) Shape-optimized impeller with anti-dust surface. This results in a higher air flow rate with less noise and an improved design. Vibration-Optimized: Drive and Bearings (8) A specially optimized EKA external rotor motor ensures improved quiet running and reduced vibrations. NB-NanoSLI long-life slide bearing for a high level of precision: the run time-optimized precision bearing guarantees exact vibration-free revolutions and increased system stability. During development, particular attention was paid to durability. Rapid wear and tear and misalignment was prevented. As a result the bearing remains quiet even after long-term operation. Six years guarantee. Low starting voltage. The fan starts to turn even at 4.5 V, depending on the model. This makes it possible to use the fan over a sizeable voltage range, while also enabling reliable and quiet operation even in low voltages fields. | 
