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Industrial fan inlet silencers are part of an intake fan system and are designed to attenuate noise from the fan inlet. Air filters, inlet boxes, screens, and dampers may be included as part of the complete package. Silencer may be mounted on the fan or blower inlet or on a supply air duct or along a wall. Silencer may be tubular shaped and identified as a circular or round silencer as determined by the inlet flange geometry. Low-pressure loss through the silencer is the design goal and important to keep the fan horsepower requirement as low as possible. Final silencer selection is determined on airflow and sound levels required along with airstream/environmental air constituents a consideration.

Inlet fan silencers are manufactured in many configurations and materials to meet attenuation requirements. Collected data along with space envelope and required noise levels need to be firmly established before the silencer is successfully designed for an application.

Fan Inlet Silencer Construction Options


Many construction options are available and include:

  • Metal gauges to 3/8” steel plate
  • Carbon steel, stainless steels, or FRP
  • Flanges
  • Supports
  • Screens
  • Paints & coatings
  • Removable baffles
  • Horizontal or Vertical Configurations

Intake Fan System Silencer Accessories


Typical accessories would include:

  • Weather hoods
  • Filter housings
  • Transitions & evases
  • Airflow probes
  • Access doors

Intake Fan System
An Integral Part of an Industrial Ventilation System


Integrated industrial ventilation systems, where fan or blower noise is a contributor to overall plant noise, will incorporate an intake fan system on the fan or blower inlet.

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