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Inlet box silencers - Model 132 standard grade, sheet metal construction - dB Noise Reduction



  • Fan inlet silencers
  • Pressure blower inlet silencers
  • Motor silencers


  • Reduces cost on fans and blowers by serving as a combination silencer/fan inlet box, all in one
  • Much higher attenuations than straight through silencer designs due to acoustic elbow effect
  • Aerodynamically designed long radius elbow baffle passages (CR = 0.5) for minimum pressure drop

Advantages over welded silencers

  • 20% to 30% cost savings
  • Much lighter than welded silencers
  • Suitable for many light/medium industrial applications


  • Galvanized and stainless steel mesh bird, insect and safety screens
  • Flanges match drilled to connecting equipment or ductwork; rectangular or circular
  • Mounting brackets, support legs, saddles and feet for silencer installation
  • Access panels and doors for inspection of internals
  • Variety of fabric, film and mesh baffle liners available for different types of service
  • Pressure and flow measurement devices including pressure taps, rings and piezometer tubes

Design options

  • Cleanable/removable baffle designs for dirty applications including special silencers that can be serviced in-situ
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Inlet box silencer features

Inlet box silencer sheet metal features - image - dB Noise Reduction

Alternative construction - Model 133 industrial grade, all welded construction

Product details


Up to 100,000 acfm


Up to 30" wg


Up to 250° F


From 12" X 12" X 24" long
to 60" X 60" X 120" long

Unit weight:

Up to 1,500 lbs


Mill galvanized (standard). Stainless steels
and aluminum available


20 ga to 16 ga welded sheet metal casings
with 22 ga acoustic baffles

Paint finishes:

Alkyd and enamel finishes available

For other customized silencer designs, please contact us and we will be happy to assist you.


Servicing clients in the US, Canada, Mexico, and many international locations worldwide.