Reduce the noise of your inline fan and exiting duct air by using the best muffler/silencer on the market. Proven to reduce more noise than any other muffler available. This unique glass pack silencer will not erode like competitor foam products. For additional sound dampening, we recommend using a Phat Muffler on both the intake and exit of your inline fan.

• 85% Noise Reduction Coefficient (NRC)—best on the market
• Lightweight aluminum construction—easy to hang, no rust
• 45-degree inner taper before flanges helps reduce more noise
• Phat Glass pack won't disintegrate like foam products
• 4" to 12" sizes available—regular length & super Phat mini sizes 
• Maximum free flow air movement