The silencer is a high efficiency passive type, designed to reduce the amplitude of gas pulses from the fan discharge. They work over the wide frequency band and offer excellent performance, to mitigate the sound generated by the fan rotation speed. Thanks to their original design they can be installed in any position, horizontally or vertically.

Its design is rectangular in shape, consisting of a tube with flanges at its ends, lined on the inside with absorbent material, covered by a perforated metal sheet. It is equipped with an aerodynamically shaped central element; it allows to obtain with a low pressure loss, high acoustics.