Rectangular duct silencers, also known as PN silencers, are specifically designed for installation in rectangular air ducts. These devices are engineered to effectively reduce noise levels in specialized enclosures and standard HVAC systems. PN silencers are manufactured in a baffle-type configuration (with internal dividers) and are available in various sizes and shapes to meet different requirements. Pakhsh Niroo Company produces a wide range of duct silencers in different dimensions and specifications for a variety of applications.