Fantech LD 4 - Silencer, 4" Duct
Reduce noise from any circular duct with the help of the Fantech LD4 Silencer.
The Fantech LD4 Silencer can be fitted to any 4-inch circular duct to prevent noise. It comes with a connection for use with a standard spiral duct. It has a 2-inch thick insulation. For ducts that produce more noise, you can use two silencers together. This silencer can be installed immediately behind the fan or bend for effective function.