Nailor's dissipative rectangular duct silencers are designed to offer superior acoustic and aerodynamic performance. Rectangular models utilize acoustical splitters, sometimes called baffles, for broad-band attenuation. Perforated metal protects the glass fiber from erosion by the airflow. The silencers incorporate glass fiber external to the duct connection size. Splitters vary in quantity and thickness, and air passages also vary in size. The splitters and center bodies are aerodynamically shaped to minimize pressure drop. The latest in control components and options provide maximum flexibility with a wide scope for cost effective innovation.