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 unnecessary noise. The special designed open cell foam in a convoluted pattern, mimics an egg crate design. This is good for superior sound absorption. It can stop the spread of sound waves and allow air flow to 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.
- Corrosion resistant galvanized sheet construction.
- 3¼" Sound absorbing foam offers great sound and vibration absorption.
- Moisture resistant - great for use in a damp environment
- Suggested use with 4" ducting (not included)