Sku: LAS002001
Product Type: Air Purification
Air Purification
• Payment Cleared before 12pm PST will be shipped out in the same business day (Pre-Orders Excepted).
30-Day Warranty & Return Policy

This is a brand new Upgraded Inline Duct Muffler 4 inches 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. Make your indoor gardening fan obviously quieter.


  • Upgraded inline duct muffler for 4" flange high velocity fans, with sound absorbing foam lining to reduce noises from fan and carbon filter systems in grow room
  • Effective Sound Absorption - Egg-like wave crest polyurethane sponge for good sound and vibration absorption when air flow through the ducting, making a comfortable environment
  • Moist-Resistance - Stainless-steel sheet housing for anti-corrosion , great in damp environment
  • Easy Installation - Extended collar and lip for easy duct hook-up 
  • Use Suggestion - To connect with the muffler and fan through ducts
  • Ideal for Heating, Ventilation and Air Conditioning System, to deliver air in grow tent, greenhouse and grow room


  • Flange: 4"
  • Fit for Fans/Blowers: 4" Flange
  • Material: Stainless-steel
  • Sound Absorbing Foam: Wave Crest Polyurethane Sponge
  • Fusion Point of Foam: 250 degree centigrade
  • Overall Dimension(DxH): 6 7/8" x 12" 
  • Net Weight: 1.9 Lbs (0.86 kg)

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 Includes:

    • 1x Upgraded Duct Muffler With Thick Sound Absorbing Foam
    • Free UPS standard shipping on all US orders (lower 48 States)
    • Orders before 12pm. PST will be shipped out in the same business day. Usually will be delivered in 2-5 business days for the lower 48 States.

    • If interested in picking up items locally, we highly recommend calling us to check for availability beforehand. Please note that local will call pick up is only available in our California Facility. All will call transactions are CASH ONLY. Please do not place an order online as all online orders will be shipped. Our will call location and hours are as follows:

    Location: 185 N. Sunset Ave
    City Of Industry, CA 91744

    Hours: Monday – Fridays from 9:00AM to 4:30PM
    *Please note that we are only able to hold items for 24 hours.

    • Additional Shipping Fees for Expedited Shipping and DHL Worldwide Service


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