Duct Silencer

ISTIQ Duct Silencers are designed to reduce noise traveling through ductwork and ventilation systems while maintaining the required airflow for the equipment or building. They are commonly used in HVAC systems, AHU rooms, fan rooms, plant rooms, generator rooms, acoustic enclosures, cleanrooms, industrial ventilation systems, and mechanical services installations.

Noise in duct systems can come from fans, air turbulence, dampers, air terminals, mechanical equipment, or noise breaking into the duct from nearby machinery. Without proper treatment, the ductwork can become a path for noise to travel from one area to another, affecting offices, hotels, hospitals, factories, laboratories, studios, or other noise-sensitive spaces.

A duct silencer allows air to pass through while reducing sound energy within the duct. Depending on the application, the silencer may be designed with acoustic splitters, absorptive lining, perforated metal surfaces, suitable casing thickness, flanged connections, access sections, and internal airflow passages. The design must balance insertion loss, airflow rate, face velocity, pressure drop, regenerated noise, space limitation, hygiene requirements, and installation arrangement.

A good duct silencer cannot be selected by duct size alone. The required noise reduction depends on the frequency spectrum, fan sound power level, duct layout, airflow velocity, distance to receiver, room noise criteria, and allowable pressure loss. If the silencer is too short or poorly selected, the noise reduction may not be enough. If it is too restrictive, the system may suffer from high pressure drop, airflow imbalance, or increased fan energy consumption.

To understand the silencer's construction, acoustic performance, pressure-drop considerations, suitable applications, and how to select the right duct silencer for your project, please continue to the full product page.