CATALYTIC SILENCERS
IEC-COMBO Catalytic Silencers combine advanced emission control and high-grade noise attenuation in one compact, durable design.
Designed for internal combustion engines, the IEC-COMBO Series integrates advanced catalytic elements with customizable silencing technology to ensure operators meet even the most demanding emissions and acoustic compliance standards.
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Constructed from heavy-duty carbon steel or corrosion-resistant stainless steel, the IEC-COMBO silencers are built to withstand harsh industrial environments. With multiple orientation options and a full range of attenuation levels — from residential grade to super hospital plus, every unit can be custom-engineered to your project’s specific horsepower, emissions profile, and installation layout.
Emission Control
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Three-Way: NOx, CO, HcHo
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Oxidation: CO, NMHC, HcHo
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Diesel Oxidation: CO, NMHC, PM
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Typical Application
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Gas reciprocating internal combustion engines
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Natural gas compression packages
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Electrical power generation systems
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Engine-driven pumps and heavy-duty industrial equipment
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Construction
Standard units include heavy duty carbon steel welded construction with high heat black paint. Sizes 6" and below come with standard ID/OD connections. Sizes 8" and above come standard with ANSI flanged connection. Additional connections are available please contact Industrial Exhaust for more details.
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Options
304SS and 316SS options available
Custom inlet / outlet options
Removable insulation covers
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Accessories
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Flexible Connections
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Vertical and horizontal mounting solutions
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Rain caps
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Complete range of piping/fittings and exhaust accessories
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SILENCER GRADES
IEC-Residential-SA
19 to 25 dBA Noise Reduction
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Provides reliable exhaust noise control for stationary engines, marine power, and mobile equipment where only moderate attenuation is needed.
IEC-Hospital-SA
35 to 42 dBA Noise Reduction
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Hospital-grade silencer engineered for critical noise reduction in low ambient environments, suitable for stationa, schools, marine, and power.
IEC-Critical-SA
25 to 35 dBA Noise Reduction
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Engineered for residential areas with low background noise, reducing exhaust levels to align with surrounding ambient conditions effectively.
IEC-Hospital Plus-SA
35 to 50 dBA Noise Reduction
Hospital Plus silencer engineered for very low ambient noise, combining reactive and absorptive features for stationary and mobile power applications.
IEC-Super Critical-SA
32 to 42 dBA Noise Reduction
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​Engineered for quiet residential areas with very low background noise, providing super critical silencing where maximum attenuation is necessary
IEC- Super Hospital Plus-SA
45 to 60 dBA Noise Reduction
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Top-grade silencer engineered for maximum attenuation in ultra-low noise environments, using reactive and absorptive design for critical applications.