The DS rectangular cased attenuator design offers, as standard, many advanced features including aerodynamic splitters and side liners, slide-on flanges and erosion protected acoustic infill covered by galvanized perforated sheet metal. Casing conforms to DW 142 Class B ductwork code.

The DS rectangular cased attenuator design offers, as standard, many advanced features including aerodynamic splitters and side liners, slide-on flanges and erosion protected acoustic infill covered by galvanized perforated sheet metal. Casing conforms to DW 142 Class B ductwork code.