Ventilation silencers are designed to reduce airborne noise generated by axial and centrifugal fans in both intake and exhaust applications. These silencers are commonly used in HVAC systems, air handling units, rooftop exhausts, and industrial ventilation ducts to control turbulence-induced noise, blade-passing tones, and system resonance
Utilizing absorptive acoustic technology, ventilation silencers are internally lined with high-density, erosion-resistant acoustic media. As air passes through the silencer, sound energy is absorbed through thermal and frictional losses— delivering effective noise control with minimal impact on airflow or static pressure.
Available in circular and rectangular formats, as well as inlet box and elbow configurations, these silencers are highly adaptable to a variety of duct layouts and performance requirements.

Key Features

Broadband Noise Control

Controls fan-generated noise across a wide frequency range, including mid- and high-frequency turbulence and blade-passing tones.

Construction Materials

Manufactured in galvanized or stainless steel with perforated internal liners.

Absorptive Acoustic Media

Filled with mineral wool or fiberglass insulation offering high flow resistance, enclosed in perforated liners for protection and performance.

Low Pressure Drop Design

Internal configurations are optimized to allow airflow to pass efficiently while achieving targeted acoustic attenuation.

Versatile Configurations

Rectangular straight-through design for supply and return air systems Elbow silencer for turning airflows with integrated acoustic performance Inlet Box silencer for mounting directly to fan intake
Circular silencers for round duct or fan connections Available in various lengths and pressure drop configurations

Typical Applications

Fan inlets and exhausts in industrial or commercial settings HVAC supply and return ducts
Rooftop mechanical equipment
Process ventilation and filtration systems Mechanical rooms and building plenums
Noise-sensitive environments requiring code or OSHA compliance

Performance by Design

Fan inlet silencers are acoustically and aerodynamically engineered to provide targeted insertion loss with minimal disruption to airflow. Design factors such as media thickness, air velocity, and passage configuration are tailored to site- specific performance goals.
Key design considerations include:
Targeted sound frequency and octave-band insertion loss Airflow volume and system static pressure
Fan type and intake duct configuration Environmental durability and material selection Mounting orientation and available space
These silencers offer a reliable and efficient way to reduce noise at the system entry point, helping ensure compliance, comfort, and airflow integrity in demanding ventilation applications.