Hydroponics 4" Inline Fan Duct Noise Muffler Silencer - TheLAShop

Hydroponics 4" Inline Fan Duct Noise Muffler Silencer

Overall Rating 4 out of 5

Retail: $56.99


SAVE 30%


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All of our domestic orders are shipped within same business day, assuming your orders are paid and completed by 12:00pm PST/2:00pm CST/3:00pm EST.

All orders are verified for validity and security of our customers. Any inaccuracies during our verification process will delay in processing your order. (i.e. orders with different billing/shipping information provided)

International orders are processed within 2 business days due to longer verification details.

All orders placed on Saturdays, Sundays, and major US Holidays will be processed the following business day.

We may ship each product separately from different warehouses, as we utilize alternative warehouses across the Continental United States.
Standard Shipping: 1-7 Business days
Expedited Shipping Available: 1-3 business days

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Product Information

This is a brand new Upgraded 4" Inline Duct Muffler for 4" high velocity fans/blowers. With durable galvanized sheet construction and sound absorbing foam lining, our duct muffler can reduce noise effectively and prevent your health from being hurt by noise. The special designed open cell foam in a convoluted pattern as egg crate is good for superior sound absorption. It can stop the spread of sound wave and allow air flow get through the ducting, perfect for reducing noise from fans and carbon filter systems.


  • Two 4" flanged ends.
  • Portable and light weight.
  • Safe and effective operation.
  • Easy to install and maintenance free.
  • The thickness of sound absorbing foam has been upgraded to 3-1/4"
    (that is more effective than 1-1/2" or 2" in the market)
  • High-quality corrosion resistant galvanized sheet construction.
  • Wave crest polyurethane sponge can offer excellent sound and vibration absorption.
  • Moisture resistant - great for use in damp environment.
  • Extended collar and lip for easy duct hook-up.
  • Suggest to use with your 4" ducting(not included) to connect with this muffler and your blower.


    Flange 4"
    Fit for Fans/Blowers 4" Flange
    Surface Material Durable Galvanized Sheet
    Sound Absorbing Foam 3-1/4" Thick Wave Crest Polyurethane Sponge
    Fusion Point of Foam 250 degree centigrade
    Overall Size 6-1/2" Diam. x 15-3/4" Long

The Influence to Hearing of Different Decibel:

    Decibel Sense of Hearing
    0-20db Very quiet, hardly feel
    20-40db Quiet, like soft voice
    40-60db General, like common talk indoor
    60-70db Noisy, bad for nerve
    70-90db Very noisy, nerve cells are damaged
    90-100db Noisy intensify, hearing is damaged

Package Contents:

  • 1x Upgraded 4" Duct Muffler With Thick Sound Absorbing Foam

Our excellent duct muffler can make your indoor gardening fan obviously quieter, and help you to keep the good health of hearing. Enjoy your healthy life!

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