4" Inline Fan Noise Muffler Air Duct Silencer

Vendor: cannabisgeneral1
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...

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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.

Features:

  • 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.

Specifications:

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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