For attenuation of the noise produced by a ventilation system and spreaded along ventilation ductworks. Used jointly with sound-insulated fans in premises with high requirements to noise level produced by ventilation equipment. Compatible with 400x200 mm up to 1000x500 mm rectangular air ducts.
Galvanized steel case and sleeves. The plates are filled with non-flammable sound-absorption material with protecting coating to prevent fiber blowing.
Fixing to rectangular ducts with flange connection. For maximum sound absorption capacity provide a straight air duct section at least 1 m long towards the silencer. For better sound absorption install the silencers in series.