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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.
The Influence to Hearing of Different Decibel:
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!
Inline Duct Fan