26GA Galvanized flat rings in both 1.5" and 1" width. 14" and larger are 24GA
Rings are nominal sizes.

An effective HVAC system should deliver more than just temperature control; it should also contribute to a quiet, comfortable environment. Air duct silencers, also known as duct mufflers, help reduce unwanted noise generated by fans, blowers, and airflow turbulence. Integrating these components into ductwork creates a more pleasant indoor space without compromising system performance.

Alan Manufacturing specializes in high-performance duct silencers for commercial, residential, and industrial HVAC systems. With over 30 years of experience and more than 1,000 unique product designs, we offer standard and custom solutions tailored to your specific needs.

What Is a Duct Silencer?

A duct silencer is a noise-reducing device installed in an HVAC duct system to minimize sound transmission caused by fans, airflow turbulence, external equipment, or structural vibration. These silencers are designed to absorb and dissipate sound waves while allowing uninterrupted airflow, making them a practical solution for managing acoustic performance in ventilation systems.

Unlike conventional insulation, duct silencers are constructed with internal air chambers or baffles that disrupt sound waves as they pass through. Depending on the acoustic profile of your system, silencers can be customized in shape, length, and design to effectively reduce specific types of noise, whether high-pitched fan hums or low-frequency rumbling.

For hygiene-sensitive environments, such as hospitals, labs, or food production areas, Alan Manufacturing offers silencers made without fibrous materials, which helps prevent particle shedding and simplifies cleaning.

Key benefits of Alan Manufacturing’s duct silencers include:

• Quieter operation without restricting airflow
• Custom options for frequency-specific noise reduction
• Compatibility with new or retrofit systems
• Safe, cleanable options for sterile or hygienic environments

Why Use Duct Silencers in HVAC Systems?

Noise control is an important aspect of HVAC design, especially in environments where comfort, focus, and communication are priorities. Offices, schools, hospitals, and more can all be negatively affected by background noise generated by HVAC equipment. Without proper sound attenuation, you risk:

• Reduced occupant comfort and satisfaction
• Productivity losses in work and learning environments
• Difficulty meeting building code requirements for noise levels

Installing duct silencers is a straightforward and cost-effective way to reduce sound transmission and improve acoustic performance. Alan Manufacturing’s silencers are used in a diverse range of HVAC applications to create quieter, more functional spaces without requiring major changes to system design.

Alan Manufacturing's Duct Silencer Solutions

We offer duct silencers in both circular and rectangular designs to suit various ductwork layouts and acoustic goals. All silencers are built with durable materials and manufactured in-house to ensure consistent performance and fast turnaround.

Circular Duct Silencers

• Available diameters: 4" to 16"
• Length options: 24", 36", and 48"
• Custom sizes and lengths available

Rectangular Duct Silencers

• Height options: 8" and 10"
• Width options: 8", 10", 12", and 14"
• Length options: 24", 36", and 42"
• Custom sizes and lengths available

Whether you’re working on a new facility or updating an existing system, Alan Manufacturing can provide off-the-shelf products or engineer custom solutions to meet your project’s unique requirements.

Order or Request a Custom Quote from HVAC Duct Silencer Experts

Alan Manufacturing has been a trusted partner for HVAC professionals for over three decades. Our team works closely with you to deliver reliable, high-quality duct silencers that improve noise levels without sacrificing system performance.

Contact us today to learn more about our HVAC duct silencers or request a quote to get started on your next project.